[74/94] pch_dma: Use GFP_ATOMIC because called from interrupt context

[Ben Hutchings]

3.2.46-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Tomoya MORINAGA <tomoya.rohm@xxxxxxxxx>

commit 5c1ef59168c485318e40ba485c1eba57d81d0faa upstream.

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@xxxxxxxxx>
Signed-off-by: Vinod Koul <vinod.koul@xxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 drivers/dma/pch_dma.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/dma/pch_dma.c
+++ b/drivers/dma/pch_dma.c
@@ -489,7 +489,7 @@ static struct pch_dma_desc *pdc_desc_get
 	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++;

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/