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| author | Anshuman Gupta <anshuman.gupta@intel.com> | 2018-09-20 19:13:40 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-28 15:04:45 +0200 |
| commit | 330e2d61cdd58363eb5e66b2e72f76fe3c5492e0 (patch) | |
| tree | a52990a0b15d032da2e471caca42e3a80395ecdd /drivers/usb/host/xhci-ring.c | |
| parent | e1c3c7e54ed3655c02248b4f1c7940aff4eecb56 (diff) | |
| download | lwn-330e2d61cdd58363eb5e66b2e72f76fe3c5492e0.tar.gz lwn-330e2d61cdd58363eb5e66b2e72f76fe3c5492e0.zip | |
xhci: Avoid USB autosuspend when resuming USB2 ports.
When USB bus host controller root hub resumes from autosuspend,
it immediately tries to enter auto-suspend, but there can be a
scenario when root hub is resuming its usb2 ports, in that particular
case USB host controller auto suspend fails since it is busy
to resuming its usb2 ports.
This makes multiple failed cycles of auto-suspend until all usb2
ports of host controller root hub do not resume.
This patch uses USB core framework usb_hcd_start_port_resume,
usb_hcd_end_port_resume API's in order to autoresume/autosuspend
root hub properly.
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index c41341ea8449..a8d92c90fb58 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -1606,6 +1606,7 @@ static void handle_port_status(struct xhci_hcd *xhci, set_bit(HCD_FLAG_POLL_RH, &hcd->flags); mod_timer(&hcd->rh_timer, bus_state->resume_done[hcd_portnum]); + usb_hcd_start_port_resume(&hcd->self, hcd_portnum); bogus_port_status = true; } } |