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From:   Dmitry Osipenko <dmitry.osipenko@collabora.com>
To:     David Airlie <airlied@linux.ie>, Gerd Hoffmann <kraxel@redhat.com>,
        Gurchetan Singh <gurchetansingh@chromium.org>,
        Chia-I Wu <olvaffe@gmail.com>, Daniel Vetter <daniel@ffwll.ch>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        Emil Velikov <emil.l.velikov@gmail.com>,
        Robin Murphy <robin.murphy@arm.com>,
        =?UTF-8?q?Thomas=20Hellstr=C3=B6m?= <thomas_os@shipmail.org>
Cc:     dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
        virtualization@lists.linux-foundation.org,
        Dmitry Osipenko <digetx@gmail.com>, kernel@collabora.com
Subject: [PATCH v7 9/9] drm/virtio: Return proper error codes instead of -1
Date:   Thu, 30 Jun 2022 23:07:26 +0300
Message-Id: <20220630200726.1884320-10-dmitry.osipenko@collabora.com>
In-Reply-To: <20220630200726.1884320-1-dmitry.osipenko@collabora.com>
References: <20220630200726.1884320-1-dmitry.osipenko@collabora.com>
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Don't return -1 in error cases, return proper error code. The returned
error codes propagate to error messages and to userspace and it's always
good to have a meaningful error number for debugging purposes.

Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
---
 drivers/gpu/drm/virtio/virtgpu_vq.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c
index ee84256946ab..9ff8660b50ad 100644
--- a/drivers/gpu/drm/virtio/virtgpu_vq.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
@@ -322,7 +322,7 @@ static int virtio_gpu_queue_ctrl_sgs(struct virtio_gpu_device *vgdev,
 		if (fence && vbuf->objs)
 			virtio_gpu_array_unlock_resv(vbuf->objs);
 		free_vbuf(vgdev, vbuf);
-		return -1;
+		return -ENODEV;
 	}
 
 	if (vgdev->has_indirect)
@@ -386,7 +386,7 @@ static int virtio_gpu_queue_fenced_ctrl_buffer(struct virtio_gpu_device *vgdev,
 			if (!sgt) {
 				if (fence && vbuf->objs)
 					virtio_gpu_array_unlock_resv(vbuf->objs);
-				return -1;
+				return -ENOMEM;
 			}
 
 			elemcnt += sg_ents;
@@ -720,7 +720,7 @@ static int virtio_get_edid_block(void *data, u8 *buf,
 	size_t start = block * EDID_LENGTH;
 
 	if (start + len > le32_to_cpu(resp->size))
-		return -1;
+		return -EINVAL;
 	memcpy(buf, resp->edid + start, len);
 	return 0;
 }
-- 
2.36.1