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| author | Olof Johansson <olof@lixom.net> | 2013-01-27 22:07:11 -0800 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2013-01-27 22:07:20 -0800 |
| commit | 6b914c998787d65022e80d6262dfd0edef58cadb (patch) | |
| tree | ec9d9605ae08e6e40664c4302a181979ab4fe1d3 /drivers/usb/host/xhci-ring.c | |
| parent | 1f87a404d02a96519284e1928445ca5cfe9667db (diff) | |
| parent | 949db153b6466c6f7cad5a427ecea94985927311 (diff) | |
| download | olio-linux-3.10-6b914c998787d65022e80d6262dfd0edef58cadb.tar.xz olio-linux-3.10-6b914c998787d65022e80d6262dfd0edef58cadb.zip | |
Merge tag 'v3.8-rc5' into next/cleanup
Linux 3.8-rc5
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index cbb44b7b9d6..59fb5c677db 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1725,6 +1725,15 @@ cleanup: if (bogus_port_status) return; + /* + * xHCI port-status-change events occur when the "or" of all the + * status-change bits in the portsc register changes from 0 to 1. + * New status changes won't cause an event if any other change + * bits are still set. When an event occurs, switch over to + * polling to avoid losing status changes. + */ + xhci_dbg(xhci, "%s: starting port polling.\n", __func__); + set_bit(HCD_FLAG_POLL_RH, &hcd->flags); spin_unlock(&xhci->lock); /* Pass this up to the core */ usb_hcd_poll_rh_status(hcd); |