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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [bdw psr] OOPS intel_psr_ready+0x76/0x194"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89835">89835</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[bdw psr] OOPS intel_psr_ready+0x76/0x194
</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>blocker
</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>chris@chris-wilson.co.uk
</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>
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<div>
<pre>[ 288.752257] BUG: unable to handle kernel NULL pointer dereference at
0000000000000020
[ 288.752283] IP: [<ffffffffa027c100>] intel_psr_ready+0x76/0x194 [i915]
[ 288.752372] PGD 14633c067 PUD 149b23067 PMD 0
[ 288.752389] Oops: 0000 [#1] SMP
[ 288.752399] Modules linked in: i915 uinput hid_generic usbhid hid loop
x86_pkg_temp_thermal coretemp ghash_clmulni_intel aesni_intel aes_x86_64
ablk_helper cryptd lrw gf128mul glue_helper iTCO_wdt iTCO_vendor_support
microcode pcspkr i2c_i801 battery xhci_pci xhci_hcd lpc_ich intel_gtt mfd_core
usbcore drm_kms_helper usb_common ac acpi_pad acpi_cpufreq evdev processor
sd_mod crc32c_intel ahci libahci libata scsi_mod thermal fan
[ 288.752548] CPU: 3 PID: 4108 Comm: Xorg Tainted: G W 4.0.0-rc6+
#199
[ 288.752555] Hardware name: Intel Corporation Broadwell Client
platform/SawTooth Peak, BIOS BDW-E1R1.86C.0093.R00.1409071941 09/07/2014
[ 288.752562] task: ffff8800367ed550 ti: ffff8800ab5dc000 task.ti:
ffff8800ab5dc000
[ 288.752568] RIP: 0010:[<ffffffffa027c100>] [<ffffffffa027c100>]
intel_psr_ready+0x76/0x194 [i915]
[ 288.752637] RSP: 0018:ffff8800ab5dfa98 EFLAGS: 00010286
[ 288.752643] RAX: 00000000fffffff9 RBX: ffff8800ab7d0000 RCX:
0000000000000003
[ 288.752648] RDX: 0000000000000018 RSI: ffff880036b88c00 RDI:
ffff8800a788b0e0
[ 288.752654] RBP: ffff8800ab5dfab8 R08: 0000000000000000 R09:
0000000000000000
[ 288.752659] R10: 0000000000000780 R11: 00000000000007ae R12:
ffff88003548a000
[ 288.752664] R13: 0000000000000000 R14: ffff8800a788b0e0 R15:
ffff880036b88c00
[ 288.752671] FS: 00007f5b6e064880(0000) GS:ffff88014ecc0000(0000)
knlGS:0000000000000000
[ 288.752677] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 288.752682] CR2: 0000000000000020 CR3: 0000000148a49000 CR4:
00000000003407e0
[ 288.752688] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 288.752693] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 288.752697] Stack:
[ 288.752702] ffff8800a788b000 0000000000000018 ffff880146170000
0000000000000000
[ 288.752717] ffff8800ab5dfb58 ffffffffa028be02 0000000000000000
0000000000000000
[ 288.752736] ffff880036b88c18 ffff8800ab7d0000 ffff8800356a8800
ffff8800a788b0e0
[ 288.752751] Call Trace:
[ 288.752824] [<ffffffffa028be02>] intel_dp_compute_config+0x1be/0x543 [i915]
[ 288.752889] [<ffffffffa0284fb0>] intel_ddi_compute_config+0x66/0x6f [i915]
[ 288.752953] [<ffffffffa02719f3>] intel_modeset_compute_config+0x737/0xd79
[i915]
[ 288.753011] [<ffffffffa02747c4>] intel_crtc_set_config+0x830/0xc98 [i915]
[ 288.753024] [<ffffffff812a7110>] ? _object_find+0x56/0x7a
[ 288.753033] [<ffffffff812a7d8d>] drm_mode_set_config_internal+0x55/0xe2
[ 288.753042] [<ffffffff812abca9>] drm_mode_setcrtc+0x448/0x4dd
[ 288.753052] [<ffffffff812a040e>] drm_ioctl+0x27c/0x3da
[ 288.753061] [<ffffffff81140615>] ? fsnotify+0x26d/0x293
[ 288.753070] [<ffffffff812ab861>] ? drm_mode_setplane+0x1c3/0x1c3
[ 288.753080] [<ffffffff81120bb5>] do_vfs_ioctl+0x419/0x461
[ 288.753090] [<ffffffff81112dbb>] ? fdput.isra.9+0xf/0x11
[ 288.753099] [<ffffffff81112de6>] ? fdput_pos.isra.10+0x29/0x30
[ 288.753107] [<ffffffff81128534>] ? __fget+0x20/0x5a
[ 288.753115] [<ffffffff81120c36>] SyS_ioctl+0x39/0x63
[ 288.753125] [<ffffffff813998b2>] system_call_fastpath+0x12/0x17
[ 288.753130] Code: e9 2b 01 00 00 41 8b 84 24 28 02 00 00 ff c8 75 1a 48 c7
c2 54 4b 2c a0 be 18 01 00 00 48 c7 c7 a2 4a 2c a0 31 c0 e8 79 f0 db e0 <41> 8b
45 20 ff c8 75 1a 48 c7 c2 98 4b 2c a0 be 19 01 00 00 48
[ 288.753309] RIP [<ffffffffa027c100>] intel_psr_ready+0x76/0x194 [i915]
[ 288.753384] RSP <ffff8800ab5dfa98>
[ 288.753390] CR2: 0000000000000020
(gdb) list *intel_psr_ready+0x76
0x61124 is in intel_psr_ready (./arch/x86/include/asm/atomic.h:27).
22 *
23 * Atomically reads the value of @v.
24 */
25 static inline int atomic_read(const atomic_t *v)
26 {
27 return ACCESS_ONCE((v)->counter);
28 }
29
30 /**
31 * atomic_set - set atomic variable</pre>
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