xen, fbfront: fix connecting to backend
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. Cc: stable@vger.kernel.org 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>
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@ -643,7 +643,6 @@ static void xenfb_backend_changed(struct xenbus_device *dev,
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break;
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break;
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case XenbusStateInitWait:
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case XenbusStateInitWait:
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InitWait:
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xenbus_switch_state(dev, XenbusStateConnected);
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xenbus_switch_state(dev, XenbusStateConnected);
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break;
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break;
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@ -654,7 +653,8 @@ InitWait:
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* get Connected twice here.
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* get Connected twice here.
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*/
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*/
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if (dev->state != XenbusStateConnected)
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if (dev->state != XenbusStateConnected)
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goto InitWait; /* no InitWait seen yet, fudge it */
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/* no InitWait seen yet, fudge it */
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xenbus_switch_state(dev, XenbusStateConnected);
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if (xenbus_read_unsigned(info->xbdev->otherend,
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if (xenbus_read_unsigned(info->xbdev->otherend,
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"request-update", 0))
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"request-update", 0))
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