diff options
| author |   Arun R Murthy <arun.r.murthy@intel.com> | 2022-08-08 09:27:50 +0530 |
|---|---|---|
| committer |   Jani Nikula <jani.nikula@intel.com> | 2022-08-22 12:10:49 +0300 |
| commit | 4234ea30051200fc6016de10e4d58369e60b38f1 (patch) | |
| tree | c43114fdd2d3ef9513c7d0a49e22bdd00185711e /include/linux/mfd/git:/ssh: | |
| parent | drm/i915/mtl: Introduce FBC B (diff) | |
| download | linux-dev-4234ea30051200fc6016de10e4d58369e60b38f1.tar.xz linux-dev-4234ea30051200fc6016de10e4d58369e60b38f1.zip | |
drm/i915/display: avoid warnings when registering dual panel backlight
Commit 20f85ef89d94 ("drm/i915/backlight: use unique backlight device
names") added support for multiple backlight devices on dual panel
systems, but did so with error handling on -EEXIST from
backlight_device_register(). Unfortunately, that triggered a warning in
dmesg all the way down from sysfs_add_file_mode_ns() and
sysfs_warn_dup().
Instead of optimistically always attempting to register with the default
name ("intel_backlight", which we have to retain for backward
compatibility), check if a backlight device with the name exists first,
and, if so, use the card and connector based name.
v2: reworked on top of the patch commit 20f85ef89d94
("drm/i915/backlight: use unique backlight device names")
v3: fixed the ref count leak(Jani N)
Fixes: 20f85ef89d94 ("drm/i915/backlight: use unique backlight device names")
Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220808035750.3111046-1-arun.r.murthy@intel.com
Diffstat (limited to 'include/linux/mfd/git:/ssh:')
0 files changed, 0 insertions, 0 deletions