linux-kernel - [PATCH 5.1 76/96] drm/virtio: move drm_connector_update_edid

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Date:   Mon,  8 Jul 2019 17:13:48 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Max Filippov <jcmvbkbc@...il.com>,
        Gerd Hoffmann <kraxel@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>
Subject: [PATCH 5.1 76/96] drm/virtio: move drm_connector_update_edid_property() call

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

commit 41de4be6f6efa4132b29af51158cd672d93f2543 upstream.

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: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/virtio/virtgpu_vq.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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(s
 	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);