diff options
| author | Michal Wajdeczko <[email protected]> | 2018-01-31 17:32:39 +0000 |
|---|---|---|
| committer | Chris Wilson <[email protected]> | 2018-02-01 12:36:50 +0000 |
| commit | 28647b52ec0e20f84eb1b5e13095134e2b371759 (patch) | |
| tree | dffc46136dbd0fcfd148ed6a8a4ecc97bf697022 /tools/perf/scripts/python/failed-syscalls-by-pid.py | |
| parent | bf67ce62a0758f6001355530a47cd37d3dca3de6 (diff) | |
drm/i915/guc: Don't try to create log runtime if there is no log
In case of GuC initialization failure we may continue with driver
load, but we wrongly assume that GuC is fully functional. This
leads to the BUG as we attempt to access non-existing log vma.
[26386.121085] BUG: unable to handle kernel NULL pointer dereference at 00000000000000a0
[26386.121225] IP: guc_log_runtime_create+0x23/0xe0 [i915]
[26386.121763] Call Trace:
[26386.121870] guc_log_late_setup+0xfd/0x140 [i915]
[26386.121969] i915_driver_load+0x7ab/0x1730 [i915]
[26386.122069] i915_pci_probe+0x2d/0x90 [i915]
[26386.122089] pci_device_probe+0x9c/0x120
[26386.122107] driver_probe_device+0x2a9/0x490
[26386.122126] __driver_attach+0xd9/0xe0
[26386.122143] ? driver_probe_device+0x490/0x490
[26386.122158] bus_for_each_dev+0x57/0x90
[26386.122175] bus_add_driver+0x1eb/0x260
[26386.122190] ? 0xffffffffa069a000
[26386.122206] driver_register+0x52/0xc0
[26386.122220] ? 0xffffffffa069a000
[26386.122234] do_one_initcall+0x39/0x170
[26386.122252] ? kmem_cache_alloc_trace+0x1fd/0x2e0
[26386.122273] do_init_module+0x56/0x1ec
[26386.122289] load_module+0x219e/0x2550
[26386.122309] ? vfs_read+0x121/0x140
[26386.122331] ? SyS_finit_module+0xa5/0xe0
[26386.122346] SyS_finit_module+0xa5/0xe0
[26386.122371] entry_SYSCALL_64_fastpath+0x22/0x8f
Signed-off-by: Michal Wajdeczko <[email protected]>
Cc: Chris Wilson <[email protected]>
Cc: Michal Winiarski <[email protected]>
Cc: Daniele Ceraolo Spurio <[email protected]>
Cc: Sagar Arun Kamble <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Reviewed-by: Sagar Arun Kamble <[email protected]>
Signed-off-by: Chris Wilson <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/failed-syscalls-by-pid.py')
0 files changed, 0 insertions, 0 deletions