From cf50ccdb765b3a6f1cd8e75642b0439fea0263a5 Mon Sep 17 00:00:00 2001 From: Rob Clark Date: Wed, 25 Mar 2026 11:59:26 -0700 Subject: [PATCH] drm/msm: Reject fb creation from _NO_SHARE objs It would be an error to map these into kms->vm. So reject this as early as possible, when creating an fb. Fixes: b58e12a66e47 ("drm/msm: Add _NO_SHARE flag") Signed-off-by: Rob Clark Patchwork: https://patchwork.freedesktop.org/patch/714264/ Message-ID: <20260325185926.1265661-1-robin.clark@oss.qualcomm.com> --- drivers/gpu/drm/msm/msm_fb.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/msm_fb.c b/drivers/gpu/drm/msm/msm_fb.c index 1eff615ff9bf..ce1725990a48 100644 --- a/drivers/gpu/drm/msm/msm_fb.c +++ b/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; }