From: Anthony Yznaga <anthony.yznaga@xxxxxxxxxx> [ Upstream commit ffc95d1b8edb80d2dab77f2e8a823c8d93b06419 ] vfio_find_dma_valid is defined to return WAITED on success if it was necessary to wait. However, the loop forgets the WAITED value returned by vfio_wait() and returns 0 in a later iteration. Fix it. Signed-off-by: Anthony Yznaga <anthony.yznaga@xxxxxxxxxx> Reviewed-by: Steve Sistare <steven.sistare@xxxxxxxxxx> Link: https://lore.kernel.org/r/1629736550-2388-1-git-send-email-anthony.yznaga@xxxxxxxxxx Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/vfio/vfio_iommu_type1.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 0b4f7c174c7a..0e9217687f5c 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -612,17 +612,17 @@ static int vfio_wait(struct vfio_iommu *iommu) static int vfio_find_dma_valid(struct vfio_iommu *iommu, dma_addr_t start, size_t size, struct vfio_dma **dma_p) { - int ret; + int ret = 0; do { *dma_p = vfio_find_dma(iommu, start, size); if (!*dma_p) - ret = -EINVAL; + return -EINVAL; else if (!(*dma_p)->vaddr_invalid) - ret = 0; + return ret; else ret = vfio_wait(iommu); - } while (ret > 0); + } while (ret == WAITED); return ret; } -- 2.30.2
