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mtd: nand: omap2: Don't call dma_release_channel() if dma_request_chan() failed

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dma_request_chan() can fail returning an error pointer. In this case
prevent calling dma_release_channel() to prevent a ERR_PTR() dereference.

As error path can be called even with no DMA configuration, info->dma can
be NULL so don't call dma_release_channel() for that case either.

Fixes: de3bfc4a16: ("mtd: nand: omap2: fix return value check in omap_nand_probe()")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Roger Quadros 2016-08-15 10:47:39 +03:00 committed by Brian Norris
parent 29b4817d40
commit a93295a7e1
1 changed files with 1 additions and 1 deletions
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2
drivers/mtd/nand/omap2.c
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@ -2169,7 +2169,7 @@ static int omap_nand_probe(struct platform_device *pdev)
return 0;
return_error:
if (info->dma)
if (!IS_ERR_OR_NULL(info->dma))
dma_release_channel(info->dma);
if (nand_chip->ecc.priv) {
nand_bch_free(nand_chip->ecc.priv);