Messages in this thread Patch in this message | | | From | Jiasheng Jiang <> | Subject | [PATCH] iommu/ipmmu-vmsa: Check for error num after setting mask | Date | Thu, 6 Jan 2022 10:43:02 +0800 |
| |
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: 1c894225bf5b ("iommu/ipmmu-vmsa: IPMMU device is 40-bit bus master") Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> --- drivers/iommu/ipmmu-vmsa.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index aaa6a4d59057..7df5da44a004 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -1003,7 +1003,9 @@ 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); -- 2.25.1
| |