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authorShawn Guo <shawn.guo@linaro.org>2011-06-30 16:06:33 +0800
committerVinod Koul <vinod.koul@intel.com>2011-07-14 05:00:56 +0530
commit95bfea1675c02d83cf1923272e62f91db11cbb8f (patch)
treee1baec991889d8ad685003f99ac405faa38b0cc7 /drivers/dma
parentb89243dd0e6a1c96a4a346cb3e1ba2c637cdfe98 (diff)
downloadlinux-95bfea1675c02d83cf1923272e62f91db11cbb8f.tar.bz2
dmaengine: mxs-dma: skip request_irq for NO_IRQ
In general, the mxs-dma users get separate irq for each channel, but gpmi is special one which has only one irq shared by all gpmi channels. It causes mxs_dma channel allocation function fail for all other gpmi channels except the first one calling into the function. The patch gets request_irq call skipped for NO_IRQ case, and leaves this gpmi specific quirk to gpmi driver to sort out. It will fix above problem if gpmi driver sets chan_irq as gpmi irq for only one channel and NO_IRQ for all the rest channels. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Cc: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/mxs-dma.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c
index 88aad4f54002..2870d919f112 100644
--- a/drivers/dma/mxs-dma.c
+++ b/drivers/dma/mxs-dma.c
@@ -327,10 +327,12 @@ static int mxs_dma_alloc_chan_resources(struct dma_chan *chan)
memset(mxs_chan->ccw, 0, PAGE_SIZE);
- ret = request_irq(mxs_chan->chan_irq, mxs_dma_int_handler,
- 0, "mxs-dma", mxs_dma);
- if (ret)
- goto err_irq;
+ if (mxs_chan->chan_irq != NO_IRQ) {
+ ret = request_irq(mxs_chan->chan_irq, mxs_dma_int_handler,
+ 0, "mxs-dma", mxs_dma);
+ if (ret)
+ goto err_irq;
+ }
ret = clk_enable(mxs_dma->clk);
if (ret)