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iommu/ipmmu-vmsa: Check for error num after setting mask

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[ Upstream commit 1fdbbfd509 ]

Because of the possible failure of the dma_supported(), the
dma_set_mask_and_coherent() may return error num.
Therefore, it should be better to check it and return the error if
fails.

Fixes: 1c894225bf ("iommu/ipmmu-vmsa: IPMMU device is 40-bit bus master")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Link: https://lore.kernel.org/r/20220106024302.2574180-1-jiasheng@iscas.ac.cn
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jiasheng Jiang 2022-01-06 10:43:02 +08:00 committed by Greg Kroah-Hartman
parent 904e163aac
commit 1de0860a10
1 changed files with 3 additions and 1 deletions
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4
drivers/iommu/ipmmu-vmsa.c
View file

@ -1006,7 +1006,9 @@ static int ipmmu_probe(struct platform_device *pdev)
bitmap_zero(mmu->ctx, IPMMU_CTX_MAX);
mmu->features = of_device_get_match_data(&pdev->dev);
memset(mmu->utlb_ctx, IPMMU_CTX_INVALID, mmu->features->num_utlbs);
dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
if (ret)
return ret;
/* Map I/O memory and request IRQ. */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);