Commit 31495d60 authored Jul 23, 2015 by Michal Suchanek Committed by Vinod Koul Aug 19, 2015

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



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 <hramrach@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

parent 2f27b81c

drivers/dma/pl330.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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 >= 256256) {
		lcnt1 = 256;