[PATCH 3.18 52/60] drm/mst: Fix error handling during MST sideband message reception

3.18-stable review patch. If anyone has any objections, please let me know. -- From: Imre Deak commit 448421b5e93b9177c5698f0cf6f5e72d2995eeca upstream. Handle any error due to partial reads, timeouts etc. to avoid parsing uninitialized data subsequently.

[PATCH 3.18 52/60] drm/mst: Fix error handling during MST sideband message reception

3.18-stable review patch. If anyone has any objections, please let me know. -- From: Imre Deak commit 448421b5e93b9177c5698f0cf6f5e72d2995eeca upstream. Handle any error due to partial reads, timeouts etc. to avoid parsing uninitialized data subsequently. Also bail out if the