Commit 5c1ef591 authored Feb 12, 2013 by Tomoya MORINAGA Committed by Vinod Koul Apr 15, 2013

pch_dma: Use GFP_ATOMIC because called from interrupt context



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>

parent 30fb980b

drivers/dma/pch_dma.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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++;

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