This is a note to let you know that I've just added the patch titled
mtd: nand: pxa3xx_nand: fix dmaengine initialization
to the 4.4-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:
mtd-nand-pxa3xx_nand-fix-dmaengine-initialization.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9097103f06332d099c5ab06d1e7f22f4bcaca6e2 Mon Sep 17 00:00:00 2001
From: Robert Jarzmik <robert.jarzmik@xxxxxxx>
Date: Fri, 12 Feb 2016 23:29:04 +0100
Subject: mtd: nand: pxa3xx_nand: fix dmaengine initialization
From: Robert Jarzmik <robert.jarzmik@xxxxxxx>
commit 9097103f06332d099c5ab06d1e7f22f4bcaca6e2 upstream.
When the driver is initialized in a pure device-tree platform, the
driver's probe fails allocating the dma channel :
[ 525.624435] pxa3xx-nand 43100000.nand: no resource defined for data DMA
[ 525.632088] pxa3xx-nand 43100000.nand: alloc nand resource failed
The reason is that the DMA IO resource is not acquired through platform
resources but by OF bindings.
Fix this by ensuring that DMA IO resources are only queried in the non
device-tree case.
Fixes: 8f5ba31aa565 ("mtd: nand: pxa3xx-nand: switch to dmaengine")
Signed-off-by: Robert Jarzmik <robert.jarzmik@xxxxxxx>
Acked-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Brian Norris <computersforpeace@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mtd/nand/pxa3xx_nand.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -1750,7 +1750,7 @@ static int alloc_nand_resource(struct pl
if (ret < 0)
return ret;
- if (use_dma) {
+ if (!np && use_dma) {
r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (r == NULL) {
dev_err(&pdev->dev,
Patches currently in stable-queue which might be from robert.jarzmik@xxxxxxx are
queue-4.4/dmaengine-pxa_dma-fix-the-maximum-requestor-line.patch
queue-4.4/mtd-nand-pxa3xx_nand-fix-dmaengine-initialization.patch
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