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dmaengine: pl330: do not emit loop for 1 byte transfer.

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When there is only one burst required do not emit loop instructions to
loop exactly once. Emit just the body of the loop.

Signed-off-by: Michal Suchanek <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
This commit is contained in:
Michal Suchanek 2015-07-23 18:04:49 +02:00 • committed by Vinod Koul
commit 31495d60a0
1 changed files with 3 additions and 0 deletions
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3
drivers/dma/pl330.c
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@ -1198,6 +1198,9 @@ static inline int _loop(unsigned dry_run, u8 buf[],
unsigned lcnt0, lcnt1, ljmp0, ljmp1;
struct _arg_LPEND lpend;
if (*bursts == 1)
return _bursts(dry_run, buf, pxs, 1);
/* Max iterations possible in DMALP is 256 */
if (*bursts >= 256*256) {
lcnt1 = 256;