| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.10 40/69] xen, fbfront: fix connecting to backend | Date | Wed, 19 Apr 2017 16:37:09 +0200 |
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4.10-stable review patch. If anyone has any objections, please let me know.
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From: Juergen Gross <jgross@suse.com>
commit 9121b15b5628b38b4695282dc18c553440e0f79b upstream.
Connecting to the backend isn't working reliably in xen-fbfront: in case XenbusStateInitWait of the backend has been missed the backend transition to XenbusStateConnected will trigger the connected state only without doing the actions required when the backend has connected.
Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/video/fbdev/xen-fbfront.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/video/fbdev/xen-fbfront.c +++ b/drivers/video/fbdev/xen-fbfront.c @@ -643,7 +643,6 @@ static void xenfb_backend_changed(struct break; case XenbusStateInitWait: -InitWait: xenbus_switch_state(dev, XenbusStateConnected); break; @@ -654,7 +653,8 @@ InitWait: * get Connected twice here. */ if (dev->state != XenbusStateConnected) - goto InitWait; /* no InitWait seen yet, fudge it */ + /* no InitWait seen yet, fudge it */ + xenbus_switch_state(dev, XenbusStateConnected); if (xenbus_read_unsigned(info->xbdev->otherend, "request-update", 0))
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