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Date: Mon, 2 May 2016 17:10:14 -0700 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Mike Murdoch <main.haarp@...il.com>, Mathias Nyman <mathias.nyman@...ux.intel.com> Subject: [PATCH 4.5 015/200] xhci: resume USB 3 roothub first 4.5-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mathias Nyman <mathias.nyman@...ux.intel.com> commit 671ffdff5b13314b1fc65d62cf7604b873fb5dc4 upstream. 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. Tested-by: Mike Murdoch <main.haarp@...il.com> Signed-off-by: Mathias Nyman <mathias.nyman@...ux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/usb/host/xhci.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1108,8 +1108,8 @@ int xhci_resume(struct xhci_hcd *xhci, b /* 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, b /* 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; }
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