This is a note to let you know that I've just added the patch titled
pch_dma: Use GFP_ATOMIC because called from interrupt context
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pch_dma-use-gfp_atomic-because-called-from-interrupt-context.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5c1ef59168c485318e40ba485c1eba57d81d0faa Mon Sep 17 00:00:00 2001
From: Tomoya MORINAGA <tomoya.rohm@xxxxxxxxx>
Date: Tue, 12 Feb 2013 11:25:33 +0900
Subject: pch_dma: Use GFP_ATOMIC because called from interrupt context
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: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -476,7 +476,7 @@ 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++;
Patches currently in stable-queue which might be from tomoya.rohm@xxxxxxxxx are
queue-3.4/pch_dma-use-gfp_atomic-because-called-from-interrupt-context.patch
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