[PATCH v2] drm: Fix a infinite loop condition when order becomes 0

[Arunpravin Paneer Selvam]

handle a situation in the condition order-- == min_order,
when order = 0 and min_order = 0, leading to order = -1,
it now won't exit the loop. To avoid this problem,
added a order check in the same condition, (i.e)
when order is 0, we return -ENOSPC

v2: use full name in email program and in Signed-off tag

Signed-off-by: Arunpravin Paneer Selvam <arunpravin.paneersel...@amd.com>
---
 drivers/gpu/drm/drm_buddy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c
index 72f52f293249..5ab66aaf2bbd 100644
--- a/drivers/gpu/drm/drm_buddy.c
+++ b/drivers/gpu/drm/drm_buddy.c
@@ -685,7 +685,7 @@ int drm_buddy_alloc_blocks(struct drm_buddy *mm,
                        if (!IS_ERR(block))
                                break;
 
-                       if (order-- == min_order) {
+                       if (!order || order-- == min_order) {
                                err = -ENOSPC;
                                goto err_free;
                        }

base-commit: 3bd60c0259406c5ca3ce5cdc958fb910ad4b8175
-- 
2.25.1