drm/msm: Reject fb creation from _NO_SHARE objs

[ Upstream commit cf50ccd ]

It would be an error to map these into kms->vm.  So reject this as early
as possible, when creating an fb.

Fixes: b58e12a ("drm/msm: Add _NO_SHARE flag")
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/714264/
Message-ID: <20260325185926.1265661-1-robin.clark@oss.qualcomm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: Rob Clark

drivers/gpu/drm/msm/msm_fb.c

@@ -219,7 +219,12 @@ static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
 			 + mode_cmd->offsets[i];
 
 		if (bos[i]->size < min_size) {
-			ret = -EINVAL;
+			ret = UERR(EINVAL, dev, "plane %d too small", i);
+			goto fail;
+		}
+
+		if (to_msm_bo(bos[i])->flags & MSM_BO_NO_SHARE) {
+			ret = UERR(EINVAL, dev, "Cannot map _NO_SHARE to kms vm");
 			goto fail;
 		}