Input: xen-kbdfront - fix mouse getting stuck after save/restore
Mouse gets "stuck" after restore of PV guest but buttons are in working condition. If driver has been configured for ABS coordinates at start it will get XENKBD_TYPE_POS events and then suddenly after restore it'll start getting XENKBD_TYPE_MOTION events, that will be dropped later and they won't get into user-space. Regression was introduced by hunk 5 and 6 of 5ea5254aa0ad269cfbd2875c973ef25ab5b5e9db ("Input: xen-kbdfront - advertise either absolute or relative coordinates"). Driver on restore should ask xen for request-abs-pointer again if it is available. So restore parts that did it before 5ea5254. Acked-by: Olaf Hering <olaf@aepfle.de> Signed-off-by: Igor Mammedov <imammedo@redhat.com> [v1: Expanded the commit description] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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@ -303,7 +303,7 @@ static void xenkbd_backend_changed(struct xenbus_device *dev,
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enum xenbus_state backend_state)
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{
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struct xenkbd_info *info = dev_get_drvdata(&dev->dev);
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int val;
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int ret, val;
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switch (backend_state) {
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case XenbusStateInitialising:
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@ -316,6 +316,17 @@ static void xenkbd_backend_changed(struct xenbus_device *dev,
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case XenbusStateInitWait:
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InitWait:
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ret = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
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"feature-abs-pointer", "%d", &val);
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if (ret < 0)
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val = 0;
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if (val) {
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ret = xenbus_printf(XBT_NIL, info->xbdev->nodename,
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"request-abs-pointer", "1");
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if (ret)
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pr_warning("xenkbd: can't request abs-pointer");
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}
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xenbus_switch_state(dev, XenbusStateConnected);
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break;
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