From: Colin Ian King colin.king@canonical.com

Currently the check that the unsigned size_t variable i is >= 0 is always true because the unsigned variable will never be negative, causing the loop to run forever. Fix this by changing the pre-decrement check to a zero check on i followed by a decrement of i.

Addresses-Coverity: ("Unsigned compared against 0") Fixes: 400b65cb5acb ("drm/i915: use vmap in shmem_pin_map") Signed-off-by: Colin Ian King colin.king@canonical.com --- drivers/gpu/drm/i915/gt/shmem_utils.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/shmem_utils.c b/drivers/gpu/drm/i915/gt/shmem_utils.c index f011ea42487e..30cc56fa191f 100644 --- a/drivers/gpu/drm/i915/gt/shmem_utils.c +++ b/drivers/gpu/drm/i915/gt/shmem_utils.c @@ -73,7 +73,7 @@ void *shmem_pin_map(struct file *file) mapping_set_unevictable(file->f_mapping); return vaddr; err_page: - while (--i >= 0) + while (i--) put_page(pages[i]); kvfree(pages); return NULL;