drm/hyperv: Add error message for fb size greater than allocated

Add error message when the size of requested framebuffer is more than
the allocated size by vmbus mmio region for framebuffer.

Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Link: https://lore.kernel.org/r/1649737739-10113-1-git-send-email-ssengar@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>

diff --git a/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c b/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
index e82b815f83a65567564c7d858bf45de59917f924..27f4fcb058f93ece83338829f1e960e918e2cc87 100644 (file)
--- a/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
+++ b/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
@@ -123,8 +123,11 @@ static int hyperv_pipe_check(struct drm_simple_display_pipe *pipe,
        if (fb->format->format != DRM_FORMAT_XRGB8888)
                return -EINVAL;
 
-       if (fb->pitches[0] * fb->height > hv->fb_size)
+       if (fb->pitches[0] * fb->height > hv->fb_size) {
+               drm_err(&hv->dev, "fb size requested by %s for %dX%d (pitch %d) greater than %ld\n",
+                       current->comm, fb->width, fb->height, fb->pitches[0], hv->fb_size);
                return -EINVAL;
+       }
 
        return 0;
 }