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DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Mar 2022 14:37:36.2195 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6ad6cebe-b15f-4456-157a-08da004805f7 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: CO1NAM11FT003.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR12MB1131 Subject: [Intel-gfx] [PATCH] drm: remove min_order BUG_ON check 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 , christian.koenig@amd.com, matthew.auld@intel.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" place BUG_ON(order < min_order) outside do..while loop as it fails Unigine Heaven benchmark. Unigine Heaven has buffer allocation requests for example required pages are 161 and alignment request is 128. To allocate the remaining 33 pages, continues the iteration to find the order value which is 5 and when it compares with min_order = 7, enables the BUG_ON(). To avoid this problem, placed the BUG_ON check outside of do..while loop. Signed-off-by: Arunpravin --- drivers/gpu/drm/drm_buddy.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) base-commit: 8025c79350b90e5a8029234d433578f12abbae2b diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c index 72f52f293249..ed94c56b720f 100644 --- a/drivers/gpu/drm/drm_buddy.c +++ b/drivers/gpu/drm/drm_buddy.c @@ -669,10 +669,11 @@ int drm_buddy_alloc_blocks(struct drm_buddy *mm, order = fls(pages) - 1; min_order = ilog2(min_page_size) - ilog2(mm->chunk_size); + BUG_ON(order < min_order); + do { order = min(order, (unsigned int)fls(pages) - 1); BUG_ON(order > mm->max_order); - BUG_ON(order < min_order); do { if (flags & DRM_BUDDY_RANGE_ALLOCATION)