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skd: fix unchecked return values 

Check return values of dma_set_mask_and_coherent().

Otherwise, if dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
fails, the following piece of code will be executed even when the call
to dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); returns 0:

dev_err(&pdev->dev, "DMA mask error %d\n", rc);
goto err_out_regions;

Addresses-Coverity-ID: 1474553 ("Unchecked return value")
Fixes: 1381262148 ("skd: switch to the generic DMA API")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Gustavo A. R. Silva 2018-10-19 20:44:17 +02:00 committed by Jens Axboe
parent f92898e7f3
commit d91dc172e3
1 changed files with 2 additions and 2 deletions
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4
drivers/block/skd_main.c
View File

@ -3175,7 +3175,7 @@ static int skd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto err_out;
rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (rc)
dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (rc) {
dev_err(&pdev->dev, "DMA mask error %d\n", rc);
goto err_out_regions;
@ -3364,7 +3364,7 @@ static int skd_pci_resume(struct pci_dev *pdev)
goto err_out;
rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (rc)
dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
rc = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (rc) {
dev_err(&pdev->dev, "DMA mask error %d\n", rc);
goto err_out_regions;