From: Dave Airlie <airlied@redhat.com>
Date: Fri, 4 Apr 2014 01:34:37 +0000 (+1000)
Subject: drm/dp_helper: don't return EPROTO for defers (v2)
X-Git-Tag: v3.15-rc1~51^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aa17edff0afa893b5ab1dd60d842cc6f42e847b4;p=pandora-kernel.git

drm/dp_helper: don't return EPROTO for defers (v2)

If we get a msg.reply of REPLY_DEFER, we also get an err of 0
so we fail reads with 0 < size and return -EPROTO instead of trying
again.

v2: same fix in i2c code.

Found writing MST support.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

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