Hello.
On 22-05-2013 17:12, Sergei Shtylyov wrote:
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@xxxxxxxxxxxxxxxxxx>
Applied to libata/for-3.10-fixes w/ stable cc'd.
Thanks, I forgot about -stable. Anyway, it doesn't seem that serious
as bmdma_setup() usually shouldn't abort DMA.
Although bmdma_stop() also can stop DMA which is not as improbable
(media errors, etc.). I could have wrotten a better changelog. :-/
Thanks.
WBR, Sergei
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