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mtd: nand: sh_flctl: use dma_mapping_error to check map errors

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The return value of dma_map_single() should be checked by
dma_mapping_error(). However, in function flctl_dma_fifo0_transfer(), its
return value is checked against NULL, which could result in failures.

Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
This commit is contained in:
Pan Bian 2017-08-08 22:35:42 +08:00 committed by Boris Brezillon
parent 892dd18313
commit dbf5f6424e
1 changed files with 1 additions and 1 deletions
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2
drivers/mtd/nand/sh_flctl.c
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@ -411,7 +411,7 @@ static int flctl_dma_fifo0_transfer(struct sh_flctl *flctl, unsigned long *buf,
dma_addr = dma_map_single(chan->device->dev, buf, len, dir);
if (dma_addr)
if (!dma_mapping_error(chan->device->dev, dma_addr))
desc = dmaengine_prep_slave_single(chan, dma_addr, len,
tr_dir, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);