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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 v2] drm/hyperv: Added error message for fb size greater then allocated
Date:   Wed,  6 Apr 2022 23:27:07 -0700
Message-Id: <1649312827-728-1-git-send-email-ssengar@linux.microsoft.com>
Precedence: bulk

Added error message when the size of requested framebuffer is more then
the allocated size by vmbus mmio region for framebuffer

Signed-off-by: Saurabh Sengar <ssengar@linux.microsoft.com>
---
v1 -> v2 : Corrected Sign-off

 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..92587f0 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, "hv->hdev, fb size requested by process %s for %d X %d (pitch %d) is greater then allocated size %ld\n",
+		current->comm, fb->width, fb->height, fb->pitches[0], hv->fb_size);
 		return -EINVAL;
+	}
 
 	return 0;
 }
-- 
1.8.3.1