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From:   Saurabh Sengar <ssengar@linux.microsoft.com>
To:     ssengar@microsoft.com, drawat.floss@gmail.com, airlied@linux.ie,
        daniel@ffwll.ch, linux-hyperv@vger.kernel.org,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
        mikelley@microsoft.com, decui@microsoft.com
Subject: [PATCH v4] drm/hyperv: Add error message for fb size greater than allocated
Date:   Mon, 11 Apr 2022 21:28:59 -0700
Message-Id: <1649737739-10113-1-git-send-email-ssengar@linux.microsoft.com>
Precedence: bulk

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>
---
v3 -> v4 :
	* Shorter error message
	* Alignment match for open parenthesis
	* Added -> Add (typo fix in commit message)

 drivers/gpu/drm/hyperv/hyperv_drm_modeset.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c b/drivers/gpu/drm/hyperv/hyperv_drm_modeset.c
index e82b815..27f4fcb 100644
--- 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;
 }
-- 
1.8.3.1