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pch_dma: Use GFP_ATOMIC because called from interrupt context

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pdc_desc_get() is called from pd_prep_slave_sg, and the function is
called from interrupt context(e.g. Uart driver "pch_uart.c").
In fact, I saw kernel error message.
So, GFP_ATOMIC must be used not GFP_NOIO.

Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Tomoya MORINAGA 2013-02-12 11:25:33 +09:00 committed by Vinod Koul
parent 30fb980b99
commit 5c1ef59168
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/pch_dma.c
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@ -476,7 +476,7 @@ static struct pch_dma_desc *pdc_desc_get(struct pch_dma_chan *pd_chan)
dev_dbg(chan2dev(&pd_chan->chan), "scanned %d descriptors\n", i);
if (!ret) {
ret = pdc_alloc_desc(&pd_chan->chan, GFP_NOIO);
ret = pdc_alloc_desc(&pd_chan->chan, GFP_ATOMIC);
if (ret) {
spin_lock(&pd_chan->lock);
pd_chan->descs_allocated++;