6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx> [ Upstream commit b5236da757adc75d7e52c69bdc233d29249a0d0c ] [Why] These functions can be called from high IRQ levels and the OS will hang if it tries to use a usleep_highres or a msleep. [How] Replace the flseep with a udelay for dmub_replay_enable. Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx> Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx> Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/gpu/drm/amd/display/dc/dce/dmub_replay.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_replay.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_replay.c index 28149e53c2a6..eeb5b8247c96 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dmub_replay.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_replay.c @@ -102,7 +102,8 @@ static void dmub_replay_enable(struct dmub_replay *dmub, bool enable, bool wait, break; } - fsleep(500); + /* must *not* be fsleep - this can be called from high irq levels */ + udelay(500); } /* assert if max retry hit */ -- 2.43.0
