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DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Mar 2022 19:41:10.3049 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7f6d34e3-b6f9-4d70-1f0a-08da05f29739 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT029.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB5886 Subject: [Intel-gfx] [PATCH] drm: Fix a infinite loop condition when order becomes 0 X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alexander.deucher@amd.com, Arunpravin , matthew.auld@intel.com, christian.koenig@amd.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" handle a situation in the condition order-- == min_order, when 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 Signed-off-by: Arunpravin --- 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; }