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| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2016-04-08 16:25:06 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-13 11:55:56 -0700 |
| commit | 671ffdff5b13314b1fc65d62cf7604b873fb5dc4 (patch) | |
| tree | 47e8cd94ba52bf8d3b3e3de3a4a8f84fd285ebcd | |
| parent | 0d46faca6f887a849efb07c1655b5a9f7c288b45 (diff) | |
| download | linux-671ffdff5b13314b1fc65d62cf7604b873fb5dc4.tar.gz linux-671ffdff5b13314b1fc65d62cf7604b873fb5dc4.tar.bz2 linux-671ffdff5b13314b1fc65d62cf7604b873fb5dc4.zip | |
xhci: resume USB 3 roothub first
Give USB3 devices a better chance to enumerate at USB 3 speeds if
they are connected to a suspended host.
Solves an issue with NEC uPD720200 host hanging when partially
enumerating a USB3 device as USB2 after host controller runtime resume.
Cc: <stable@vger.kernel.org>
Tested-by: Mike Murdoch <main.haarp@gmail.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/host/xhci.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index d51ee0c3cf9f..b60928802686 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1108,8 +1108,8 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated) /* Resume root hubs only when have pending events. */ status = readl(&xhci->op_regs->status); if (status & STS_EINT) { - usb_hcd_resume_root_hub(hcd); usb_hcd_resume_root_hub(xhci->shared_hcd); + usb_hcd_resume_root_hub(hcd); } } @@ -1124,10 +1124,10 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated) /* Re-enable port polling. */ xhci_dbg(xhci, "%s: starting port polling.\n", __func__); - set_bit(HCD_FLAG_POLL_RH, &hcd->flags); - usb_hcd_poll_rh_status(hcd); set_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags); usb_hcd_poll_rh_status(xhci->shared_hcd); + set_bit(HCD_FLAG_POLL_RH, &hcd->flags); + usb_hcd_poll_rh_status(hcd); return retval; } |