linux-kernel - [PATCH AUTOSEL 5.1 03/11] drm/virtio: move drm_connector_update_edid

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Date:   Wed, 10 Jul 2019 11:02:30 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Gerd Hoffmann <kraxel@...hat.com>,
        Max Filippov <jcmvbkbc@...il.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Sasha Levin <sashal@...nel.org>,
        dri-devel@...ts.freedesktop.org,
        virtualization@...ts.linux-foundation.org
Subject: [PATCH AUTOSEL 5.1 03/11] drm/virtio: move drm_connector_update_edid_property() call

From: Gerd Hoffmann <kraxel@...hat.com>

[ Upstream commit 41de4be6f6efa4132b29af51158cd672d93f2543 ]

drm_connector_update_edid_property can sleep, we must not
call it while holding a spinlock.  Move the callsite.

Fixes: b4b01b4995fb ("drm/virtio: add edid support")
Reported-by: Max Filippov <jcmvbkbc@...il.com>
Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
Tested-by: Max Filippov <jcmvbkbc@...il.com>
Tested-by: Cornelia Huck <cohuck@...hat.com>
Acked-by: Cornelia Huck <cohuck@...hat.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20190405044602.2334-1-kraxel@redhat.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/virtio/virtgpu_vq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_vq.c b/drivers/gpu/drm/virtio/virtgpu_vq.c
index 6bc2008b0d0d..3ef24f89ef93 100644
--- a/drivers/gpu/drm/virtio/virtgpu_vq.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
@@ -620,11 +620,11 @@ static void virtio_gpu_cmd_get_edid_cb(struct virtio_gpu_device *vgdev,
 	output = vgdev->outputs + scanout;
 
 	new_edid = drm_do_get_edid(&output->conn, virtio_get_edid_block, resp);
+	drm_connector_update_edid_property(&output->conn, new_edid);
 
 	spin_lock(&vgdev->display_info_lock);
 	old_edid = output->edid;
 	output->edid = new_edid;
-	drm_connector_update_edid_property(&output->conn, output->edid);
 	spin_unlock(&vgdev->display_info_lock);
 
 	kfree(old_edid);
-- 
2.20.1