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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-02-14 23:46:19 +0100 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-02-19 21:33:22 +0100 |
| commit | 450d007d199e632a1a4c4b91302deacd7d56815f (patch) | |
| tree | fca2d17b40f4f03b4ddc80fca903aacca985c40b /kernel/smp.c | |
| parent | Linux 5.0-rc7 (diff) | |
| download | linux-450d007d199e632a1a4c4b91302deacd7d56815f.tar.xz linux-450d007d199e632a1a4c4b91302deacd7d56815f.zip | |
gpu: drm: radeon: Set DPM_FLAG_NEVER_SKIP when enabling PM-runtime
On HP ProBook 4540s, if PM-runtime is enabled in the radeon driver
and the direct-complete optimization is used for the radeon device
during system-wide suspend, the system doesn't resume.
Preventing direct-complete from being used with the radeon device by
setting the DPM_FLAG_NEVER_SKIP driver flag for it makes the problem
go away, which indicates that direct-complete is not safe for the
radeon driver in general and should not be used with it (at least
for now).
This fixes a regression introduced by commit c62ec4610c40
("PM / core: Fix direct_complete handling for devices with no
callbacks") which allowed direct-complete to be applied to
devices without PM callbacks (again) which in turn unlocked
direct-complete for radeon on HP ProBook 4540s.
Fixes: c62ec4610c40 ("PM / core: Fix direct_complete handling for devices with no callbacks")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=201519
Reported-by: Ярослав Семченко <ukrkyi@gmail.com>
Tested-by: Ярослав Семченко <ukrkyi@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'kernel/smp.c')
0 files changed, 0 insertions, 0 deletions