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Date: Fri, 8 Aug 2014 13:38:36 -0700
From: Kamal Mostafa <kamal@...onical.com>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org,
kernel-team@...ts.ubuntu.com
Cc: Alex Deucher <alexander.deucher@....com>,
Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13 093/259] drm/radeon/dp: return -EIO for flags not zero case
3.13.11.6 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Alex Deucher <alexander.deucher@....com>
commit f6be5e64500abbba44e191e1ca0f3366c7d0291b upstream.
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@....com>
[ kamal: backport to 3.13-stable (context) ]
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
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 a1a0350..514a623 100644
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -123,7 +123,7 @@ 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");
- return -EBUSY;
+ return -EIO;
}
/* error */
--
1.9.1
--
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