Commit 30fb980b authored Feb 13, 2013 by Jassi Brar Committed by Vinod Koul Apr 15, 2013

DMA: PL330: allow submitting 2 requests at a time



Fix the logic to allow mc programming of second transfer after first
has been done, by removing immediate return upon success and iterating
until we detect QFull or DMAC dying.

Reported-by: Alvaro Moran <dirac3000@gmail.com>
Tested-by: Alvaro Moran <dirac3000@gmail.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

parent 41ef2d56

drivers/dma/pl330.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -2288,13 +2288,12 @@ static inline void fill_queue(struct dma_pl330_chan *pch)

		/* If already submitted */
		if (desc->status == BUSY)
		break;
		continue;

		ret = pl330_submit_req(pch->pl330_chid,
		&desc->req);
		if (!ret) {
		desc->status = BUSY;
		break;
		} else if (ret == -EAGAIN) {
		/* QFull or DMAC Dying */
		break;