iommufd: Report unmapped bytes in the error path of iopt_unmap_iova_range

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commit b23e09f999 upstream.

There are callers that read the unmapped bytes even when rc != 0. Thus, do
not forget to report it in the error path too.

Fixes: 8d40205f60 ("iommufd: Add kAPI toward external drivers for kernel access")
Link: https://patch.msgid.link/r/e2b61303bbc008ba1a4e2d7c2a2894749b59fdac.1752126748.git.nicolinc@nvidia.com
Cc: stable@vger.kernel.org
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Nicolin Chen 2025-07-09 22:58:53 -07:00 • committed by Greg Kroah-Hartman

parent c629633706

commit 91b0eca73d

1 changed files with 5 additions and 2 deletions

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drivers/iommu/iommufd/io_pagetable.c

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