- 31 Oct, 2016 30 commits
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Paulo Zanoni authored
commit 17777d61 upstream. According to BSpec, it's the "core CPUs" that need the code, which means SKL and KBL, but not BXT. I don't have a KBL to test this patch on it. v2: Only SKL should have I915_SAGV_NOT_CONTROLLED. Reviewed-by:
Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by:
Paulo Zanoni <paulo.r.zanoni@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1474578035-424-4-git-send-email-paulo.r.zanoni@intel.com (cherry picked from commit 6e3100ec) Signed-off-by:
Jani Nikula <jani.nikula@intel.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Paulo Zanoni authored
commit 6e7fdb87 upstream. And use it to move knowledge about the SAGV-supporting platforms from the callers to the SAGV code. We'll add more platforms to intel_has_sagv(), so IMHO it makes more sense to move all this to a single function instead of patching all the callers every time we add SAGV support to a new platform. v2: Move I915_SAGV_NOT_CONTROLLED to the new function (Lyude). Reviewed-by:
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Paulo Zanoni authored
commit 674f823b upstream. The plan is to introduce intel_has_sagv() and then use it to discover which platforms actually support it. I thought about keeping the functions with their current skl names, but found two problems: (i) skl_has_sagv() would become a very confusing name, and (ii) intel_atomic_commit_tail() doesn't seem to be calling any functions whose name start with a platform name, so the "intel_" naming scheme seems make more sense than the "firstplatorm_" naming scheme here. Reviewed-by:
Lyude <cpaul@redhat.com> Reviewed-by:
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Paulo Zanoni authored
commit 73fed0ef upstream. We forgot the "res_blocks += y_tile_minimum" that's described on step V of our documentation. Again, this should only affect the Y tiling cases. It looks like the relevant code was introduced in 0fda6568, but there's always the possibility that it matched our specification when it was introduced, and then the specification changed while the code stayed the same. So we can't really say this was a regression, but let's try to add a "Fixes" tag anyway to help backporting. v2: Try to add a "Fixes" tag (Maarten). Fixes: 0fda6568 ("drm/i915/skl: Update watermarks for Y tiling") Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by:
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Paulo Zanoni authored
commit cf6c525a upstream. The confusing thing is that plane_blocks_per_line is listed as part of the method 2 calculation but is also used for other things. We calculated it in two different places and different ways: one inside skl_wm_method2() and the other inside skl_compute_plane_wm(). The skl_wm_method2() implementation is the one that matches the specification. With this patch we fix the skl_compute_plane_wm() calculation and just pass it as a parameter to skl_wm_method2(). We also take care to not modify the value of plane_bytes_per_line since we're going to rely on it having a correct value in later patches. This should affect the watermarks for Linear and Y-tiled. From my analysis, it looks like the two plane_blocks_per_line variables got out of sync on 0fda6568, but we can't really say that commit was a regression, it looks like just an incomplete fix. There's always the possibility that 0fda6568 matched our specification at that time, and then later the specification changed. v2: Try to add a "Fixes" tag (Maarten). Fixes: 0fda6568 ("drm/i915/skl: Update watermarks for Y tiling") Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by:
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Paulo Zanoni authored
commit ccc10574 upstream. During watermarks calculations, this value is used in 3 different places. Only one of them was not using a hardcoded 4. Move the code up so everybody can benefit from the actual value. This should only help on situations with Y tiling + 90/270 rotation + 1 or 2 bpp or NV12. Reviewed-by:
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Paulo Zanoni authored
commit 4e4d3814 upstream. Bspec says: "The mailbox response data may not account for memory read latency. If the mailbox response data for level 0 is 0us, add 2 microseconds to the result for each valid level." This means we should only do the +2 in case wm[0] == 0, not always. So split the sanitizing implementation from the WA implementation and fix the WA implementation. v2: Add Fixes tag (Maarten). Fixes: 367294be ("drm/i915/gen9: Add 2us read latency to WM level") Cc: Vandana Kannan <vandana.kannan@intel.com> Reviewed-by:
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Paulo Zanoni authored
commit be5c571b upstream. We were previously adding all the planes owned by the CRTC even when the ddb partitioning didn't change for them. As a consequence, a lot of functions were being called when we were just moving the cursor around the screen, such as skylake_update_primary_plane(). This was causing flickering on the primary plane when moving the cursor. I'm not 100% sure which operation caused the flickering, but we were writing to a lot of registers, so it could be any of these writes. With this patch, just moving the mouse won't add the primary plane to the commit since it won't trigger a change in DDB partitioning. v2: Use skl_ddb_entry_equal() (Lyude). v3: Change Reported-and-bisected-by: to Reported-by: for checkpatch Fixes: 05a76d3d ("drm/i915/skl: Ensure pipes with changed wms get added to the state") Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97888 Cc: Mike Lothian <mike@fireburn.co.uk> Reported-by:
Mike Lothian <mike@fireburn.co.uk> Signed-off-by:
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Lyude authored
commit ccebc23b upstream. i915 sometimes needs to disable planes in the middle of an atomic commit, and then reenable them later in the same commit. Because of this, we can't make the assumption that the state of the plane actually changed. Since the state of the plane hasn't actually changed, neither have it's watermarks. And if the watermarks hasn't changed then we haven't populated skl_results with anything, which means we'll end up zeroing out a plane's watermarks in the middle of the atomic commit without restoring them later. Simple reproduction recipe: - Get a SKL laptop, launch any kind of X session - Get two extra monitors - Keep hotplugging both displays (so that the display configuration jumps from 1 active pipe to 3 active pipes and back) - Eventually underrun Changes since v1: - Fix incorrect use of "it's" Changes since v2: - Add reproduction recipe Signed-off-by:
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Lyude authored
commit 27082493 upstream. Now that we can hook into update_crtcs and control the order in which we update CRTCs at each modeset, we can finish the final step of fixing Skylake's watermark handling by performing DDB updates at the same time as plane updates and watermark updates. The first major change in this patch is skl_update_crtcs(), which handles ensuring that we order each CRTC update in our atomic commits properly so that they honor the DDB flush order. The second major change in this patch is the order in which we flush the pipes. While the previous order may have worked, it can't be used in this approach since it no longer will do the right thing. For example, using the old ddb flush order: We have pipes A, B, and C enabled, and we're disabling C. Initial ddb allocation looks like this: | A | B |xxxxxxx| Since we're performing the ddb updates after performing any CRTC disablements in intel_atomic_commit_tail(), the space to the right of pipe B is unallocated. 1. Flush pipes with new allocation contained into old space. None apply, so we skip this 2. Flush pipes having their allocation reduced, but overlapping with a previous allocation. None apply, so we also skip this 3. Flush pipes that got more space allocated. This applies to A and B, giving us the following update order: A, B This is wrong, since updating pipe A first will cause it to overlap with B and potentially burst into flames. Our new order (see the code comments for details) would update the pipes in the proper order: B, A. As well, we calculate the order for each DDB update during the check phase, and reference it later in the commit phase when we hit skl_update_crtcs(). This long overdue patch fixes the rest of the underruns on Skylake. Changes since v1: - Add skl_ddb_entry_write() for cursor into skl_write_cursor_wm() Changes since v2: - Use the method for updating CRTCs that Ville suggested - In skl_update_wm(), only copy the watermarks for the crtc that was passed to us Changes since v3: - Small comment fix in skl_ddb_allocation_overlaps() Changes since v4: - Remove the second loop in intel_update_crtcs() and use Ville's suggestion for updating the ddb allocations in the right order - Get rid of the second loop and just use the ddb state as it updates to determine what order to update everything in (thanks for the suggestion Ville) - Simplify skl_ddb_allocation_overlaps() - Split actual overlap checking into it's own helper Fixes: 0e8fb7ba ("drm/i915/skl: Flush the WM configuration") Fixes: 8211bd5b ("drm/i915/skl: Program the DDB allocation") [omitting CC for stable, since this patch will need to be changed for such backports first] Testcase: kms_cursor_legacy Testcase: plane-all-modeset-transition Signed-off-by:
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Lyude authored
commit 896e5bb0 upstream. Since we have to write ddb allocations at the same time as we do other plane updates, we're going to need to be able to control the order in which we execute modesets on each pipe. The easiest way to do this is to just factor this section of intel_atomic_commit_tail() (intel_atomic_commit() for stable branches) into it's own function, and add an appropriate display function hook for it. Based off of Matt Rope's suggestions Changes since v1: - Drop pipe_config->base.active check in intel_update_crtcs() since we check that before calling the function Signed-off-by:
Matt Roper <matthew.d.roper@intel.com> [omitting CC for stable, since this patch will need to be changed for such backports first] Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Radhakrishna Sripada <radhakrishna.sripada@intel.com> Cc: Hans de Goede <hdegoede@redhat.com> Signed-off-by:
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Lyude authored
commit 62e0fb88 upstream. Thanks to Ville for suggesting this as a potential solution to pipe underruns on Skylake. On Skylake all of the registers for configuring planes, including the registers for configuring their watermarks, are double buffered. New values written to them won't take effect until said registers are "armed", which is done by writing to the PLANE_SURF (or in the case of cursor planes, the CURBASE register) register. With this in mind, up until now we've been updating watermarks on skl like this: non-modeset { - calculate (during atomic check phase) - finish_atomic_commit: - intel_pre_plane_update: - intel_update_watermarks() - {vblank happens; new watermarks + old plane values => underrun } - drm_atomic_helper_commit_planes_on_crtc: - start vblank evasion - write new plane registers - end vblank evasion } or modeset { - calculate (during atomic check phase) - finish_atomic_commit: - crtc_enable: - intel_update_watermarks() - {vblank happens; new watermarks + old plane values => underrun } - drm_atomic_helper_commit_planes_on_crtc: - start vblank evasion - write new plane registers - end vblank evasion } Now we update watermarks atomically like this: non-modeset { - calculate (during atomic check phase) - finish_atomic_commit: - intel_pre_plane_update: - intel_update_watermarks() (wm values aren't written yet) - drm_atomic_helper_commit_planes_on_crtc: - start vblank evasion - write new plane registers - write new wm values - end vblank evasion } modeset { - calculate (during atomic check phase) - finish_atomic_commit: - crtc_enable: - intel_update_watermarks() (actual wm values aren't written yet) - drm_atomic_helper_commit_planes_on_crtc: - start vblank evasion - write new plane registers - write new wm values - end vblank evasion } So this patch moves all of the watermark writes into the right place; inside of the vblank evasion where we update all of the registers for each plane. While this patch doesn't fix everything, it does allow us to update the watermark values in the way the hardware expects us to. Changes since original patch series: - Remove mutex_lock/mutex_unlock since they don't do anything and we're not touching global state - Move skl_write_cursor_wm/skl_write_plane_wm functions into intel_pm.c, make externally visible - Add skl_write_plane_wm calls to skl_update_plane - Fix conditional for for loop in skl_write_plane_wm (level < max_level should be level <= max_level) - Make diagram in commit more accurate to what's actually happening - Add Fixes: Changes since v1: - Use IS_GEN9() instead of IS_SKYLAKE() since these fixes apply to more then just Skylake - Update description to make it clear this patch doesn't fix everything - Check if pipes were actually changed before writing watermarks Changes since v2: - Write PIPE_WM_LINETIME during vblank evasion Changes since v3: - Rebase against new SAGV patch changes Changes since v4: - Add a parameter to choose what skl_wm_values struct to use when writing new plane watermarks Changes since v5: - Remove cursor ddb entry write in skl_write_cursor_wm(), defer until patch 6 - Write WM_LINETIME in intel_begin_crtc_commit() Changes since v6: - Remove redundant dirty_pipes check in skl_write_plane_wm (we check this in all places where we call this function, and it was supposed to have been removed earlier anyway) - In i9xx_update_cursor(), use dev_priv->info.gen >= 9 instead of IS_GEN9(dev_priv). We do this everywhere else and I'd imagine this needs to be done for gen10 as well Changes since v7: - Fix rebase fail (unused variable obj) - Make struct skl_wm_values *wm const - Fix indenting - Use INTEL_GEN() instead of dev_priv->info.gen Changes since v8: - Don't forget calls to skl_write_plane_wm() when disabling planes - Use INTEL_GEN(), not INTEL_INFO()->gen in intel_begin_crtc_commit() Fixes: 2d41c0b5 ("drm/i915/skl: SKL Watermark Computation") Signed-off-by:
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Steinar H. Gunderson authored
commit 4973ca9a upstream. The Akai MIDImix (09e8:0031) is a MIDI fader controller that speaks regular MIDI and works well with Linux. However, initialization gets delayed due to reports timeout: [3643645.631124] hid-generic 0003:09E8:0031.0020: timeout initializing reports [3643645.632416] hid-generic 0003:09E8:0031.0020: hiddev0: USB HID v1.11 Device [AKAI MIDI Mix] on usb-0000:00:14.0-2/input0 Adding "usbhid.quirks=0x09e8:0x0031:0x20000000" on the kernel command line makes the issues go away. Signed-off-by:
Steinar H. Gunderson <sgunderson@bigfoot.com> Signed-off-by:
Jiri Kosina <jkosina@suse.cz> Signed-off-by:
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Rex Zhu authored
commit 9716ebc3 upstream. Signed-off-by:
Rex Zhu <Rex.Zhu@amd.com> Reviewed-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
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Stefan Agner authored
commit 6cc4758a upstream. Since using clk_register_divider to setup the pixel clock, regmap is no longer used. Regmap did take care of DCU using different endianness. Check endianness using the device-tree property "big-endian" to determine the location of DIV_RATIO. Fixes: 2d701449 ("drm/fsl-dcu: use common clock framework for pixel clock divider") Reported-by:
Meng Yi <meng.yi@nxp.com> Signed-off-by:
Stefan Agner <stefan@agner.ch> Tested-by:
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Thomas Hellstrom authored
commit 51ab70be upstream. With older hardware versions, the user could specify arbitrarily large command buffer sizes, causing a vmalloc / vmap space exhaustion. Signed-off-by:
Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by:
Brian Paul <brianp@vmware.com> Reviewed-by:
Sinclair Yeh <syeh@vmware.com> Signed-off-by:
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Alex Deucher authored
commit 02cfb5fc upstream. Ported from Rex's amdgpu change. Signed-off-by:
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Alex Deucher authored
commit 42792029 upstream. Used the wrong index to setup the phase shedding mask. Signed-off-by:
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Alex Deucher authored
commit 884031f0 upstream. Only needed on CIK+ due to the way pci reset is handled by the GPU. Signed-off-by:
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Rex Zhu authored
commit dc8184aa upstream. Signed-off-by:
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Nicolai Hähnle authored
commit ce199ad6 upstream. Ensure that we really only report a GPU reset if one has happened since the creation of the context. Signed-off-by:
Nicolai Hähnle <nicolai.haehnle@amd.com> Reviewed-by:
Christian König <christian.koenig@amd.com> Signed-off-by:
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Grazvydas Ignotas authored
commit 140c94da upstream. All other amdgpu/dce_v* files have this call, it's only mysteriously missing from dce_v11_0.c since the file was added and causes leaks. Fixes: aaa36a97 ("drm/amdgpu: Add initial VI support") Signed-off-by:
Grazvydas Ignotas <notasas@gmail.com> Signed-off-by:
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Alex Deucher authored
commit 3a9d993e upstream. Otherwise we can get a hotplug interrupt storm when we turn the panel off if hpd interrupts were enabled by the bios. bug: https://bugs.freedesktop.org/show_bug.cgi?id=97471Signed-off-by:
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Alex Deucher authored
commit 32408258 upstream. Otherwise we can get a hotplug interrupt storm when we turn the panel off if hpd interrupts were enabled by the bios. bug: https://bugs.freedesktop.org/show_bug.cgi?id=97471Signed-off-by:
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Alex Deucher authored
commit e96ec90f upstream. Otherwise we can get a hotplug interrupt storm when we turn the panel off if hpd interrupts were enabled by the bios. bug: https://bugs.freedesktop.org/show_bug.cgi?id=97471Signed-off-by:
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Alex Deucher authored
commit c4795ca6 upstream. According to the hw team, it should be 16, not 8. Cc: Peter Fang <peter.fang@amd.com> Signed-off-by:
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Shawn Lee authored
commit 915b4179 upstream. Backlight enable is supposed to do a full setup of the backlight. We were missing the PWM alternate increment bit in the south chicken registers on lpt+ pch. This potentially caused a PWM frequency change when the chicken register value was lost e.g. on suspend. v2 by Jani, rebase on the patch caching alt increment Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97486 References: https://bugs.freedesktop.org/show_bug.cgi?id=67454 Cc: Cooper Chiou <cooper.chiou@intel.com> Cc: Wei Shun Chen <wei.shun.chang@intel.com> Cc: Gary C Wang <gary.c.wang@intel.com> Reviewed-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by:
Shawn Lee <shawn.c.lee@intel.com> Signed-off-by:
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Jani Nikula authored
commit 16e1203d upstream. This will also be needed later on when setting up the alternate increment in backlight enable. Cc: Shawn Lee <shawn.c.lee@intel.com> Reviewed-by:
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Chris Wilson authored
commit 56a76c01 upstream. dma_buf_export() adds a reference to the owning module to the dmabuf (to prevent the driver from being unloaded whilst a third party still refers to the dmabuf). However, drm_gem_prime_export() was passing its own THIS_MODULE (i.e. drm.ko) rather than the driver. Extract the right owner from the device->fops instead. v2: Use C99 initializers to zero out unset elements of dma_buf_export_info v3: Extract the right module from dev->fops. Testcase: igt/vgem_basic/unload Reported-by:
Petri Latvala <petri.latvala@intel.com> Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Cc: Petri Latvala <petri.latvala@intel.com> Cc: Christian König <christian.koenig@amd.com> Tested-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20161005122145.1507-1-chris@chris-wilson.co.ukSigned-off-by:
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Eric Anholt authored
commit 7edabee0 upstream. With the introduction of bin/render pipelining, the previous job may not be completed when we start binning the next one. If the previous job wrote our VBO, IB, or CS textures, then the binning stage might get stale or uninitialized results. Fixes the major rendering failure in glmark2 -b terrain. Signed-off-by:
Eric Anholt <eric@anholt.net> Fixes: ca26d28b ("drm/vc4: improve throughput by pipelining binning and rendering jobs") Signed-off-by:
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- 28 Oct, 2016 10 commits
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Greg Kroah-Hartman authored
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Nicholas Bellinger authored
commit 61f36166 upstream. This reverts commit c1ccbfe0. Reverting this patch, as it incorrectly assumes the additional length for INQUIRY in target_complete_cmd_with_length() is SCSI allocation length, which breaks existing user-space code when SCSI allocation length is smaller than additional length. root@scsi-mq:~# sg_inq --len=4 -vvvv /dev/sdb found bsg_major=253 open /dev/sdb with flags=0x800 inquiry cdb: 12 00 00 00 04 00 duration=0 ms inquiry: pass-through requested 4 bytes (data-in) but got -28 bytes inquiry: pass-through can't get negative bytes, say it got none inquiry: got too few bytes (0) INQUIRY resid (32) should never exceed requested len=4 inquiry: failed requesting 4 byte response: Malformed response to SCSI command [resid=32] AFAICT the original change was not to address a specific host issue, so go ahead and revert to original logic for now. Cc: Douglas Gilbert <dgilbert@interlog.com> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Sumit Rai <sumitrai96@gmail.com> Signed-off-by:
Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by:
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Dinesh Israni authored
commit 926317de upstream. This patch addresses a bug where a local EXTENDED_COPY WRITE or READ backend I/O request would always return SAM_STAT_CHECK_CONDITION, even if underlying xcopy_pt_cmd->se_cmd generated a different SCSI status code. ESX host environments expect to hit SAM_STAT_RESERVATION_CONFLICT for certain scenarios, and SAM_STAT_CHECK_CONDITION results in non-retriable status for these cases. Tested on v4.1.y with ESX v5.5u2+ with local IBLOCK backend copy. Reported-by:
Nixon Vincent <nixon.vincent@calsoftinc.com> Tested-by:
Dinesh Israni <ddi@datera.io> Signed-off-by:
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Nicholas Bellinger authored
commit 449a1378 upstream. This patch addresses a bug where EXTENDED_COPY across multiple LUNs results in a CHECK_CONDITION when the source + destination are not located on the same physical node. ESX Host environments expect sense COPY_ABORTED w/ COPY TARGET DEVICE NOT REACHABLE to be returned when this occurs, in order to signal fallback to local copy method. As described in section 6.3.3 of spc4r22: "If it is not possible to complete processing of a segment because the copy manager is unable to establish communications with a copy target device, because the copy target device does not respond to INQUIRY, or because the data returned in response to INQUIRY indicates an unsupported logical unit, then the EXTENDED COPY command shall be terminated with CHECK CONDITION status, with the sense key set to COPY ABORTED, and the additional sense code set to COPY TARGET DEVICE NOT REACHABLE." Tested on v4.1.y with ESX v5.5u2+ with BlockCopy across multiple nodes. Reported-by:
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Nicholas Bellinger authored
commit 527268df upstream. This patch fixes a regression in >= v4.1.y code where the original SCF_ACK_KREF assignment in target_get_sess_cmd() was dropped upstream in commit 054922bb, but the series for addressing TMR ABORT_TASK + LUN_RESET with fabric session reinstatement in commit febe562c still depends on this code in transport_cmd_finish_abort(). The regression manifests itself as a se_cmd->cmd_kref +1 leak, where ABORT_TASK + LUN_RESET can hang indefinately for a specific I_T session for drivers using SCF_ACK_KREF, resulting in hung kthreads. This patch has been verified with v4.1.y code. Reported-by:
Vaibhav Tandon <vst@datera.io> Tested-by:
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Hannes Reinecke authored
commit 1ba0158f upstream. The libfc stack assigns exchange IDs based on the CPU the request was received on, so we need to send the responses via the same CPU. Otherwise the send logic gets confuses and responses will be delayed, causing exchange timeouts on the initiator side. Signed-off-by:
Hannes Reinecke <hare@suse.com> Signed-off-by:
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Richard Weinberger authored
commit 843741c5 upstream. When the operation fails we also have to undo the changes we made to ->xattr_names. Otherwise listxattr() will report wrong lengths. Signed-off-by:
Richard Weinberger <richard@nod.at> Signed-off-by:
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Taesoo Kim authored
commit 559cce69 upstream. When 'jh->b_transaction == transaction' (asserted by below) J_ASSERT_JH(jh, (jh->b_transaction == transaction || ... 'journal->j_list_lock' will be incorrectly unlocked, since the the lock is aquired only at the end of if / else-if statements (missing the else case). Signed-off-by:
Taesoo Kim <tsgatesv@gmail.com> Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Reviewed-by:
Andreas Dilger <adilger@dilger.ca> Fixes: 6e4862a5Signed-off-by:
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Eric Biggers authored
commit c4704a4f upstream. The sysfs file /sys/fs/ext4/features/encryption was present on kernels compiled with CONFIG_EXT4_FS_ENCRYPTION=n. This was misleading because such kernels do not actually support ext4 encryption. Therefore, only provide this file on kernels compiled with CONFIG_EXT4_FS_ENCRYPTION=y. Note: since the ext4 feature files are all hardcoded to have a contents of "supported", it really is the presence or absence of the file that is significant, not the contents (and this change reflects that). Signed-off-by:
Eric Biggers <ebiggers@google.com> Signed-off-by:
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Eric Biggers authored
commit 8906a822 upstream. i_rwsem needs to be acquired while setting an encryption policy so that concurrent calls to FS_IOC_SET_ENCRYPTION_POLICY are correctly serialized (especially the ->get_context() + ->set_context() pair), and so that new files cannot be created in the directory during or after the ->empty_dir() check. Signed-off-by:
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