tree cc850e7b524bc90c7e17ee881caf3aeccf0bf601
parent e771451c0a831d96a7c14b0ca8a8ec671d98567b
author Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> 1369163274 +0400
committer Tejun Heo <tj@kernel.org> 1369179560 +0900

sata_rcar: clear STOP bit in bmdma_start() method

Iff bmdma_setup() has to stop a DMA transfer before starting a new
one, then the STOP bit in the ATAPI_CONTROL1 register will remain set
(it's only cleared when setting the START bit to 1) and then
bmdma_start() method will set both START and STOP bits simultaneously
which should abort the transfer being just started.  Avoid that by
explicitly clearing the STOP bit in bmdma_start() method (in this case
it will be ignored on write).

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org