Patchwork [3.8.y.z,extended,stable] Patch "pch_dma: Use GFP_ATOMIC because called from interrupt context" has been added to staging queue

mail settings
Submitter Kamal Mostafa
Date May 24, 2013, 5:37 p.m.
Message ID <>
Download mbox | patch
Permalink /patch/246261/
State New
Headers show


Kamal Mostafa - May 24, 2013, 5:37 p.m.
This is a note to let you know that I have just added a patch titled

    pch_dma: Use GFP_ATOMIC because called from interrupt context

to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree 
which can be found at:;a=shortlog;h=refs/heads/linux-3.8.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.8.y.z tree, see



From 4e1c06e8d04140f1349156f4c23158f54e14b351 Mon Sep 17 00:00:00 2001
From: Tomoya MORINAGA <>
Date: Tue, 12 Feb 2013 11:25:33 +0900
Subject: pch_dma: Use GFP_ATOMIC because called from interrupt context

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 <>
Signed-off-by: Vinod Koul <>
Signed-off-by: Kamal Mostafa <>
 drivers/dma/pch_dma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)



diff --git a/drivers/dma/pch_dma.c b/drivers/dma/pch_dma.c
index 3f26172..34c36ec 100644
--- a/drivers/dma/pch_dma.c
+++ b/drivers/dma/pch_dma.c
@@ -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) {