[Intel-gfx] [PATCH] drm/i915: Avoid divbyzero in modesetting
Tvrtko Ursulin
tvrtko.ursulin at linux.intel.com
Tue Feb 23 09:49:59 UTC 2016
On 23/02/16 08:38, Maarten Lankhorst wrote:
> Op 22-02-16 om 15:27 schreef Tvrtko Ursulin:
>> [ 10.062881] [<ffffffffa016add2>] skl_update_pipe_wm+0x102/0x8c0 [i915]
>> [ 10.062942] [<ffffffffa016b96f>] skl_update_wm+0xff/0x5f0 [i915]
>> [ 10.063027] [<ffffffffa016ce6e>] intel_update_watermarks+0x1e/0x30 [i915]
>> [ 10.063087] [<ffffffffa01d3ee2>] intel_crtc_disable_noatomic+0xd2/0x150 [i915]
>> [ 10.063148] [<ffffffffa01dd3d2>] intel_modeset_setup_hw_state+0xdd2/0xde0 [i915]
>> [ 10.063181] [<ffffffffa01dfd83>] intel_modeset_init+0x15a3/0x1950 [i915]
>> [ 10.063181] [<ffffffffa02160b6>] i915_driver_load+0x13c6/0x1720 [i915]
> Do you have a full oops I can use for a commit description?
Sure:
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WARNING: CPU: 1 PID: 295 at drivers/gpu/drm/i915/intel_pm.c:2834 skl_update_pipe_wm+0x102/0x8c0 [i915]()
WARN_ON(!config->num_pipes_active)
Modules linked in: coretemp i915(+) xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
CPU: 1 PID: 295 Comm: systemd-udevd Tainted: G U W 4.5.0-rc4-xxxxxx #25
Hardware name: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
0000000000000000 ffff88003777f5a8 ffffffff813485c2 ffff88003777f5f0
ffffffffa0236240 ffff88003777f5e0 ffffffff81050fce ffff8800aa420000
ffff8800aba18000 ffff8800aba18000 ffff880037304c00 ffff8800aa420000
Call Trace:
[<ffffffff813485c2>] dump_stack+0x67/0x95
[<ffffffff81050fce>] warn_slowpath_common+0x9e/0xc0
[<ffffffff8105103c>] warn_slowpath_fmt+0x4c/0x50
[<ffffffff8106945e>] ? flush_work+0x8e/0x280
[<ffffffff810693d5>] ? flush_work+0x5/0x280
[<ffffffffa016add2>] skl_update_pipe_wm+0x102/0x8c0 [i915]
[<ffffffffa016b96f>] skl_update_wm+0xff/0x5f0 [i915]
[<ffffffff810928ee>] ? trace_hardirqs_on_caller+0x15e/0x1d0
[<ffffffff8109296d>] ? trace_hardirqs_on+0xd/0x10
[<ffffffffa016ce6e>] intel_update_watermarks+0x1e/0x30 [i915]
[<ffffffffa01d3ee2>] intel_crtc_disable_noatomic+0xd2/0x150 [i915]
[<ffffffffa01dd3d2>] intel_modeset_setup_hw_state+0xdd2/0xde0 [i915]
[<ffffffffa01dfd83>] intel_modeset_init+0x15a3/0x1950 [i915]
[<ffffffffa02160b6>] i915_driver_load+0x13c6/0x1720 [i915]
[<ffffffff81522160>] ? add_sysfs_fw_map_entry+0x9b/0x9b
[<ffffffffa00b15ef>] drm_dev_register+0x6f/0xb0 [drm]
[<ffffffffa00b3b3a>] drm_get_pci_dev+0x10a/0x1d0 [drm]
[<ffffffffa01582d9>] i915_pci_probe+0x49/0x50 [i915]
[<ffffffff8138ae30>] pci_device_probe+0x80/0xf0
[<ffffffff8143e2ac>] driver_probe_device+0x1bc/0x3d0
[<ffffffff8143e526>] __driver_attach+0x66/0x90
[<ffffffff8143e4c0>] ? driver_probe_device+0x3d0/0x3d0
[<ffffffff8143be3b>] bus_for_each_dev+0x5b/0xa0
[<ffffffff8143db3e>] driver_attach+0x1e/0x20
[<ffffffff8143d461>] bus_add_driver+0x151/0x270
[<ffffffff8143eabc>] driver_register+0x8c/0xd0
[<ffffffff8138a2ed>] __pci_register_driver+0x5d/0x60
[<ffffffffa00b3c58>] drm_pci_init+0x58/0xf0 [drm]
[<ffffffff8109296d>] ? trace_hardirqs_on+0xd/0x10
[<ffffffffa02aa000>] ? 0xffffffffa02aa000
[<ffffffffa02aa094>] i915_init+0x94/0x9b [i915]
[<ffffffff81000423>] do_one_initcall+0x113/0x1f0
[<ffffffff810a4b21>] ? rcu_read_lock_sched_held+0x61/0x90
[<ffffffff811601dc>] ? kmem_cache_alloc_trace+0x1cc/0x280
[<ffffffff8111110a>] do_init_module+0x60/0x1c8
[<ffffffff810c731b>] load_module+0x1ceb/0x2410
[<ffffffff810c3a60>] ? store_uevent+0x40/0x40
[<ffffffff811763d1>] ? kernel_read+0x41/0x60
[<ffffffff810c7c1d>] SYSC_finit_module+0x8d/0xa0
[<ffffffff810c7c4e>] SyS_finit_module+0xe/0x10
[<ffffffff815f1e97>] entry_SYSCALL_64_fastpath+0x12/0x6f
---[ end trace 1149e9ab3695a423 ]---
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Regards,
Tvrtko
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