linux-kernel - [PATCH 2/4] drm/virtio: Wake up all waiters when capset response comes in.

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Message-Id: <20190605234423.11348-2-davidriley@chromium.org>
Date:   Wed,  5 Jun 2019 16:44:21 -0700
From:   davidriley@...omium.org
To:     dri-devel@...ts.freedesktop.org,
        virtualization@...ts.linux-foundation.org
Cc:     David Airlie <airlied@...ux.ie>, Gerd Hoffmann <kraxel@...hat.com>,
        Daniel Vetter <daniel@...ll.ch>, linux-kernel@...r.kernel.org,
        David Riley <davidriley@...omium.org>
Subject: [PATCH 2/4] drm/virtio: Wake up all waiters when capset response comes in.

From: David Riley <davidriley@...omium.org>

If multiple callers occur simultaneously, wake them all up.

Signed-off-by: David Riley <davidriley@...omium.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 e62fe24b1a2e..da71568adb9a 100644
--- a/drivers/gpu/drm/virtio/virtgpu_vq.c
+++ b/drivers/gpu/drm/virtio/virtgpu_vq.c
@@ -588,7 +588,7 @@ static void virtio_gpu_cmd_capset_cb(struct virtio_gpu_device *vgdev,
 		}
 	}
 	spin_unlock(&vgdev->display_info_lock);
-	wake_up(&vgdev->resp_wq);
+	wake_up_all(&vgdev->resp_wq);
 }
 
 static int virtio_get_edid_block(void *data, u8 *buf,
-- 
2.22.0.rc1.311.g5d7573a151-goog