This is a note to let you know that I've just added the patch titled
iommu/ipmmu-vmsa: Check for error num after setting mask
to the 5.17-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iommu-ipmmu-vmsa-check-for-error-num-after-setting-m.patch
and it can be found in the queue-5.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 436ce559b5f7904e5a94c35f684bdad02f7b7e9f
Author: Jiasheng Jiang <jiasheng@xxxxxxxxxxx>
Date: Thu Jan 6 10:43:02 2022 +0800
iommu/ipmmu-vmsa: Check for error num after setting mask
[ Upstream commit 1fdbbfd5099f797a4dac05e7ef0192ba4a9c39b4 ]
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@xxxxxxxxxxx>
Reviewed-by: Nikita Yushchenko <nikita.yoush@xxxxxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220106024302.2574180-1-jiasheng@xxxxxxxxxxx
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index ca752bdc710f..61bd9a3004ed 100644
--- a/drivers/iommu/ipmmu-vmsa.c
+++ b/drivers/iommu/ipmmu-vmsa.c
@@ -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);
