[PATCH 3/5] gpu: drm: amdgpu: Replace snprintf() with sysfs_emit()

[Sumera Priyadarsini]

Using snprintf() for show() methods holds the risk of buffer overrun
as snprintf() does not know the PAGE_SIZE maximum of the temporary
buffer used to output sysfs content.

Modify amdgpu_gtt_mgr.c to use sysfs_emit() instead which knows the
size of the temporary buffer.

Issue found with Coccinelle.

Signed-off-by: Sumera Priyadarsini <sylphrenadin at gmail.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
index 1721739def84..441e07ee1967 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
@@ -49,7 +49,7 @@ static ssize_t amdgpu_mem_info_gtt_total_show(struct device *dev,
 	struct amdgpu_device *adev = drm_to_adev(ddev);
 	struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
 
-	return snprintf(buf, PAGE_SIZE, "%llu\n",
+	return sysfs_emit(buf, PAGE_SIZE, "%llu\n",
 			man->size * PAGE_SIZE);
 }
 
@@ -68,7 +68,7 @@ static ssize_t amdgpu_mem_info_gtt_used_show(struct device *dev,
 	struct amdgpu_device *adev = drm_to_adev(ddev);
 	struct ttm_resource_manager *man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
 
-	return snprintf(buf, PAGE_SIZE, "%llu\n",
+	return sysfs_emit(buf, PAGE_SIZE, "%llu\n",
 			amdgpu_gtt_mgr_usage(man));
 }
 
-- 
2.25.1