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Fix dma_unmap_sg() nents value

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[ Upstream commit 1db50f7b7a ]

The dma_unmap_sg() functions should be called with the same nents as the
dma_map_sg(), not the value the map function returned.

Fixes: ed10435d35 ("RDMA/erdma: Implement hierarchical MTT")
Signed-off-by: Thomas Fourier <fourier.thomas@gmail.com>
Link: https://patch.msgid.link/20250630092346.81017-2-fourier.thomas@gmail.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Thomas Fourier 2025-06-30 11:23:46 +02:00 committed by Greg Kroah-Hartman
parent 8724a228be
commit a99cae46ab
1 changed files with 2 additions and 1 deletions
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3
drivers/infiniband/hw/erdma/erdma_verbs.c
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@ -585,7 +585,8 @@ err_free_mtt:
static void erdma_destroy_mtt_buf_sg(struct erdma_dev *dev,
struct erdma_mtt *mtt)
{
dma_unmap_sg(&dev->pdev->dev, mtt->sglist, mtt->nsg, DMA_TO_DEVICE);
dma_unmap_sg(&dev->pdev->dev, mtt->sglist,
DIV_ROUND_UP(mtt->size, PAGE_SIZE), DMA_TO_DEVICE);
vfree(mtt->sglist);
}