4.9-stable review patch. If anyone has any objections, please let me know.
------------------ From: Dan Carpenter <[email protected]> commit 24c790fbf5d8f54c8c82979db11edea8855b74bf upstream. We should set "ret" to -EINVAL if iommu_group_get() fails. Fixes: 55c99a4dc50f ("iommu/amd: Use iommu_attach_group()") Signed-off-by: Dan Carpenter <[email protected]> Signed-off-by: Joerg Roedel <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/iommu/amd_iommu_v2.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/iommu/amd_iommu_v2.c +++ b/drivers/iommu/amd_iommu_v2.c @@ -805,8 +805,10 @@ int amd_iommu_init_device(struct pci_dev goto out_free_domain; group = iommu_group_get(&pdev->dev); - if (!group) + if (!group) { + ret = -EINVAL; goto out_free_domain; + } ret = iommu_attach_group(dev_state->domain, group); if (ret != 0)
