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DMA: PL330: allow submitting 2 requests at a time

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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>
This commit is contained in:
Jassi Brar
2013-02-13 16:13:14 +05:30
committed by Vinod Koul
parent 41ef2d5678
commit 30fb980b99
1 changed files with 1 additions and 2 deletions
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3
drivers/dma/pl330.c
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@@ -2288,13 +2288,12 @@ static inline void fill_queue(struct dma_pl330_chan *pch)
/* If already submitted */ /* If already submitted */
if (desc->status == BUSY) if (desc->status == BUSY)
break; continue;
ret = pl330_submit_req(pch->pl330_chid, ret = pl330_submit_req(pch->pl330_chid,
&desc->req); &desc->req);
if (!ret) { if (!ret) {
desc->status = BUSY; desc->status = BUSY;
break;
} else if (ret == -EAGAIN) { } else if (ret == -EAGAIN) {
/* QFull or DMAC Dying */ /* QFull or DMAC Dying */
break; break;