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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - GuC is calling a sleeping function in atomic context"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93847">93847</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>GuC is calling a sleeping function in atomic context
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>tvrtko.ursulin@linux.intel.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>In i915_guc_wq_check_space, usleep_range is being called while kmap_atomic is
held. This results in:
[ 34.098798] BUG: scheduling while atomic: gem_close_race/1941/0x00000002
[ 34.098822] Modules linked in: hid_generic usbhid i915 asix usbnet libphy
mii i2c_algo_bit drm_kms_helper cfbfillrect syscopyarea cfbimgblt sysfillrect
sysimgblt fb_sys_fops cfbcopyarea drm coretemp i2c_hid hid video
pinctrl_sunrisepoint pinctrl_intel acpi_pad nls_iso8859_1 e1000e ptp psmouse
pps_core ahci libahci
[ 34.098824] CPU: 0 PID: 1941 Comm: gem_close_race Tainted: G U
4.4.0-160121+ #123
[ 34.098824] Hardware name: Intel Corporation Skylake Client platform/Skylake
AIO DDR3L RVP10, BIOS SKLSE2R1.R00.X100.B01.1509220551 09/22/2015
[ 34.098825] 0000000000013e40 ffff880166c27a78 ffffffff81280d02
ffff880172c13e40
[ 34.098826] ffff880166c27a88 ffffffff810c203a ffff880166c27ac8
ffffffff814ec808
[ 34.098827] ffff88016b7c6000 ffff880166c28000 00000000000f4240
0000000000000001
[ 34.098827] Call Trace:
[ 34.098831] [<ffffffff81280d02>] dump_stack+0x4b/0x79
[ 34.098833] [<ffffffff810c203a>] __schedule_bug+0x41/0x4f
[ 34.098834] [<ffffffff814ec808>] __schedule+0x5a8/0x690
[ 34.098835] [<ffffffff814ec927>] schedule+0x37/0x80
[ 34.098836] [<ffffffff814ef3fd>] schedule_hrtimeout_range_clock+0xad/0x130
[ 34.098837] [<ffffffff81090be0>] ? hrtimer_init+0x10/0x10
[ 34.098838] [<ffffffff814ef3f1>] ?
schedule_hrtimeout_range_clock+0xa1/0x130
[ 34.098839] [<ffffffff814ef48e>] schedule_hrtimeout_range+0xe/0x10
[ 34.098840] [<ffffffff814eef9b>] usleep_range+0x3b/0x40
[ 34.098853] [<ffffffffa01ec109>] i915_guc_wq_check_space+0x119/0x210 [i915]
[ 34.098861] [<ffffffffa01da47c>]
intel_logical_ring_alloc_request_extras+0x5c/0x70 [i915]
[ 34.098869] [<ffffffffa01cdbf1>] i915_gem_request_alloc+0x91/0x170 [i915]
[ 34.098875] [<ffffffffa01c1c07>]
i915_gem_do_execbuffer.isra.25+0xbc7/0x12a0 [i915]
[ 34.098882] [<ffffffffa01cb785>] ?
i915_gem_object_get_pages_gtt+0x225/0x3c0 [i915]
[ 34.098889] [<ffffffffa01d1fb6>] ? i915_gem_pwrite_ioctl+0xd6/0x9f0 [i915]
[ 34.098895] [<ffffffffa01c2e68>] i915_gem_execbuffer2+0xa8/0x250 [i915]
[ 34.098900] [<ffffffffa00f65d8>] drm_ioctl+0x258/0x4f0 [drm]
[ 34.098906] [<ffffffffa01c2dc0>] ? i915_gem_execbuffer+0x340/0x340 [i915]
[ 34.098908] [<ffffffff8111590d>] do_vfs_ioctl+0x2cd/0x4a0
[ 34.098909] [<ffffffff8111eac2>] ? __fget+0x72/0xb0
[ 34.098910] [<ffffffff81115b1c>] SyS_ioctl+0x3c/0x70
[ 34.098911] [<ffffffff814effd7>] entry_SYSCALL_64_fastpath+0x12/0x6a
[ 34.100208] ------------[ cut here ]------------</pre>
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