If there are error flags in the aux transaction return -EIO rather than -EBUSY. -EIO restarts the whole transaction while -EBUSY jus retries. Fixes problematic aux transfers.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=80684

Signed-off-by: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org --- drivers/gpu/drm/radeon/atombios_dp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c index 35f4182..b1e11f8 100644 --- a/drivers/gpu/drm/radeon/atombios_dp.c +++ b/drivers/gpu/drm/radeon/atombios_dp.c @@ -127,7 +127,7 @@ static int radeon_process_aux_ch(struct radeon_i2c_chan *chan, /* flags not zero */ if (args.v1.ucReplyStatus == 2) { DRM_DEBUG_KMS("dp_aux_ch flags not zero\n"); - r = -EBUSY; + r = -EIO; goto done; }