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mtd: nand: pxa3xx_nand: fix dmaengine initialization 

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: 8f5ba31aa5 ("mtd: nand: pxa3xx-nand: switch to dmaengine")
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Robert Jarzmik 2016-02-12 23:29:04 +01:00 committed by Brian Norris
parent f671a1f380
commit 9097103f06
1 changed files with 1 additions and 1 deletions
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2
drivers/mtd/nand/pxa3xx_nand.c
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@ -1795,7 +1795,7 @@ static int alloc_nand_resource(struct platform_device *pdev)
if (ret < 0) if (ret < 0)
return ret; return ret;
if (use_dma) { if (!np && use_dma) {
r = platform_get_resource(pdev, IORESOURCE_DMA, 0); r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (r == NULL) { if (r == NULL) {
dev_err(&pdev->dev, dev_err(&pdev->dev,