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Linux kernel source tree
5422d30957
Do not do intel_fbdev_set_suspend during runtime_suspend/resume
functions. This cause a big circular lock_dep splat.
kworker/0:4/198 is trying to acquire lock:
<4> [77.185594] ffffffff83398500 (console_lock){+.+.}-{0:0}, at:
intel_fbdev_set_suspend+0x169/0x1f0 [xe]
<4> [77.185947]
but task is already holding lock:
<4> [77.185949] ffffffffa09e9460
(xe_pm_runtime_lockdep_map){+.+.}-{0:0}, at:
xe_pm_runtime_suspend+0x51/0x3f0 [xe]
<4> [77.186262]
which lock already depends on the new lock.
<4> [77.186264]
the existing dependency chain (in reverse order) is:
<4> [77.186266]
-> #2 (xe_pm_runtime_lockdep_map){+.+.}-{0:0}:
<4> [77.186276] pm_runtime_lockdep_prime+0x2f/0x50 [xe]
<4> [77.186572] xe_pm_runtime_resume_and_get+0x29/0x90 [xe]
<4> [77.186867] intelfb_create+0x150/0x390 [xe]
<4> [77.187197]
__drm_fb_helper_initial_config_and_unlock+0x31c/0x5e0 [drm_kms_helper]
<4> [77.187243] drm_fb_helper_initial_config+0x3d/0x50
[drm_kms_helper]
<4> [77.187274] intel_fbdev_client_hotplug+0xb1/0x140 [xe]
<4> [77.187603] drm_client_register+0x87/0xd0 [drm]
<4> [77.187704] intel_fbdev_setup+0x51c/0x640 [xe]
<4> [77.188033] intel_display_driver_register+0xb7/0xf0 [xe]
<4> [77.188438] xe_display_register+0x21/0x40 [xe]
<4> [77.188809] xe_device_probe+0xa8d/0xbf0 [xe]
<4> [77.189035] xe_pci_probe+0x333/0x5b0 [xe]
<4> [77.189330] local_pci_probe+0x48/0xb0
<4> [77.189341] pci_device_probe+0xc8/0x280
<4> [77.189351] really_probe+0xf8/0x390
<4> [77.189362] __driver_probe_device+0x8a/0x170
<4> [77.189373] driver_probe_device+0x23/0xb0
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240912012545.702032-3-suraj.kandpal@intel.com
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.