- 30 Mar, 2017 40 commits
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Dmitry Torokhov authored
commit abda288b upstream. The OF device table must be terminated, otherwise we'll be walking past it and into areas unknown. Fixes: 0cad855f ("auxdisplay: img-ascii-lcd: driver for simple ASCII...") Signed-off-by:
Dmitry Torokhov <dmitry.torokhov@gmail.com> Tested-by:
Fengguang Wu <fengguang.wu@intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Alex Deucher authored
commit e11ddff6 upstream. Higher sclks seem to be unstable on some boards. bug: https://bugs.freedesktop.org/show_bug.cgi?id=100222Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
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Ming Lei authored
commit 95a49603 upstream. When iterating busy requests in timeout handler, if the STARTED flag of one request isn't set, that means the request is being processed in block layer or driver, and isn't submitted to hardware yet. In current implementation of blk_mq_check_expired(), if the request queue becomes dying, un-started requests are handled as being completed/freed immediately. This way is wrong, and can cause rq corruption or double allocation[1][2], when doing I/O and removing&resetting NVMe device at the sametime. This patch fixes several issues reported by Yi Zhang. [1]. oops log 1 [ 581.789754] ------------[ cut here ]------------ [ 581.789758] kernel BUG at block/blk-mq.c:374! [ 581.789760] invalid opcode: 0000 [#1] SMP [ 581.789761] Modules linked in: vfat fat ipmi_ssif intel_rapl sb_edac edac_core x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm nvme irqbypass crct10dif_pclmul nvme_core crc32_pclmul ghash_clmulni_intel intel_cstate ipmi_si mei_me ipmi_devintf intel_uncore sg ipmi_msghandler intel_rapl_perf iTCO_wdt mei iTCO_vendor_support mxm_wmi lpc_ich dcdbas shpchp pcspkr acpi_power_meter wmi nfsd auth_rpcgss nfs_acl lockd dm_multipath grace sunrpc ip_tables xfs libcrc32c sd_mod mgag200 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm ahci libahci crc32c_intel tg3 libata megaraid_sas i2c_core ptp fjes pps_core dm_mirror dm_region_hash dm_log dm_mod [ 581.789796] CPU: 1 PID: 1617 Comm: kworker/1:1H Not tainted 4.10.0.bz1420297+ #4 [ 581.789797] Hardware name: Dell Inc. PowerEdge R730xd/072T6D, BIOS 2.2.5 09/06/2016 [ 581.789804] Workqueue: kblockd blk_mq_timeout_work [ 581.789806] task: ffff8804721c8000 task.stack: ffffc90006ee4000 [ 581.789809] RIP: 0010:blk_mq_end_request+0x58/0x70 [ 581.789810] RSP: 0018:ffffc90006ee7d50 EFLAGS: 00010202 [ 581.789811] RAX: 0000000000000001 RBX: ffff8802e4195340 RCX: ffff88028e2f4b88 [ 581.789812] RDX: 0000000000001000 RSI: 0000000000001000 RDI: 0000000000000000 [ 581.789813] RBP: ffffc90006ee7d60 R08: 0000000000000003 R09: ffff88028e2f4b00 [ 581.789814] R10: 0000000000001000 R11: 0000000000000001 R12: 00000000fffffffb [ 581.789815] R13: ffff88042abe5780 R14: 000000000000002d R15: ffff88046fbdff80 [ 581.789817] FS: 0000000000000000(0000) GS:ffff88047fc00000(0000) knlGS:0000000000000000 [ 581.789818] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 581.789819] CR2: 00007f64f403a008 CR3: 000000014d078000 CR4: 00000000001406e0 [ 581.789820] Call Trace: [ 581.789825] blk_mq_check_expired+0x76/0x80 [ 581.789828] bt_iter+0x45/0x50 [ 581.789830] blk_mq_queue_tag_busy_iter+0xdd/0x1f0 [ 581.789832] ? blk_mq_rq_timed_out+0x70/0x70 [ 581.789833] ? blk_mq_rq_timed_out+0x70/0x70 [ 581.789840] ? __switch_to+0x140/0x450 [ 581.789841] blk_mq_timeout_work+0x88/0x170 [ 581.789845] process_one_work+0x165/0x410 [ 581.789847] worker_thread+0x137/0x4c0 [ 581.789851] kthread+0x101/0x140 [ 581.789853] ? rescuer_thread+0x3b0/0x3b0 [ 581.789855] ? kthread_park+0x90/0x90 [ 581.789860] ret_from_fork+0x2c/0x40 [ 581.789861] Code: 48 85 c0 74 0d 44 89 e6 48 89 df ff d0 5b 41 5c 5d c3 48 8b bb 70 01 00 00 48 85 ff 75 0f 48 89 df e8 7d f0 ff ff 5b 41 5c 5d c3 <0f> 0b e8 71 f0 ff ff 90 eb e9 0f 1f 40 00 66 2e 0f 1f 84 00 00 [ 581.789882] RIP: blk_mq_end_request+0x58/0x70 RSP: ffffc90006ee7d50 [ 581.789889] ---[ end trace bcaf03d9a14a0a70 ]--- [2]. oops log2 [ 6984.857362] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 [ 6984.857372] IP: nvme_queue_rq+0x6e6/0x8cd [nvme] [ 6984.857373] PGD 0 [ 6984.857374] [ 6984.857376] Oops: 0000 [#1] SMP [ 6984.857379] Modules linked in: ipmi_ssif vfat fat intel_rapl sb_edac edac_core x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel ipmi_si iTCO_wdt iTCO_vendor_support mxm_wmi ipmi_devintf intel_cstate sg dcdbas intel_uncore mei_me intel_rapl_perf mei pcspkr lpc_ich ipmi_msghandler shpchp acpi_power_meter wmi nfsd auth_rpcgss dm_multipath nfs_acl lockd grace sunrpc ip_tables xfs libcrc32c sd_mod mgag200 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect crc32c_intel sysimgblt fb_sys_fops ttm nvme drm nvme_core ahci libahci i2c_core tg3 libata ptp megaraid_sas pps_core fjes dm_mirror dm_region_hash dm_log dm_mod [ 6984.857416] CPU: 7 PID: 1635 Comm: kworker/7:1H Not tainted 4.10.0-2.el7.bz1420297.x86_64 #1 [ 6984.857417] Hardware name: Dell Inc. PowerEdge R730xd/072T6D, BIOS 2.2.5 09/06/2016 [ 6984.857427] Workqueue: kblockd blk_mq_run_work_fn [ 6984.857429] task: ffff880476e3da00 task.stack: ffffc90002e90000 [ 6984.857432] RIP: 0010:nvme_queue_rq+0x6e6/0x8cd [nvme] [ 6984.857433] RSP: 0018:ffffc90002e93c50 EFLAGS: 00010246 [ 6984.857434] RAX: 0000000000000000 RBX: ffff880275646600 RCX: 0000000000001000 [ 6984.857435] RDX: 0000000000000fff RSI: 00000002fba2a000 RDI: ffff8804734e6950 [ 6984.857436] RBP: ffffc90002e93d30 R08: 0000000000002000 R09: 0000000000001000 [ 6984.857437] R10: 0000000000001000 R11: 0000000000000000 R12: ffff8804741d8000 [ 6984.857438] R13: 0000000000000040 R14: ffff880475649f80 R15: ffff8804734e6780 [ 6984.857439] FS: 0000000000000000(0000) GS:ffff88047fcc0000(0000) knlGS:0000000000000000 [ 6984.857440] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 6984.857442] CR2: 0000000000000010 CR3: 0000000001c09000 CR4: 00000000001406e0 [ 6984.857443] Call Trace: [ 6984.857451] ? mempool_free+0x2b/0x80 [ 6984.857455] ? bio_free+0x4e/0x60 [ 6984.857459] blk_mq_dispatch_rq_list+0xf5/0x230 [ 6984.857462] blk_mq_process_rq_list+0x133/0x170 [ 6984.857465] __blk_mq_run_hw_queue+0x8c/0xa0 [ 6984.857467] blk_mq_run_work_fn+0x12/0x20 [ 6984.857473] process_one_work+0x165/0x410 [ 6984.857475] worker_thread+0x137/0x4c0 [ 6984.857478] kthread+0x101/0x140 [ 6984.857480] ? rescuer_thread+0x3b0/0x3b0 [ 6984.857481] ? kthread_park+0x90/0x90 [ 6984.857489] ret_from_fork+0x2c/0x40 [ 6984.857490] Code: 8b bd 70 ff ff ff 89 95 50 ff ff ff 89 8d 58 ff ff ff 44 89 95 60 ff ff ff e8 b7 dd 12 e1 8b 95 50 ff ff ff 48 89 85 68 ff ff ff <4c> 8b 48 10 44 8b 58 18 8b 8d 58 ff ff ff 44 8b 95 60 ff ff ff [ 6984.857511] RIP: nvme_queue_rq+0x6e6/0x8cd [nvme] RSP: ffffc90002e93c50 [ 6984.857512] CR2: 0000000000000010 [ 6984.895359] ---[ end trace 2d7ceb528432bf83 ]--- Reported-by:
Yi Zhang <yizhan@redhat.com> Tested-by:
Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by:
Hannes Reinecke <hare@suse.com> Signed-off-by:
Ming Lei <tom.leiming@gmail.com> Signed-off-by:
Jens Axboe <axboe@fb.com> Signed-off-by:
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Tejun Heo authored
commit a05d4fd9 upstream. The net_cls controller controls the classid field of each socket which is associated with the cgroup. Because the classid is per-socket attribute, when a task migrates to another cgroup or the configured classid of the cgroup changes, the controller needs to walk all sockets and update the classid value, which was implemented by 3b13758f ("cgroups: Allow dynamically changing net_classid"). While the approach is not scalable, migrating tasks which have a lot of fds attached to them is rare and the cost is born by the ones initiating the operations. However, for simplicity, both the migration and classid config change paths call update_classid() which scans all fds of all tasks in the target css. This is an overkill for the migration path which only needs to cover a much smaller subset of tasks which are actually getting migrated in. On cgroup v1, this can lead to unexpected scalability issues when one tries to migrate a task or process into a net_cls cgroup which already contains a lot of fds. Even if the migration traget doesn't have many to get scanned, update_classid() ends up scanning all fds in the target cgroup which can be extremely numerous. Unfortunately, on cgroup v2 which doesn't use net_cls, the problem is even worse. Before bfc2cf6f ("cgroup: call subsys->*attach() only for subsystems which are actually affected by migration"), cgroup core would call the ->css_attach callback even for controllers which don't see actual migration to a different css. As net_cls is always disabled but still mounted on cgroup v2, whenever a process is migrated on the cgroup v2 hierarchy, net_cls sees identity migration from root to root and cgroup core used to call ->css_attach callback for those. The net_cls ->css_attach ends up calling update_classid() on the root net_cls css to which all processes on the system belong to as the controller isn't used. This makes any cgroup v2 migration O(total_number_of_fds_on_the_system) which is horrible and easily leads to noticeable stalls triggering RCU stall warnings and so on. The worst symptom is already fixed in upstream by bfc2cf6f ("cgroup: call subsys->*attach() only for subsystems which are actually affected by migration"); however, backporting that commit is too invasive and we want to avoid other cases too. This patch updates net_cls's cgrp_attach() to iterate fds of only the processes which are actually getting migrated. This removes the surprising migration cost which is dependent on the total number of fds in the target cgroup. As this leaves write_classid() the only user of update_classid(), open-code the helper into write_classid(). Reported-by:
David Goode <dgoode@fb.com> Fixes: 3b13758f ("cgroups: Allow dynamically changing net_classid") Cc: Nina Schiff <ninasc@fb.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Viresh Kumar authored
commit ff010472 upstream. On CPU online the cpufreq core restores the previous governor (or the previous "policy" setting for ->setpolicy drivers), but it does not restore the min/max limits at the same time, which is confusing, inconsistent and real pain for users who set the limits and then suspend/resume the system (using full suspend), in which case the limits are reset on all CPUs except for the boot one. Fix this by making cpufreq_online() restore the limits when an inactive policy is brought online. The commit log and patch are inspired from Rafael's earlier work. Reported-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by:
Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by:
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Neeraj Upadhyay authored
commit afd0e5a8 upstream. If kernel image extends across alignment boundary, existing code increases the KASLR offset by size of kernel image. The offset is masked after resizing. There are cases, where after masking, we may still have kernel image extending across boundary. This eventually results in only 2MB block getting mapped while creating the page tables. This results in data aborts while accessing unmapped regions during second relocation (with kaslr offset) in __primary_switch. To fix this problem, round up the kernel image size, by swapper block size, before adding it for correction. For example consider below case, where kernel image still crosses 1GB alignment boundary, after masking the offset, which is fixed by rounding up kernel image size. SWAPPER_TABLE_SHIFT = 30 Swapper using section maps with section size 2MB. CONFIG_PGTABLE_LEVELS = 3 VA_BITS = 39 _text : 0xffffff8008080000 _end : 0xffffff800aa1b000 offset : 0x1f35600000 mask = ((1UL << (VA_BITS - 2)) - 1) & ~(SZ_2M - 1) (_text + offset) >> SWAPPER_TABLE_SHIFT = 0x3fffffe7c (_end + offset) >> SWAPPER_TABLE_SHIFT = 0x3fffffe7d offset after existing correction (before mask) = 0x1f37f9b000 (_text + offset) >> SWAPPER_TABLE_SHIFT = 0x3fffffe7d (_end + offset) >> SWAPPER_TABLE_SHIFT = 0x3fffffe7d offset (after mask) = 0x1f37e00000 (_text + offset) >> SWAPPER_TABLE_SHIFT = 0x3fffffe7c (_end + offset) >> SWAPPER_TABLE_SHIFT = 0x3fffffe7d new offset w/ rounding up = 0x1f38000000 (_text + offset) >> SWAPPER_TABLE_SHIFT = 0x3fffffe7d (_end + offset) >> SWAPPER_TABLE_SHIFT = 0x3fffffe7d Fixes: f80fb3a3 ("arm64: add support for kernel ASLR") Reviewed-by:
Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by:
Neeraj Upadhyay <neeraju@codeaurora.org> Signed-off-by:
Srinivas Ramana <sramana@codeaurora.org> Signed-off-by:
Will Deacon <will.deacon@arm.com> Signed-off-by:
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Nicolas Ferre authored
commit 60b89f19 upstream. On some DDR controllers, compatible with the sama5d3 one, the sequence to enter/exit/re-enter the self-refresh mode adds more constrains than what is currently written in the at91_idle driver. An actual access to the DDR chip is needed between exit and re-enter of this mode which is somehow difficult to implement. This sequence can completely hang the SoC. It is particularly experienced on parts which embed a L2 cache if the code run between IDLE calls fits in it... Moreover, as the intention is to enter and exit pretty rapidly from IDLE, the power-down mode is a good candidate. So now we use power-down instead of self-refresh. As we can simplify the code for sama5d3 compatible DDR controllers, we instantiate a new sama5d3_ddr_standby() function. Signed-off-by:
Nicolas Ferre <nicolas.ferre@microchip.com> Fixes: 017b5522 ("ARM: at91: Add new binding for sama5d3-ddramc") Signed-off-by:
Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by:
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Romain Izard authored
commit 9e10889a upstream. This reverts commit cab43282 ("ARM: at91/dt: sama5d2: Use new compatible for ohci node") It depends from commit 7150bc9b ("usb: ohci-at91: Forcibly suspend ports while USB suspend") which was reverted and implemented differently. With the new implementation, the compatible string must remain the same. The compatible string introduced by this commit has been used in the default SAMA5D2 dtsi starting from Linux 4.8. As it has never been working correctly in an official release, removing it should not be breaking the stability rules. Fixes: cab43282 ("ARM: at91/dt: sama5d2: Use new compatible for ohci node") Signed-off-by:
Romain Izard <romain.izard.pro@gmail.com> Signed-off-by:
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Koos Vriezen authored
commit 5003ae1e upstream. The function device_to_iommu() in the Intel VT-d driver lacks a NULL-ptr check, resulting in this oops at boot on some platforms: BUG: unable to handle kernel NULL pointer dereference at 00000000000007ab IP: [<ffffffff8132234a>] device_to_iommu+0x11a/0x1a0 PGD 0 [...] Call Trace: ? find_or_alloc_domain.constprop.29+0x1a/0x300 ? dw_dma_probe+0x561/0x580 [dw_dmac_core] ? __get_valid_domain_for_dev+0x39/0x120 ? __intel_map_single+0x138/0x180 ? intel_alloc_coherent+0xb6/0x120 ? sst_hsw_dsp_init+0x173/0x420 [snd_soc_sst_haswell_pcm] ? mutex_lock+0x9/0x30 ? kernfs_add_one+0xdb/0x130 ? devres_add+0x19/0x60 ? hsw_pcm_dev_probe+0x46/0xd0 [snd_soc_sst_haswell_pcm] ? platform_drv_probe+0x30/0x90 ? driver_probe_device+0x1ed/0x2b0 ? __driver_attach+0x8f/0xa0 ? driver_probe_device+0x2b0/0x2b0 ? bus_for_each_dev+0x55/0x90 ? bus_add_driver+0x110/0x210 ? 0xffffffffa11ea000 ? driver_register+0x52/0xc0 ? 0xffffffffa11ea000 ? do_one_initcall+0x32/0x130 ? free_vmap_area_noflush+0x37/0x70 ? kmem_cache_alloc+0x88/0xd0 ? do_init_module+0x51/0x1c4 ? load_module+0x1ee9/0x2430 ? show_taint+0x20/0x20 ? kernel_read_file+0xfd/0x190 ? SyS_finit_module+0xa3/0xb0 ? do_syscall_64+0x4a/0xb0 ? entry_SYSCALL64_slow_path+0x25/0x25 Code: 78 ff ff ff 4d 85 c0 74 ee 49 8b 5a 10 0f b6 9b e0 00 00 00 41 38 98 e0 00 00 00 77 da 0f b6 eb 49 39 a8 88 00 00 00 72 ce eb 8f <41> f6 82 ab 07 00 00 04 0f 85 76 ff ff ff 0f b6 4d 08 88 0e 49 RIP [<ffffffff8132234a>] device_to_iommu+0x11a/0x1a0 RSP <ffffc90001457a78> CR2: 00000000000007ab ---[ end trace 16f974b6d58d0aad ]--- Add the missing pointer check. Fixes: 1c387188 ("iommu/vt-d: Fix IOMMU lookup for SR-IOV Virtual Functions") Signed-off-by:
Koos Vriezen <koos.vriezen@gmail.com> Signed-off-by:
Joerg Roedel <jroedel@suse.de> Signed-off-by:
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Ankur Arora authored
commit 1914f0cd upstream. This was broken in commit cd979883 ("xen/acpi-processor: fix enabling interrupts on syscore_resume"). do_suspend (from xen/manage.c) and thus xen_resume_notifier never get called on the initial-domain at resume (it is if running as guest.) The rationale for the breaking change was that upload_pm_data() potentially does blocking work in syscore_resume(). This patch addresses the original issue by scheduling upload_pm_data() to execute in workqueue context. Cc: Stanislaw Gruszka <sgruszka@redhat.com> Based-on-patch-by:
Konrad Wilk <konrad.wilk@oracle.com> Reviewed-by:
Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by:
Ankur Arora <ankur.a.arora@oracle.com> Signed-off-by:
Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by:
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Gary R Hook authored
commit 7c468447 upstream. The CCP driver generally uses a round-robin approach when assigning operations to available CCPs. For the DMA engine, however, the DMA mappings of the SGs are associated with a specific CCP. When an IOMMU is enabled, the IOMMU is programmed based on this specific device. If the DMA operations are not performed by that specific CCP then addressing errors and I/O page faults will occur. Update the CCP driver to allow a specific CCP device to be requested for an operation and use this in the DMA engine support. Signed-off-by:
Gary R Hook <gary.hook@amd.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Brian Norris authored
commit 4e841d3e upstream. When PCIe FLR support was added, much of the remove/release code for PCIe was migrated to ->down_dev(), but ->down_dev() is never called for device removal. Let's refactor the cleanup to be done in both cases. Also, drop the comments above mwifiex_cleanup_pcie(), because they were clearly wrong, and it's better to have clear and obvious code than to detail the code steps in comments anyway. Fixes: 4c5dae59 ("mwifiex: add PCIe function level reset support") Signed-off-by:
Brian Norris <briannorris@chromium.org> Signed-off-by:
Kalle Valo <kvalo@codeaurora.org> Signed-off-by:
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Chen-Yu Tsai authored
commit ac8616e4 upstream. The MP style clocks support an mux with pre-dividers. While the driver correctly accounted for them in the .determine_rate callback, it did not in the .recalc_rate and .set_rate callbacks. This means when calculating the factors in the .set_rate callback, they would be off by a factor of the active pre-divider. Same goes for reading back the clock rate after it is set. Fixes: 2ab836db ("clk: sunxi-ng: Add M-P factor clock support") Signed-off-by:
Chen-Yu Tsai <wens@csie.org> Signed-off-by:
Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by:
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Chen-Yu Tsai authored
commit 9ad0bb39 upstream. The enable bit offset for the hdmi-ddc module clock is wrong. It is pointing to the main hdmi module clock enable bit. Reported-by:
Bob Ham <rah@settrans.net> Fixes: c6e6c96d ("clk: sunxi-ng: Add A31/A31s clocks") Signed-off-by:
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Prarit Bhargava authored
commit 8c75704e upstream. After commit e9afc746 ("hwrng: geode - Use linux/io.h instead of asm/io.h") the geode-rng driver uses devres with pci_dev->dev to keep track of resources, but does not actually register a PCI driver. This results in the following issues: 1. The driver leaks memory because the driver does not attach to a device. The driver only uses the PCI device as a reference. devm_*() functions will release resources on driver detach, which the geode-rng driver will never do. As a result, 2. The driver cannot be reloaded because there is always a use of the ioport and region after the first load of the driver. Revert the changes made by e9afc746 ("hwrng: geode - Use linux/io.h instead of asm/io.h"). Signed-off-by:
Prarit Bhargava <prarit@redhat.com> Fixes: 6e9b5e76 ("hwrng: geode - Migrate to managed API") Cc: Matt Mackall <mpm@selenic.com> Cc: Corentin LABBE <clabbe.montjoie@gmail.com> Cc: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com> Cc: Wei Yongjun <weiyongjun1@huawei.com> Cc: linux-crypto@vger.kernel.org Cc: linux-geode@lists.infradead.org Signed-off-by:
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Prarit Bhargava authored
commit 69db7009 upstream. After commit 31b2a73c ("hwrng: amd - Migrate to managed API"), the amd-rng driver uses devres with pci_dev->dev to keep track of resources, but does not actually register a PCI driver. This results in the following issues: 1. The message WARNING: CPU: 2 PID: 621 at drivers/base/dd.c:349 driver_probe_device+0x38c is output when the i2c_amd756 driver loads and attempts to register a PCI driver. The PCI & device subsystems assume that no resources have been registered for the device, and the WARN_ON() triggers since amd-rng has already do so. 2. The driver leaks memory because the driver does not attach to a device. The driver only uses the PCI device as a reference. devm_*() functions will release resources on driver detach, which the amd-rng driver will never do. As a result, 3. The driver cannot be reloaded because there is always a use of the ioport and region after the first load of the driver. Revert the changes made by 31b2a73c ("hwrng: amd - Migrate to managed API"). Signed-off-by:
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Adrian Hunter authored
commit 027fb89e upstream. Disabling interrupts for even a millisecond can cause problems for some devices. That can happen when Intel host controllers wait for the present state to propagate. The spin lock is not necessary here. Anything that is racing with changes to the I/O state is already broken. The mmc core already provides synchronization via "claiming" the host. Although the spin lock probably should be removed from the code paths that lead to this point, such a patch would touch too much code to be suitable for stable trees. Consequently, for this patch, just drop the spin lock while waiting. Signed-off-by:
Adrian Hunter <adrian.hunter@intel.com> Signed-off-by:
Ulf Hansson <ulf.hansson@linaro.org> Tested-by:
Ludovic Desroches <ludovic.desroches@microchip.com> Signed-off-by:
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Adrian Hunter authored
commit e2ebfb21 upstream. Disabling interrupts for even a millisecond can cause problems for some devices. That can happen when sdhci changes clock frequency because it waits for the clock to become stable under a spin lock. The spin lock is not necessary here. Anything that is racing with changes to the I/O state is already broken. The mmc core already provides synchronization via "claiming" the host. Although the spin lock probably should be removed from the code paths that lead to this point, such a patch would touch too much code to be suitable for stable trees. Consequently, for this patch, just drop the spin lock while waiting. Signed-off-by:
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Anssi Hannula authored
commit 16681037 upstream. sdhci_arasan_get_timeout_clock() divides the frequency it has with (1 << (13 + divisor)). However, the divisor is not some Arasan-specific value, but instead is just the Data Timeout Counter Value from the SDHCI Timeout Control Register. Applying it here like this is wrong as the sdhci driver already takes that value into account when calculating timeouts, and in fact it *sets* that register value based on how long a timeout is wanted. Additionally, sdhci core interprets the .get_timeout_clock callback return value as if it were read from hardware registers, i.e. the unit should be kHz or MHz depending on SDHCI_TIMEOUT_CLK_UNIT capability bit. This bit is set at least on the tested Zynq-7000 SoC. With the tested hardware (SDHCI_TIMEOUT_CLK_UNIT set) this results in too high a timeout clock rate being reported, causing the core to use longer-than-needed timeouts. Additionally, on a partitioned MMC (therefore having erase_group_def bit set) mmc_calc_max_discard() disables discard support as it looks like controller does not support the long timeouts needed for that. Do not apply the extra divisor and return the timeout clock in the expected unit. Tested with a Zynq-7000 SoC and a partitioned Toshiba THGBMAG5A1JBAWR eMMC card. Signed-off-by:
Anssi Hannula <anssi.hannula@bitwise.fi> Fixes: e3ec3a3d ("mmc: arasan: Add driver for Arasan SDHCI") Signed-off-by:
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Romain Izard authored
commit 2ce0c7b6 upstream. The SDHCI controller in the SAMA5D2 chip requires a valid voltage set in the power control register, otherwise commands will fail with a timeout error. When using the regulator framework to specify the regulator used by the mmc device, the voltage is not configured, and it is not possible to use the connected device. Implement a custom 'set_power' function for this specific hardware, that configures the voltage in the register in all cases. Signed-off-by:
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Nicholas Piggin authored
commit 6d98ce0b upstream. We concluded there may be a window where the idle wakeup code could get to pnv_wakeup_tb_loss() (which clobbers non-volatile GPRs), but the hardware may set SRR1[46:47] to 01b (no state loss) which would result in the wakeup code failing to restore non-volatile GPRs. I was not able to trigger this condition with trivial tests on real hardware or simulator, but the ISA (at least 2.07) seems to allow for it, and Gautham says that it can happen if there is an exception pending when the sleep/winkle instruction is executed. Fixes: 17065671 ("powerpc/kvm: make hypervisor state restore a function") Signed-off-by:
Nicholas Piggin <npiggin@gmail.com> Acked-by:
Gautham R. Shenoy <ego@linux.vnet.ibm.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
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Theodore Ts'o authored
commit dac7a4b4 upstream. We must lock the xattr block before calculating or verifying the checksum in order to avoid spurious checksum failures. https://bugzilla.kernel.org/show_bug.cgi?id=193661Reported-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Signed-off-by:
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Eric Biggers authored
commit b9cf625d upstream. If ext4_convert_inline_data() was called on a directory with inline data, the filesystem was left in an inconsistent state (as considered by e2fsck) because the file size was not increased to cover the new block. This happened because the inode was not marked dirty after i_disksize was updated. Fix this by marking the inode dirty at the end of ext4_finish_convert_inline_dir(). This bug was probably not noticed before because most users mark the inode dirty afterwards for other reasons. But if userspace executed FS_IOC_SET_ENCRYPTION_POLICY with invalid parameters, as exercised by 'kvm-xfstests -c adv generic/396', then the inode was never marked dirty after updating i_disksize. Fixes: 3c47d541Signed-off-by:
Eric Biggers <ebiggers@google.com> Signed-off-by:
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Sudip Mukherjee authored
commit 03270c6a upstream. Usually every parallel port will have a single pardev registered with it. But ppdev driver is an exception. This userspace parallel port driver allows to create multiple parrallel port devices for a single parallel port. And as a result we were having a nice warning like: "sysctl table check failed: /dev/parport/parport0/devices/ppdev0/timeslice Sysctl already exists" Use the same logic as used in parport_register_device() and register the proc files only once for each parallel port. Fixes: 6fa45a22 ("parport: add device-model to parport subsystem") Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1414656 Bugzilla: https://bugs.archlinux.org/task/52322Tested-by:
James Feeney <james@nurealm.net> Signed-off-by:
Sudip Mukherjee <sudip.mukherjee@codethink.co.uk> Signed-off-by:
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Dmitry Torokhov authored
commit 3ff861f5 upstream. Even if bus is not hot-pluggable, devices can be unbound from the driver via sysfs, so we should not be using __exit annotations on remove() methods. The only exception is drivers registered with platform_driver_probe() which specifically disables sysfs bind/unbind attributes. Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
Jonathan Cameron <jic23@kernel.org> Signed-off-by:
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Song Hongyan authored
iio: hid-sensor-trigger: Change get poll value function order to avoid sensor properties losing after resume from S3 commit 3bec2474 upstream. In function _hid_sensor_power_state(), when hid_sensor_read_poll_value() is called, sensor's all properties will be updated by the value from sensor hardware/firmware. In some implementation, sensor hardware/firmware will do a power cycle during S3. In this case, after resume, once hid_sensor_read_poll_value() is called, sensor's all properties which are kept by driver during S3 will be changed to default value. But instead, if a set feature function is called first, sensor hardware/firmware will be recovered to the last status. So change the sensor_hub_set_feature() calling order to behind of set feature function to avoid sensor properties lose. Signed-off-by:
Song Hongyan <hongyan.song@intel.com> Acked-by:
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by:
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Lars-Peter Clausen authored
commit c42f8218 upstream. Use the IS_ENABLED() helper macro to ensure that the configfs group is initialized either when configfs is built-in or when configfs is built as a module. Otherwise software device creation will result in undefined behaviour when configfs is built as a module since the configfs group for the device not properly initialized. Similar to commit b2f0c096 ("iio: sw-trigger: Fix config group initialization"). Fixes: 0f3a8c3f ("iio: Add support for creating IIO devices via configfs") Reported-by:
Miguel Robles <miguel.robles@farole.net> Signed-off-by:
Lars-Peter Clausen <lars@metafoo.de> Acked-by:
Daniel Baluta <daniel.baluta@gmail.com> Signed-off-by:
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Michael Engl authored
commit e83bb3e6 upstream. The tiadc_irq_h(int irq, void *private) function is handling FIFO overruns by clearing flags, disabling and enabling the ADC to recover. If the ADC is running in continuous mode a FIFO overrun happens regularly. If the disabling of the ADC happens concurrently with a new conversion. It might happen that the enabling of the ADC is ignored by the hardware. This stops the ADC permanently. No more interrupts are triggered. According to the AM335x Reference Manual (SPRUH73H October 2011 - Revised April 2013 - Chapter 12.4 and 12.5) it is necessary to check the ADC FSM bits in REG_ADCFSM before enabling the ADC again. Because the disabling of the ADC is done right after the current conversion has been finished. To trigger this bug it is necessary to run the ADC in continuous mode. The ADC values of all channels need to be read in an endless loop. The bug appears within the first 6 hours (~5.4 million handled FIFO overruns). The user space application will hang on reading new values from the character device. Fixes: ca9a5638 ("iio: ti_am335x_adc: Add continuous sampling support") Signed-off-by:
Michael Engl <michael.engl@wjw-solutions.com> Signed-off-by:
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Johan Hovold authored
commit 181302dc upstream. Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer should a malicious device lack endpoints. Fixes: 53f3a9e2 ("mmc: USB SD Host Controller (USHC) driver") Cc: David Vrabel <david.vrabel@csr.com> Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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Johan Hovold authored
commit daf229b1 upstream. Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer should a malicious device lack endpoints. Note that the dereference happens in the start callback which is called during probe. Fixes: de520b8b ("uwb: add HWA radio controller driver") Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> Cc: David Vrabel <david.vrabel@csr.com> Signed-off-by:
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Johan Hovold authored
commit 4ce36271 upstream. Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer should a malicious device lack endpoints. Note that the dereference happens in the cmd and wait_init_done callbacks which are called during probe. Fixes: 1ba47da5 ("uwb: add the i1480 DFU driver") Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> Cc: David Vrabel <david.vrabel@csr.com> Signed-off-by:
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Johan Hovold authored
commit 2e47c535 upstream. Make sure to initialise the return value to avoid having allocation failures going unnoticed when allocating interrupt-endpoint resources. This prevents use-after-free or worse when the device is later unbound. Fixes: dbf3e7f6 ("Implement an ioctl to support the USMTMC-USB488 READ_STATUS_BYTE operation.") Cc: Dave Penkler <dpenkler@gmail.com> Signed-off-by:
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Johan Hovold authored
commit 687e0687 upstream. USBTMC devices are required to have a bulk-in and a bulk-out endpoint, but the driver failed to verify this, something which could lead to the endpoint addresses being taken from uninitialised memory. Make sure to zero all private data as part of allocation, and add the missing endpoint sanity check. Note that this also addresses a more recently introduced issue, where the interrupt-in-presence flag would also be uninitialised whenever the optional interrupt-in endpoint is not present. This in turn could lead to an interrupt urb being allocated, initialised and submitted based on uninitialised values. Fixes: dbf3e7f6 ("Implement an ioctl to support the USMTMC-USB488 READ_STATUS_BYTE operation.") Fixes: 5b775f67 ("USB: add USB test and measurement class driver") Signed-off-by:
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Guenter Roeck authored
commit 7b2db29f upstream. If usb_get_bos_descriptor() returns an error, usb->bos will be NULL. Nevertheless, it is dereferenced unconditionally in hub_set_initial_usb2_lpm_policy() if usb2_hw_lpm_capable is set. This results in a crash. usb 5-1: unable to get BOS descriptor ... Unable to handle kernel NULL pointer dereference at virtual address 00000008 pgd = ffffffc00165f000 [00000008] *pgd=000000000174f003, *pud=000000000174f003, *pmd=0000000001750003, *pte=00e8000001751713 Internal error: Oops: 96000005 [#1] PREEMPT SMP Modules linked in: uinput uvcvideo videobuf2_vmalloc cmac [ ... ] CPU: 5 PID: 3353 Comm: kworker/5:3 Tainted: G B 4.4.52 #480 Hardware name: Google Kevin (DT) Workqueue: events driver_set_config_work task: ffffffc0c3690000 ti: ffffffc0ae9a8000 task.ti: ffffffc0ae9a8000 PC is at hub_port_init+0xc3c/0xd10 LR is at hub_port_init+0xc3c/0xd10 ... Call trace: [<ffffffc0007fbbfc>] hub_port_init+0xc3c/0xd10 [<ffffffc0007fbe2c>] usb_reset_and_verify_device+0x15c/0x82c [<ffffffc0007fc5e0>] usb_reset_device+0xe4/0x298 [<ffffffbffc0e3fcc>] rtl8152_probe+0x84/0x9b0 [r8152] [<ffffffc00080ca8c>] usb_probe_interface+0x244/0x2f8 [<ffffffc000774a24>] driver_probe_device+0x180/0x3b4 [<ffffffc000774e48>] __device_attach_driver+0xb4/0xe0 [<ffffffc000772168>] bus_for_each_drv+0xb4/0xe4 [<ffffffc0007747ec>] __device_attach+0xd0/0x158 [<ffffffc000775080>] device_initial_probe+0x24/0x30 [<ffffffc0007739d4>] bus_probe_device+0x50/0xe4 [<ffffffc000770bd0>] device_add+0x414/0x738 [<ffffffc000809fe8>] usb_set_configuration+0x89c/0x914 [<ffffffc00080a120>] driver_set_config_work+0xc0/0xf0 [<ffffffc000249bb8>] process_one_work+0x390/0x6b8 [<ffffffc00024abcc>] worker_thread+0x480/0x610 [<ffffffc000251a80>] kthread+0x164/0x178 [<ffffffc0002045d0>] ret_from_fork+0x10/0x40 Since we don't know anything about LPM capabilities without BOS descriptor, don't attempt to enable LPM if it is not available. Fixes: 890dae88 ("xhci: Enable LPM support only for hardwired ...") Cc: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by:
Guenter Roeck <linux@roeck-us.net> Acked-by:
Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by:
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Bin Liu authored
commit 0090114d upstream. The CPPI 4.1 driver polls register to workaround the premature TX interrupt issue, but it causes audio playback underrun when triggered in Isoch transfers. Isoch doesn't do back-to-back transfers, the TX should be done by the time the next transfer is scheduled. So skip this polling workaround for Isoch transfer. Fixes: a655f481 ("usb: musb: musb_cppi41: handle pre-mature TX complete interrupt") Reported-by:
Alexandre Bailon <abailon@baylibre.com> Acked-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Tested-by:
Bin Liu <b-liu@ti.com> Signed-off-by:
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Johan Hovold authored
commit 03ace948 upstream. Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer or accessing memory beyond the endpoint array should a malicious device lack the expected endpoints. This specifically fixes the NULL-pointer dereference when probing HWA HC devices. Fixes: df365423 ("wusb: add the Wire Adapter (WA) core") Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> Cc: David Vrabel <david.vrabel@csr.com> Signed-off-by:
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Johan Hovold authored
commit b0addd3f upstream. Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer should a malicious device lack endpoints. Fixes: 1da177e4 ("Linux-2.6.12-rc2") Signed-off-by:
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Johan Hovold authored
commit 1dc56c52 upstream. Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer should the probed device lack endpoints. Note that this driver does not bind to any devices by default. Fixes: ce21bfe6 ("USB: Add LVS Test device driver") Cc: Pratyush Anand <pratyush.anand@gmail.com> Signed-off-by:
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Johan Hovold authored
commit f259ca3e upstream. Make sure to check the number of endpoints to avoid dereferencing a NULL-pointer or accessing memory beyond the endpoint array should a malicious device lack the expected endpoints. Note that the endpoint access that causes the NULL-deref is currently only used for debugging purposes during probe so the oops only happens when dynamic debugging is enabled. This means the driver could be rewritten to continue to accept device with only two endpoints, should such devices exist. Fixes: 1da177e4 ("Linux-2.6.12-rc2") Signed-off-by:
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Samuel Thibault authored
commit 3243367b upstream. Some USB 2.0 devices erroneously report millisecond values in bInterval. The generic config code manages to catch most of them, but in some cases it's not completely enough. The case at stake here is a USB 2.0 braille device, which wants to announce 10ms and thus sets bInterval to 10, but with the USB 2.0 computation that yields to 64ms. It happens that one can type fast enough to reach this interval and get the device buffers overflown, leading to problematic latencies. The generic config code does not catch this case because the 64ms is considered a sane enough value. This change thus adds a USB_QUIRK_LINEAR_FRAME_INTR_BINTERVAL quirk to mark devices which actually report milliseconds in bInterval, and marks Vario Ultra devices as needing it. Signed-off-by:
Samuel Thibault <samuel.thibault@ens-lyon.org> Acked-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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