- 17 Apr, 2019 14 commits
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Greg Kroah-Hartman authored
commit c7084edc upstream. The n_r3964 line discipline driver was written in a different time, when SMP machines were rare, and users were trusted to do the right thing. Since then, the world has moved on but not this code, it has stayed rooted in the past with its lovely hand-crafted list structures and loads of "interesting" race conditions all over the place. After attempting to clean up most of the issues, I just gave up and am now marking the driver as BROKEN so that hopefully someone who has this hardware will show up out of the woodwork (I know you are out there!) and will help with debugging a raft of changes that I had laying around for the code, but was too afraid to commit as odds are they would break things. Many thanks to Jann and Linus for pointing out the initial problems in this codebase, as well as many reviews of my attempts to fix the issues. It was a case of whack-a-mole, and as you can see, the mole won. Reported-by:
Jann Horn <jannh@google.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Yueyi Li authored
[ Upstream commit c8a43c18 ] When KASLR is enabled (CONFIG_RANDOMIZE_BASE=y), the top 4K of kernel virtual address space may be mapped to physical addresses despite being reserved for ERR_PTR values. Fix the randomization of the linear region so that we avoid mapping the last page of the virtual address space. Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by:
liyueyi <liyueyi@live.com> [will: rewrote commit message; merged in suggestion from Ard] Signed-off-by:
Will Deacon <will.deacon@arm.com> Signed-off-by:
Sasha Levin (Microsoft) <sashal@kernel.org>
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Gilad Ben-Yossef authored
commit 293edc27 upstream This reverts commit c5f39d07 ("staging: ccree: fix leak of import() after init()") and commit aece0902 ("staging: ccree: Uninitialized return in ssi_ahash_import()"). This is the wrong solution and ends up relying on uninitialized memory, although it was not obvious to me at the time. Cc: stable@vger.kernel.org Signed-off-by:
Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by:
Sudip Mukherjee <sudipm.mukherjee@gmail.com> Signed-off-by:
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Nick Desaulniers authored
[ Upstream commit 5f074f3e ] A recent optimization in Clang (r355672) lowers comparisons of the return value of memcmp against zero to comparisons of the return value of bcmp against zero. This helps some platforms that implement bcmp more efficiently than memcmp. glibc simply aliases bcmp to memcmp, but an optimized implementation is in the works. This results in linkage failures for all targets with Clang due to the undefined symbol. For now, just implement bcmp as a tailcail to memcmp to unbreak the build. This routine can be further optimized in the future. Other ideas discussed: * A weak alias was discussed, but breaks for architectures that define their own implementations of memcmp since aliases to declarations are not permitted (only definitions). Arch-specific memcmp implementations typically declare memcmp in C headers, but implement them in assembly. * -ffreestanding also is used sporadically throughout the kernel. * -fno-builtin-bcmp doesn't work when doing LTO. Link: https://bugs.llvm.org/show_bug.cgi?id=41035 Link: https://code.woboq.org/userspace/glibc/string/memcmp.c.html#bcmp Link: https://github.com/llvm/llvm-project/commit/8e16d73346f8091461319a7dfc4ddd18eedcff13 Link: https://github.com/ClangBuiltLinux/linux/issues/416 Link: http://lkml.kernel.org/r/20190313211335.165605-1-ndesaulniers@google.comSigned-off-by:
Nick Desaulniers <ndesaulniers@google.com> Reported-by:
Nathan Chancellor <natechancellor@gmail.com> Reported-by:
Adhemerval Zanella <adhemerval.zanella@linaro.org> Suggested-by:
Arnd Bergmann <arnd@arndb.de> Suggested-by:
James Y Knight <jyknight@google.com> Suggested-by:
Masahiro Yamada <yamada.masahiro@socionext.com> Suggested-by:
Rasmus Villemoes <linux@rasmusvillemoes.dk> Acked-by:
Steven Rostedt (VMware) <rostedt@goodmis.org> Reviewed-by:
Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: David Laight <David.Laight@ACULAB.COM> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: <stable@vger.kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Nick Desaulniers authored
commit ac3e233d upstream. GNU linker's -z common-page-size's default value is based on the target architecture. arch/x86/entry/vdso/Makefile sets it to the architecture default, which is implicit and redundant. Drop it. Fixes: 2aae950b ("x86_64: Add vDSO for x86-64 with gettimeofday/clock_gettime/getcpu") Reported-by:
Dmitry Golovin <dima@golovin.in> Reported-by:
Bill Wendling <morbo@google.com> Suggested-by:
Rui Ueyama <ruiu@google.com> Signed-off-by:
Borislav Petkov <bp@suse.de> Acked-by:
Andy Lutomirski <luto@kernel.org> Cc: Andi Kleen <andi@firstfloor.org> Cc: Fangrui Song <maskray@google.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: x86-ml <x86@kernel.org> Link: https://lkml.kernel.org/r/20181206191231.192355-1-ndesaulniers@google.com Link: https://bugs.llvm.org/show_bug.cgi?id=38774 Link: https://github.com/ClangBuiltLinux/linux/issues/31Signed-off-by:
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Alistair Strachan authored
commit 379d98dd upstream. The vdso{32,64}.so can fail to link with CC=clang when clang tries to find a suitable GCC toolchain to link these libraries with. /usr/bin/ld: arch/x86/entry/vdso/vclock_gettime.o: access beyond end of merged section (782) This happens because the host environment leaked into the cross compiler environment due to the way clang searches for suitable GCC toolchains. Clang is a retargetable compiler, and each invocation of it must provide --target=<something> --gcc-toolchain=<something> to allow it to find the correct binutils for cross compilation. These flags had been added to KBUILD_CFLAGS, but the vdso code uses CC and not KBUILD_CFLAGS (for various reasons) which breaks clang's ability to find the correct linker when cross compiling. Most of the time this goes unnoticed because the host linker is new enough to work anyway, or is incompatible and skipped, but this cannot be reliably assumed. This change alters the vdso makefile to just use LD directly, which bypasses clang and thus the searching problem. The makefile will just use ${CROSS_COMPILE}ld instead, which is always what we want. This matches the method used to link vmlinux. This drops references to DISABLE_LTO; this option doesn't seem to be set anywhere, and not knowing what its possible values are, it's not clear how to convert it from CC to LD flag. Signed-off-by:
Alistair Strachan <astrachan@google.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Acked-by:
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Nick Desaulniers authored
commit ad15006c upstream. This causes an issue when trying to build with `make LD=ld.lld` if ld.lld and the rest of your cross tools aren't in the same directory (ex. /usr/local/bin) (as is the case for Android's build system), as the GCC_TOOLCHAIN_DIR then gets set based on `which $(LD)` which will point where LLVM tools are, not GCC/binutils tools are located. Instead, select the GCC_TOOLCHAIN_DIR based on another tool provided by binutils for which LLVM does not provide a substitute for, such as elfedit. Fixes: 785f11aa ("kbuild: Add better clang cross build support") Link: https://github.com/ClangBuiltLinux/linux/issues/341Suggested-by:
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Breno Leitao authored
[ Upstream commit 897bc3df ] Commit e1c3743e ("powerpc/tm: Set MSR[TS] just prior to recheckpoint") moved a code block around and this block uses a 'msr' variable outside of the CONFIG_PPC_TRANSACTIONAL_MEM, however the 'msr' variable is declared inside a CONFIG_PPC_TRANSACTIONAL_MEM block, causing a possible error when CONFIG_PPC_TRANSACTION_MEM is not defined. error: 'msr' undeclared (first use in this function) This is not causing a compilation error in the mainline kernel, because 'msr' is being used as an argument of MSR_TM_ACTIVE(), which is defined as the following when CONFIG_PPC_TRANSACTIONAL_MEM is *not* set: #define MSR_TM_ACTIVE(x) 0 This patch just fixes this issue avoiding the 'msr' variable usage outside the CONFIG_PPC_TRANSACTIONAL_MEM block, avoiding trusting in the MSR_TM_ACTIVE() definition. Cc: stable@vger.kernel.org Reported-by:
Christoph Biedl <linux-kernel.bfrz@manchmal.in-ulm.de> Fixes: e1c3743e ("powerpc/tm: Set MSR[TS] just prior to recheckpoint") Signed-off-by:
Breno Leitao <leitao@debian.org> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
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Yan Zhao authored
[ Upstream commit 663a50ce ] shadow mm's pin count got increased in workload preparation phase, which is after workload scanning. it will get decreased in complete_current_workload() anyway after workload completion. Sometimes, if a workload meets a scanning error, its shadow mm pin count will not get increased but will get decreased in the end. This patch lets shadow mm's pin count not go below 0. Fixes: 2707e444 ("drm/i915/gvt: vGPU graphics memory virtualization") Cc: zhenyuw@linux.intel.com Cc: stable@vger.kernel.org #4.14+ Signed-off-by:
Yan Zhao <yan.y.zhao@intel.com> Signed-off-by:
Zhenyu Wang <zhenyuw@linux.intel.com> Signed-off-by:
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Andy Lutomirski authored
[ Upstream commit 7ee18d67 ] My previous attempt to fix a couple of bugs in __restore_processor_context(): 5b06bbcf ("x86/power: Fix some ordering bugs in __restore_processor_context()") ... introduced yet another bug, breaking suspend-resume. Rather than trying to come up with a minimal fix, let's try to clean it up for real. This patch fixes quite a few things: - The old code saved a nonsensical subset of segment registers. The only registers that need to be saved are those that contain userspace state or those that can't be trivially restored without percpu access working. (On x86_32, we can restore percpu access by writing __KERNEL_PERCPU to %fs. On x86_64, it's easier to save and restore the kernel's GSBASE.) With this patch, we restore hardcoded values to the kernel state where applicable and explicitly restore the user state after fixing all the descriptor tables. - We used to use an unholy mix of inline asm and C helpers for segment register access. Let's get rid of the inline asm. This fixes the reported s2ram hangs and make the code all around more logical. Analyzed-by:
Jarkko Nikula <jarkko.nikula@linux.intel.com> Reported-by:
Pavel Machek <pavel@ucw.cz> Tested-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
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Andy Lutomirski authored
[ Upstream commit 896c80be ] x86_64 restores system call MSRs in fix_processor_context(), and x86_32 restored them along with segment registers. The 64-bit variant makes more sense, so move the 32-bit code to match the 64-bit code. No side effects are expected to runtime behavior. Tested-by:
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Andy Lutomirski authored
[ Upstream commit 090edbe2 ] x86_64's saved_context nonsensically used separate idt_limit and idt_base fields and then cast &idt_limit to struct desc_ptr *. This was correct (with -fno-strict-aliasing), but it's confusing, served no purpose, and required #ifdeffery. Simplify this by using struct desc_ptr directly. No change in functionality. Tested-by:
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Andy Lutomirski authored
[ Upstream commit 5b06bbcf ] __restore_processor_context() had a couple of ordering bugs. It restored GSBASE after calling load_gs_index(), and the latter can call into tracing code. It also tried to restore segment registers before restoring the LDT, which is straight-up wrong. Reorder the code so that we restore GSBASE, then the descriptor tables, then the segments. This fixes two bugs. First, it fixes a regression that broke resume under certain configurations due to irqflag tracing in native_load_gs_index(). Second, it fixes resume when the userspace process that initiated suspect had funny segments. The latter can be reproduced by compiling this: // SPDX-License-Identifier: GPL-2.0 /* * ldt_echo.c - Echo argv[1] while using an LDT segment */ int main(int argc, char **argv) { int ret; size_t len; char *buf; const struct user_desc desc = { .entry_number = 0, .base_addr = 0, .limit = 0xfffff, .seg_32bit = 1, .contents = 0, /* Data, grow-up */ .read_exec_only = 0, .limit_in_pages = 1, .seg_not_present = 0, .useable = 0 }; if (argc != 2) errx(1, "Usage: %s STRING", argv[0]); len = asprintf(&buf, "%s\n", argv[1]); if (len < 0) errx(1, "Out of memory"); ret = syscall(SYS_modify_ldt, 1, &desc, sizeof(desc)); if (ret < -1) errno = -ret; if (ret) err(1, "modify_ldt"); asm volatile ("movw %0, %%es" :: "rm" ((unsigned short)7)); write(1, buf, len); return 0; } and running ldt_echo >/sys/power/mem Without the fix, the latter causes a triple fault on resume. Fixes: ca37e57b ("x86/entry/64: Add missing irqflags tracing to native_load_gs_index()") Reported-by:
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Marek Behún authored
Commit c4ba68b8 backported from upstream to 4.14 stable was probably applied wrongly, and instead of calling sfp_register_socket in sfp_probe, the socket registering code was put into sfp_remove. This is obviously wrong. The commit first appeared in 4.14.104. Fix it for the next 4.14 release. Fixes: c4ba68b8 ("net: sfp: do not probe SFP module before we're attached") Cc: stable <stable@vger.kernel.org> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: David S. Miller <davem@davemloft.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Sasha Levin <sashal@kernel.org> Signed-off-by:
Marek Behún <marek.behun@nic.cz> Signed-off-by:
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- 05 Apr, 2019 26 commits
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Greg Kroah-Hartman authored
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Hans de Goede authored
[ Upstream commit d693c008 ] Commit 53fa1f6e ("ACPI / video: Only default only_lcd to true on Win8-ready _desktops_") introduced chassis type detection, limiting the lcd_only check for the backlight to devices where the chassis-type indicates their is no builtin LCD panel. The purpose of the lcd_only check is to avoid advertising a backlight interface on desktops, since skylake and newer machines seem to always have a backlight interface even if there is no LCD panel. The limiting of this check to desktops only was done to avoid breaking backlight support on some laptops which do not have the lcd flag set. The Fujitsu ESPRIMO Q910 which is a compact (NUC like) desktop machine has a chassis type of 0x10 aka "Lunch Box". Without the lcd_only check we end up falsely advertising backlight/brightness control on this device. This commit extend the dmi_is_desktop check to return true for type 0x10 to fix this. Fixes: 53fa1f6e ("ACPI / video: Only default only_lcd to true ...") Signed-off-by:
Hans de Goede <hdegoede@redhat.com> Signed-off-by:
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Ville Syrjälä authored
[ Upstream commit c978ae9b ] We aren't supposed to force a stop+start between every i2c msg when performing multi message transfers. This should eg. cause the DDC segment address to be reset back to 0 between writing the segment address and reading the actual EDID extension block. To quote the E-DDC spec: "... this standard requires that the segment pointer be reset to 00h when a NO ACK or a STOP condition is received." Since we're going to touch this might as well consult the I2C_M_STOP flag to determine whether we want to force the stop or not. Cc: Brian Vincent <brainn@gmail.com> References: https://bugs.freedesktop.org/show_bug.cgi?id=108081Signed-off-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180928180403.22499-1-ville.syrjala@linux.intel.comReviewed-by:
Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Signed-off-by:
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Ben Dooks authored
[ Upstream commit e486df39 ] The dma_desc->bytes_transferred counter tracks the number of bytes moved by the DMA channel. This is then used to calculate the information passed back in the in the tegra_dma_tx_status callback, which is usually fine. When the DMA channel is configured as continous, then the bytes_transferred counter will increase over time and eventually overflow to become negative so the residue count will become invalid and the ALSA sound-dma code will report invalid hardware pointer values to the application. This results in some users becoming confused about the playout position and putting audio data in the wrong place. To fix this issue, always ensure the bytes_transferred field is modulo the size of the request. We only do this for the case of the cyclic transfer done ISR as anyone attempting to move 2GiB of DMA data in one transfer is unlikely. Note, we don't fix the issue that we should /never/ transfer a negative number of bytes so we could make those fields unsigned. Reviewed-by:
Dmitry Osipenko <digetx@gmail.com> Signed-off-by:
Ben Dooks <ben.dooks@codethink.co.uk> Acked-by:
Jon Hunter <jonathanh@nvidia.com> Signed-off-by:
Vinod Koul <vkoul@kernel.org> Signed-off-by:
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Katsuhiro Suzuki authored
[ Upstream commit a0e447b0 ] This patch fixes settings of GPLL frequency in fractional mode for rk3328. In this mode, FOUTVCO is calcurated by following formula: FOUTVCO = FREF * FBDIV / REFDIV + ((FREF * FRAC / REFDIV) >> 24) The problem is in FREF * FRAC >> 24 term. This result always lacks one from target value is specified by rate member. For example first itme of rk3328_pll_frac_rate originally has - rate : 1016064000 - refdiv: 3 - fbdiv : 127 - frac : 134217 - FREF * FBDIV / REFDIV = 1016000000 - (FREF * FRAC / REFDIV) >> 24 = 63999 Thus calculated rate is 1016063999. It seems wrong. If frac has 134218 (it is increased 1 from original value), second term is 64000. All other items have same situation. So this patch adds 1 to frac member in all items of rk3328_pll_frac_rate. Signed-off-by:
Katsuhiro Suzuki <katsuhiro@katsuster.net> Acked-by:
Elaine Zhang <zhangqing@rock-chips.com> Signed-off-by:
Heiko Stuebner <heiko@sntech.de> Signed-off-by:
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Rafael Ávila de Espíndola authored
[ Upstream commit d071ae09 ] Accessing per-CPU variables is done by finding the offset of the variable in the per-CPU block and adding it to the address of the respective CPU's block. Section 3.10.8 of ld.bfd's documentation states: For expressions involving numbers, relative addresses and absolute addresses, ld follows these rules to evaluate terms: Other binary operations, that is, between two relative addresses not in the same section, or between a relative address and an absolute address, first convert any non-absolute term to an absolute address before applying the operator." Note that LLVM's linker does not adhere to the GNU ld's implementation and as such requires implicitly-absolute terms to be explicitly marked as absolute in the linker script. If not, it fails currently with: ld.lld: error: ./arch/x86/kernel/vmlinux.lds:153: at least one side of the expression must be absolute ld.lld: error: ./arch/x86/kernel/vmlinux.lds:154: at least one side of the expression must be absolute Makefile:1040: recipe for target 'vmlinux' failed This is not a functional change for ld.bfd which converts the term to an absolute symbol anyways as specified above. Based on a previous submission by Tri Vo <trong@android.com>. Reported-by:
Rafael Ávila de Espíndola <rafael@espindo.la> [ Update commit message per Boris' and Michael's suggestions. ] Signed-off-by:
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Zumeng Chen authored
[ Upstream commit ba2ffc96 ] Release fw_status, raw_fw_status, and tx_res_if when wl12xx_fetch_firmware failed instead of meaningless goto out to avoid the following memory leak reports(Only the last one listed): unreferenced object 0xc28a9a00 (size 512): comm "kworker/0:4", pid 31298, jiffies 2783204 (age 203.290s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<6624adab>] kmemleak_alloc+0x40/0x74 [<500ddb31>] kmem_cache_alloc_trace+0x1ac/0x270 [<db4d731d>] wl12xx_chip_wakeup+0xc4/0x1fc [wlcore] [<76c5db53>] wl1271_op_add_interface+0x4a4/0x8f4 [wlcore] [<cbf30777>] drv_add_interface+0xa4/0x1a0 [mac80211] [<65bac325>] ieee80211_reconfig+0x9c0/0x1644 [mac80211] [<2817c80e>] ieee80211_restart_work+0x90/0xc8 [mac80211] [<7e1d425a>] process_one_work+0x284/0x42c [<55f9432e>] worker_thread+0x2fc/0x48c [<abb582c6>] kthread+0x148/0x160 [<63144b13>] ret_from_fork+0x14/0x2c [< (null)>] (null) [<1f6e7715>] 0xffffffff Signed-off-by:
Zumeng Chen <zumeng.chen@gmail.com> Signed-off-by:
Kalle Valo <kvalo@codeaurora.org> Signed-off-by:
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Ondrej Mosnacek authored
[ Upstream commit 53e0c2aa ] Ignore all selinux_inode_notifysecctx() calls on mounts with SBLABEL_MNT flag unset. This is achived by returning -EOPNOTSUPP for this case in selinux_inode_setsecurtity() (because that function should not be called in such case anyway) and translating this error to 0 in selinux_inode_notifysecctx(). This fixes behavior of kernfs-based filesystems when mounted with the 'context=' option. Before this patch, if a node's context had been explicitly set to a non-default value and later the filesystem has been remounted with the 'context=' option, then this node would show up as having the manually-set context and not the mount-specified one. Steps to reproduce: # mount -t cgroup2 cgroup2 /sys/fs/cgroup/unified # chcon unconfined_u:object_r:user_home_t:s0 /sys/fs/cgroup/unified/cgroup.stat # ls -lZ /sys/fs/cgroup/unified total 0 -r--r--r--. 1 root root system_u:object_r:cgroup_t:s0 0 Dec 13 10:41 cgroup.controllers -rw-r--r--. 1 root root system_u:object_r:cgroup_t:s0 0 Dec 13 10:41 cgroup.max.depth -rw-r--r--. 1 root root system_u:object_r:cgroup_t:s0 0 Dec 13 10:41 cgroup.max.descendants -rw-r--r--. 1 root root system_u:object_r:cgroup_t:s0 0 Dec 13 10:41 cgroup.procs -r--r--r--. 1 root root unconfined_u:object_r:user_home_t:s0 0 Dec 13 10:41 cgroup.stat -rw-r--r--. 1 root root system_u:object_r:cgroup_t:s0 0 Dec 13 10:41 cgroup.subtree_control -rw-r--r--. 1 root root system_u:object_r:cgroup_t:s0 0 Dec 13 10:41 cgroup.threads # umount /sys/fs/cgroup/unified # mount -o context=system_u:object_r:tmpfs_t:s0 -t cgroup2 cgroup2 /sys/fs/cgroup/unified Result before: # ls -lZ /sys/fs/cgroup/unified total 0 -r--r--r--. 1 root root system_u:object_r:tmpfs_t:s0 0 Dec 13 10:41 cgroup.controllers -rw-r--r--. 1 root root system_u:object_r:tmpfs_t:s0 0 Dec 13 10:41 cgroup.max.depth -rw-r--r--. 1 root root system_u:object_r:tmpfs_t:s0 0 Dec 13 10:41 cgroup.max.descendants -rw-r--r--. 1 root root system_u:object_r:tmpfs_t:s0 0 Dec 13 10:41 cgroup.procs -r--r--r--. 1 root root unconfined_u:object_r:user_home_t:s0 0 Dec 13 10:41 cgroup.stat -rw-r--r--. 1 root root system_u:object_r:tmpfs_t:s0 0 Dec 13 10:41 cgroup.subtree_control -rw-r--r--. 1 root root system_u:object_r:tmpfs_t:s0 0 Dec 13 10:41 cgroup.threads Result after: # ls -lZ /sys/fs/cgroup/unified total 0 -r--r--r--. 1 root root system_u:object_r:tmpfs_t:s0 0 Dec 13 10:41 cgroup.controllers -rw-r--r--. 1 root root system_u:object_r:tmpfs_t:s0 0 Dec 13 10:41 cgroup.max.depth -rw-r--r--. 1 root root system_u:object_r:tmpfs_t:s0 0 Dec 13 10:41 cgroup.max.descendants -rw-r--r--. 1 root root system_u:object_r:tmpfs_t:s0 0 Dec 13 10:41 cgroup.procs -r--r--r--. 1 root root system_u:object_r:tmpfs_t:s0 0 Dec 13 10:41 cgroup.stat -rw-r--r--. 1 root root system_u:object_r:tmpfs_t:s0 0 Dec 13 10:41 cgroup.subtree_control -rw-r--r--. 1 root root system_u:object_r:tmpfs_t:s0 0 Dec 13 10:41 cgroup.threads Signed-off-by:
Ondrej Mosnacek <omosnace@redhat.com> Reviewed-by:
Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by:
Paul Moore <paul@paul-moore.com> Signed-off-by:
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George Rimar authored
[ Upstream commit 927185c1 ] The kernel uses the OUTPUT_FORMAT linker script command in it's linker scripts. Most of the time, the -m option is passed to the linker with correct architecture, but sometimes (at least for x86_64) the -m option contradicts the OUTPUT_FORMAT directive. Specifically, arch/x86/boot and arch/x86/realmode/rm produce i386 object files, but are linked with the -m elf_x86_64 linker flag when building for x86_64. The GNU linker manpage doesn't explicitly state any tie-breakers between -m and OUTPUT_FORMAT. But with BFD and Gold linkers, OUTPUT_FORMAT overrides the emulation value specified with the -m option. LLVM lld has a different behavior, however. When supplied with contradicting -m and OUTPUT_FORMAT values it fails with the following error message: ld.lld: error: arch/x86/realmode/rm/header.o is incompatible with elf_x86_64 Therefore, just add the correct -m after the incorrect one (it overrides it), so the linker invocation looks like this: ld -m elf_x86_64 -z max-page-size=0x200000 -m elf_i386 --emit-relocs -T \ realmode.lds header.o trampoline_64.o stack.o reboot.o -o realmode.elf This is not a functional change for GNU ld, because (although not explicitly documented) OUTPUT_FORMAT overrides -m EMULATION. Tested by building x86_64 kernel with GNU gcc/ld toolchain and booting it in QEMU. [ bp: massage and clarify text. ] Suggested-by:
George Rimar <grimar@accesssoftek.com> Signed-off-by:
Tri Vo <trong@android.com> Signed-off-by:
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Daniel Vetter authored
[ Upstream commit 934c5b32 ] The correct way for legacy drivers to update properties that need to do a full modeset, is to do a full modeset. Note that we don't need to call the drm_mode_config_internal helper because we're not changing any of the refcounted paramters. v2: Fixup error handling (Ville). Since the old code didn't bother I decided to just delete it instead of adding even more code for just error handling. Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> (v1) Cc: Sean Paul <seanpaul@chromium.org> Signed-off-by:
Daniel Vetter <daniel.vetter@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20181217194303.14397-2-daniel.vetter@ffwll.chSigned-off-by:
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Paul Kocialkowski authored
[ Upstream commit 890880dd ] When drivers pass non-empty lists of modifiers for initializing their planes, we can infer that they allow framebuffer modifiers and set the driver's allow_fb_modifiers mode config element. In case the allow_fb_modifiers element was not set (some drivers tend to set them after registering planes), the modifiers will still be registered but won't be available to userspace unless the flag is set later. However in that case, the IN_FORMATS blob won't be created. In order to avoid this case and generally reduce the trouble associated with the flag, always set allow_fb_modifiers when a non-empty list of format modifiers is passed at plane init. Reviewed-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by:
Paul Kocialkowski <paul.kocialkowski@bootlin.com> Signed-off-by:
Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190104085610.5829-1-paul.kocialkowski@bootlin.comSigned-off-by:
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Axel Lin authored
[ Upstream commit f01a7beb ] The act8600_sudcdc_voltage_ranges setting does not match the datasheet. The problems in below entry: REGULATOR_LINEAR_RANGE(19000000, 191, 255, 400000), 1. The off-by-one min_sel causes wrong volatage calculation. The min_sel should be 192. 2. According to the datasheet[1] Table 7. (on page 43): The selector 248 (0b11111000) ~ 255 (0b11111111) are 41.400V. Also fix off-by-one for ACT8600_SUDCDC_VOLTAGE_NUM. [1] https://active-semi.com/wp-content/uploads/ACT8600_Datasheet.pdf Fixes: df3a950e ("regulator: act8865: Add act8600 support") Signed-off-by:
Axel Lin <axel.lin@ingics.com> Signed-off-by:
Mark Brown <broonie@kernel.org> Signed-off-by:
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Pawe? Chmiel authored
[ Upstream commit 49710c32 ] Previously when doing format enumeration, it was returning all formats supported by driver, even if they're not supported by hw. Add missing check for fmt_ver_flag, so it'll be fixed and only those supported by hw will be returned. Similar thing is already done in s5p_jpeg_find_format. It was found by using v4l2-compliance tool and checking result of VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS test and using v4l2-ctl to get list of all supported formats. Tested on s5pv210-galaxys (Samsung i9000 phone). Fixes: bb677f3a ("[media] Exynos4 JPEG codec v4l2 driver") Signed-off-by:
Pawe? Chmiel <pawel.mikolaj.chmiel@gmail.com> Reviewed-by:
Jacek Anaszewski <jacek.anaszewski@gmail.com> [hverkuil-cisco@xs4all.nl: fix a few alignment issues] Signed-off-by:
Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Signed-off-by:
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Florian Westphal authored
[ Upstream commit 8e2f311a ] Following command: iptables -D FORWARD -m physdev ... causes connectivity loss in some setups. Reason is that iptables userspace will probe kernel for the module revision of the physdev patch, and physdev has an artificial dependency on br_netfilter (xt_physdev use makes no sense unless a br_netfilter module is loaded). This causes the "phydev" module to be loaded, which in turn enables the "call-iptables" infrastructure. bridged packets might then get dropped by the iptables ruleset. The better fix would be to change the "call-iptables" defaults to 0 and enforce explicit setting to 1, but that breaks backwards compatibility. This does the next best thing: add a request_module call to checkentry. This was a stray '-D ... -m physdev' won't activate br_netfilter anymore. Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by:
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Shunyong Yang authored
[ Upstream commit 875aac8a ] In async_tx_test_ack(), it uses flags in struct dma_async_tx_descriptor to check the ACK status. As hidma reuses the descriptor in a free list when hidma_prep_dma_*(memcpy/memset) is called, the flag will keep ACKed if the descriptor has been used before. This will cause a BUG_ON in async_tx_quiesce(). kernel BUG at crypto/async_tx/async_tx.c:282! Internal error: Oops - BUG: 0 1 SMP ... task: ffff8017dd3ec000 task.stack: ffff8017dd3e8000 PC is at async_tx_quiesce+0x54/0x78 [async_tx] LR is at async_trigger_callback+0x98/0x110 [async_tx] This patch initializes flags in dma_async_tx_descriptor by the flags passed from the caller when hidma_prep_dma_*(memcpy/memset) is called. Cc: Joey Zheng <yu.zheng@hxt-semitech.com> Reviewed-by:
Sinan Kaya <okaya@kernel.org> Signed-off-by:
Shunyong Yang <shunyong.yang@hxt-semitech.com> Signed-off-by:
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Shunyong Yang authored
[ Upstream commit 546c0547 ] When dma_cookie_complete() is called in hidma_process_completed(), dma_cookie_status() will return DMA_COMPLETE in hidma_tx_status(). Then, hidma_txn_is_success() will be called to use channel cookie mchan->last_success to do additional DMA status check. Current code assigns mchan->last_success after dma_cookie_complete(). This causes a race condition of dma_cookie_status() returns DMA_COMPLETE before mchan->last_success is assigned correctly. The race will cause hidma_tx_status() return DMA_ERROR but the transaction is actually a success. Moreover, in async_tx case, it will cause a timeout panic in async_tx_quiesce(). Kernel panic - not syncing: async_tx_quiesce: DMA error waiting for transaction ... Call trace: [<ffff000008089994>] dump_backtrace+0x0/0x1f4 [<ffff000008089bac>] show_stack+0x24/0x2c [<ffff00000891e198>] dump_stack+0x84/0xa8 [<ffff0000080da544>] panic+0x12c/0x29c [<ffff0000045d0334>] async_tx_quiesce+0xa4/0xc8 [async_tx] [<ffff0000045d03c8>] async_trigger_callback+0x70/0x1c0 [async_tx] [<ffff0000048b7d74>] raid_run_ops+0x86c/0x1540 [raid456] [<ffff0000048bd084>] handle_stripe+0x5e8/0x1c7c [raid456] [<ffff0000048be9ec>] handle_active_stripes.isra.45+0x2d4/0x550 [raid456] [<ffff0000048beff4>] raid5d+0x38c/0x5d0 [raid456] [<ffff000008736538>] md_thread+0x108/0x168 [<ffff0000080fb1cc>] kthread+0x10c/0x138 [<ffff000008084d34>] ret_from_fork+0x10/0x18 Cc: Joey Zheng <yu.zheng@hxt-semitech.com> Reviewed-by:
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Anders Roxell authored
[ Upstream commit 9227ab56 ] The warning got introduced by commit 930507c1 ("arm64: add basic Kconfig symbols for i.MX8"). Since it got enabled for arm64. The warning haven't been seen before since size_t was 'unsigned int' when built on arm32. ../drivers/dma/imx-dma.c: In function ‘imxdma_sg_next’: ../include/linux/kernel.h:846:29: warning: comparison of distinct pointer types lacks a cast (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1))) ^~ ../include/linux/kernel.h:860:4: note: in expansion of macro ‘__typecheck’ (__typecheck(x, y) && __no_side_effects(x, y)) ^~~~~~~~~~~ ../include/linux/kernel.h:870:24: note: in expansion of macro ‘__safe_cmp’ __builtin_choose_expr(__safe_cmp(x, y), \ ^~~~~~~~~~ ../include/linux/kernel.h:879:19: note: in expansion of macro ‘__careful_cmp’ #define min(x, y) __careful_cmp(x, y, <) ^~~~~~~~~~~~~ ../drivers/dma/imx-dma.c:288:8: note: in expansion of macro ‘min’ now = min(d->len, sg_dma_len(sg)); ^~~ Rework so that we use min_t and pass in the size_t that returns the minimum of two values, using the specified type. Signed-off-by:
Anders Roxell <anders.roxell@linaro.org> Acked-by:
Olof Johansson <olof@lixom.net> Reviewed-by:
Fabio Estevam <festevam@gmail.com> Signed-off-by:
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Valentin Schneider authored
[ Upstream commit ce48c457 ] Since we've had: commit cb538267 ("jump_label/lockdep: Assert we hold the hotplug lock for _cpuslocked() operations") we've been getting some lockdep warnings during init, such as on HiKey960: [ 0.820495] WARNING: CPU: 4 PID: 0 at kernel/cpu.c:316 lockdep_assert_cpus_held+0x3c/0x48 [ 0.820498] Modules linked in: [ 0.820509] CPU: 4 PID: 0 Comm: swapper/4 Tainted: G S 4.20.0-rc5-00051-g4cae42a #34 [ 0.820511] Hardware name: HiKey960 (DT) [ 0.820516] pstate: 600001c5 (nZCv dAIF -PAN -UAO) [ 0.820520] pc : lockdep_assert_cpus_held+0x3c/0x48 [ 0.820523] lr : lockdep_assert_cpus_held+0x38/0x48 [ 0.820526] sp : ffff00000a9cbe50 [ 0.820528] x29: ffff00000a9cbe50 x28: 0000000000000000 [ 0.820533] x27: 00008000b69e5000 x26: ffff8000bff4cfe0 [ 0.820537] x25: ffff000008ba69e0 x24: 0000000000000001 [ 0.820541] x23: ffff000008fce000 x22: ffff000008ba70c8 [ 0.820545] x21: 0000000000000001 x20: 0000000000000003 [ 0.820548] x19: ffff00000a35d628 x18: ffffffffffffffff [ 0.820552] x17: 0000000000000000 x16: 0000000000000000 [ 0.820556] x15: ffff00000958f848 x14: 455f3052464d4d34 [ 0.820559] x13: 00000000769dde98 x12: ffff8000bf3f65a8 [ 0.820564] x11: 0000000000000000 x10: ffff00000958f848 [ 0.820567] x9 : ffff000009592000 x8 : ffff00000958f848 [ 0.820571] x7 : ffff00000818ffa0 x6 : 0000000000000000 [ 0.820574] x5 : 0000000000000000 x4 : 0000000000000001 [ 0.820578] x3 : 0000000000000000 x2 : 0000000000000001 [ 0.820582] x1 : 00000000ffffffff x0 : 0000000000000000 [ 0.820587] Call trace: [ 0.820591] lockdep_assert_cpus_held+0x3c/0x48 [ 0.820598] static_key_enable_cpuslocked+0x28/0xd0 [ 0.820606] arch_timer_check_ool_workaround+0xe8/0x228 [ 0.820610] arch_timer_starting_cpu+0xe4/0x2d8 [ 0.820615] cpuhp_invoke_callback+0xe8/0xd08 [ 0.820619] notify_cpu_starting+0x80/0xb8 [ 0.820625] secondary_start_kernel+0x118/0x1d0 We've also had a similar warning in sched_init_smp() for every asymmetric system that would enable the sched_asym_cpucapacity static key, although that was singled out in: commit 40fa3780 ("sched/core: Take the hotplug lock in sched_init_smp()") Those warnings are actually harmless, since we cannot have hotplug operations at the time they appear. Instead of starting to sprinkle useless hotplug lock operations in the init codepaths, mute the warnings until they start warning about real problems. Suggested-by:
Peter Zijlstra <peterz@infradead.org> Signed-off-by:
Valentin Schneider <valentin.schneider@arm.com> Signed-off-by:
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Buland Singh authored
[ Upstream commit 24d48a61 ] Commit '3d035f58 ("drivers/char/hpet.c: allow user controlled mmap for user processes")' introduced a new kernel command line parameter hpet_mmap, that is required to expose the memory map of the HPET registers to user-space. Unfortunately the kernel command line parameter 'hpet_mmap' is broken and never takes effect due to missing '=' character in the __setup() code of hpet_mmap_enable. Before this patch: dmesg output with the kernel command line parameter hpet_mmap=1 [ 0.204152] HPET mmap disabled dmesg output with the kernel command line parameter hpet_mmap=0 [ 0.204192] HPET mmap disabled After this patch: dmesg output with the kernel command line parameter hpet_mmap=1 [ 0.203945] HPET mmap enabled dmesg output with the kernel command line parameter hpet_mmap=0 [ 0.204652] HPET mmap disabled Fixes: 3d035f58 ("drivers/char/hpet.c: allow user controlled mmap for user processes") Signed-off-by:
Buland Singh <bsingh@redhat.com> Signed-off-by:
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Song Hongyan authored
[ Upstream commit 2edefc05 ] Host driver should handle interrupt mask register earlier than wake up ish FW else there will be conditions when FW interrupt comes, host PIMR register still not set ready, so move the interrupt mask setting before ish_wakeup. Clear PISR busy_clear bit in ish_irq_handler. If not clear, there will be conditions host driver received a busy_clear interrupt (before the busy_clear mask bit is ready), it will return IRQ_NONE after check_generated_interrupt, the interrupt will never be cleared, causing the DEVICE not sending following IRQ. Since PISR clear should not be called for the CHV device we do this change. After the change, both ISH2HOST interrupt and busy_clear interrupt will be considered as interrupt from ISH, busy_clear interrupt will return IRQ_HANDLED from IPC_IS_BUSY check. Signed-off-by:
Song Hongyan <hongyan.song@intel.com> Acked-by:
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by:
Jiri Kosina <jkosina@suse.cz> Signed-off-by:
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Timo Alho authored
[ Upstream commit 51294bf6 ] On cases where device tree entries for fuse and clock provider are in different order, fuse driver needs to defer probing. This leads to freeing incorrect IO base address as the fuse->base variable gets overwritten once during first probe invocation. This leads to the following spew during boot: [ 3.082285] Trying to vfree() nonexistent vm area (00000000cfe8fd94) [ 3.082308] WARNING: CPU: 5 PID: 126 at /hdd/l4t/kernel/stable/mm/vmalloc.c:1511 __vunmap+0xcc/0xd8 [ 3.082318] Modules linked in: [ 3.082330] CPU: 5 PID: 126 Comm: kworker/5:1 Tainted: G S 4.19.7-tegra-gce119d3 #1 [ 3.082340] Hardware name: quill (DT) [ 3.082353] Workqueue: events deferred_probe_work_func [ 3.082364] pstate: 40000005 (nZcv daif -PAN -UAO) [ 3.082372] pc : __vunmap+0xcc/0xd8 [ 3.082379] lr : __vunmap+0xcc/0xd8 [ 3.082385] sp : ffff00000a1d3b60 [ 3.082391] x29: ffff00000a1d3b60 x28: 0000000000000000 [ 3.082402] x27: 0000000000000000 x26: ffff000008e8b610 [ 3.082413] x25: 0000000000000000 x24: 0000000000000009 [ 3.082423] x23: ffff000009221a90 x22: ffff000009f6d000 [ 3.082432] x21: 0000000000000000 x20: 0000000000000000 [ 3.082442] x19: ffff000009f6d000 x18: ffffffffffffffff [ 3.082452] x17: 0000000000000000 x16: 0000000000000000 [ 3.082462] x15: ffff0000091396c8 x14: 0720072007200720 [ 3.082471] x13: 0720072007200720 x12: 0720072907340739 [ 3.082481] x11: 0764076607380765 x10: 0766076307300730 [ 3.082491] x9 : 0730073007300730 x8 : 0730073007280720 [ 3.082501] x7 : 0761076507720761 x6 : 0000000000000102 [ 3.082510] x5 : 0000000000000000 x4 : 0000000000000000 [ 3.082519] x3 : ffffffffffffffff x2 : ffff000009150ff8 [ 3.082528] x1 : 3d95b1429fff5200 x0 : 0000000000000000 [ 3.082538] Call trace: [ 3.082545] __vunmap+0xcc/0xd8 [ 3.082552] vunmap+0x24/0x30 [ 3.082561] __iounmap+0x2c/0x38 [ 3.082569] tegra_fuse_probe+0xc8/0x118 [ 3.082577] platform_drv_probe+0x50/0xa0 [ 3.082585] really_probe+0x1b0/0x288 [ 3.082593] driver_probe_device+0x58/0x100 [ 3.082601] __device_attach_driver+0x98/0xf0 [ 3.082609] bus_for_each_drv+0x64/0xc8 [ 3.082616] __device_attach+0xd8/0x130 [ 3.082624] device_initial_probe+0x10/0x18 [ 3.082631] bus_probe_device+0x90/0x98 [ 3.082638] deferred_probe_work_func+0x74/0xb0 [ 3.082649] process_one_work+0x1e0/0x318 [ 3.082656] worker_thread+0x228/0x450 [ 3.082664] kthread+0x128/0x130 [ 3.082672] ret_from_fork+0x10/0x18 [ 3.082678] ---[ end trace 0810fe6ba772c1c7 ]--- Fix this by retaining the value of fuse->base until driver has successfully probed. Signed-off-by:
Timo Alho <talho@nvidia.com> Acked-by:
Thierry Reding <treding@nvidia.com> Signed-off-by:
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David Tolnay authored
[ Upstream commit aef027db ] The virtio-rng driver uses a completion called have_data to wait for a virtio read to be fulfilled by the hypervisor. The completion is reset before placing a buffer on the virtio queue and completed by the virtio callback once data has been written into the buffer. Prior to this commit, the driver called init_completion on this completion both during probe as well as when registering virtio buffers as part of a hwrng read operation. The second of these init_completion calls should instead be reinit_completion because the have_data completion has already been inited by probe. As described in Documentation/scheduler/completion.txt, "Calling init_completion() twice on the same completion object is most likely a bug". This bug was present in the initial implementation of virtio-rng in f7f510ec ("virtio: An entropy device, as suggested by hpa"). Back then the have_data completion was a single static completion rather than a member of one of potentially multiple virtrng_info structs as implemented later by 08e53fbd ("virtio-rng: support multiple virtio-rng devices"). The original driver incorrectly used init_completion rather than INIT_COMPLETION to reset have_data during read. Tested by running `head -c48 /dev/random | hexdump` within crosvm, the Chrome OS virtual machine monitor, and confirming that the virtio-rng driver successfully produces random bytes from the host. Signed-off-by:
David Tolnay <dtolnay@gmail.com> Tested-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Akinobu Mita authored
[ Upstream commit 29856308 ] This driver sets initial frame width and height to 0x0, which is invalid. So set it to selection rectangle bounds instead. This is detected by v4l2-compliance detected. Cc: Enrico Scholz <enrico.scholz@sigma-chemnitz.de> Cc: Michael Grzeschik <m.grzeschik@pengutronix.de> Cc: Marco Felsch <m.felsch@pengutronix.de> Signed-off-by:
Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by:
Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by:
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Roger Quadros authored
[ Upstream commit 169e3b68 ] On v3.10a in dual-role mode, if port is in device mode and gadget driver isn't loaded, the OTG event interrupts don't come through. It seems that if the core is configured to be OTG2.0 only, then we can't leave the DCFG.DEVSPD at Super-speed (default) if we expect OTG to work properly. It must be set to High-speed. Fix this issue by configuring DCFG.DEVSPD to the supported maximum speed at gadget init. Device tree still needs to provide correct supported maximum speed for this to work. This issue wasn't present on v2.40a but is seen on v3.10a. It doesn't cause any side effects on v2.40a. Signed-off-by:
Roger Quadros <rogerq@ti.com> Signed-off-by:
Sekhar Nori <nsekhar@ti.com> Signed-off-by:
Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by:
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Nathan Fontenot authored
[ Upstream commit 81b61324 ] On pseries systems, performing a partition migration can result in altering the nodes a CPU is assigned to on the destination system. For exampl, pre-migration on the source system CPUs are in node 1 and 3, post-migration on the destination system CPUs are in nodes 2 and 3. Handling the node change for a CPU can cause corruption in the slab cache if we hit a timing where a CPUs node is changed while cache_reap() is invoked. The corruption occurs because the slab cache code appears to rely on the CPU and slab cache pages being on the same node. The current dynamic updating of a CPUs node done in arch/powerpc/mm/numa.c does not prevent us from hitting this scenario. Changing the device tree property update notification handler that recognizes an affinity change for a CPU to do a full DLPAR remove and add of the CPU instead of dynamically changing its node resolves this issue. Signed-off-by:
Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by:
Michael W. Bringmann <mwb@linux.vnet.ibm.com> Tested-by:
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Manfred Schlaegl authored
[ Upstream commit 7ab57b76 ] We increase the default limit for buffer memory allocation by a factor of 10 to 640K to prevent data loss when using fast serial interfaces. For example when using RS485 without flow-control at speeds of 1Mbit/s an upwards we've run into problems such as applications being too slow to read out this buffer (on embedded devices based on imx53 or imx6). If you want to write transmitted data to a slow SD card and thus have realtime requirements, this limit can become a problem. That shouldn't be the case and 640K buffers fix such problems for us. This value is a maximum limit for allocation only. It has no effect on systems that currently run fine. When transmission is slow enough applications and hardware can keep up and increasing this limit doesn't change anything. It only _allows_ to allocate more than 2*64K in cases we currently fail to allocate memory despite having some. Signed-off-by:
Manfred Schlaegl <manfred.schlaegl@ginzinger.com> Signed-off-by:
Martin Kepplinger <martin.kepplinger@ginzinger.com> Signed-off-by:
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