From: Robert Jarzmik robert.jarzmik@free.fr
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@free.fr Acked-by: Ezequiel Garcia ezequiel@vanguardiasur.com.ar Signed-off-by: Brian Norris computersforpeace@gmail.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- 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,