tree a2cef08fdbf4f922c10bd9b6ecfd67b5c1d0a4d2
parent 729b0c79c2c0f631bffe1be5abaf291febf7792f
author Guennadi Liakhovetski <g.liakhovetski@gmx.de> 1289474387 +0100
committer Chris Ball <cjb@laptop.org> 1294548748 -0500

mmc: tmio_mmc: fix PIO fallback on DMA descriptor allocation failure

The easiest way to fall back to PIO, when a DMA descriptor allocation
fails is to disable DMA on the controller but continue with the current
request in PIO mode. This way tmio_mmc_start_dma() can become void, since
it cannot be failing any more. The current version is also broken: it is
testing a wrong pointer and thus failing to recognise, that a descriptor
allocation wasn't successful.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>