The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 83810f84ecf11dfc5a9414a8b762c3501b328185 Mon Sep 17 00:00:00 2001 From: Mathias Nyman mathias.nyman@linux.intel.com Date: Thu, 23 Jun 2022 14:19:43 +0300 Subject: [PATCH] xhci: turn off port power in shutdown
If ports are not turned off in shutdown then runtime suspended self-powered USB devices may survive in U3 link state over S5.
During subsequent boot, if firmware sends an IPC command to program the port in DISCONNECT state, it will time out, causing significant delay in the boot time.
Turning off roothub port power is also recommended in xhci specification 4.19.4 "Port Power" in the additional note.
Cc: stable@vger.kernel.org Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com Link: https://lore.kernel.org/r/20220623111945.1557702-3-mathias.nyman@linux.intel... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index c54f2bc23d3f..0fdc014c9401 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -652,7 +652,7 @@ struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd) * It will release and re-aquire the lock while calling ACPI * method. */ -static void xhci_set_port_power(struct xhci_hcd *xhci, struct usb_hcd *hcd, +void xhci_set_port_power(struct xhci_hcd *xhci, struct usb_hcd *hcd, u16 index, bool on, unsigned long *flags) __must_hold(&xhci->lock) { diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index cb99bed5f755..65858f607437 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -791,6 +791,8 @@ static void xhci_stop(struct usb_hcd *hcd) void xhci_shutdown(struct usb_hcd *hcd) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); + unsigned long flags; + int i;
if (xhci->quirks & XHCI_SPURIOUS_REBOOT) usb_disable_xhci_ports(to_pci_dev(hcd->self.sysdev)); @@ -806,12 +808,21 @@ void xhci_shutdown(struct usb_hcd *hcd) del_timer_sync(&xhci->shared_hcd->rh_timer); }
- spin_lock_irq(&xhci->lock); + spin_lock_irqsave(&xhci->lock, flags); xhci_halt(xhci); + + /* Power off USB2 ports*/ + for (i = 0; i < xhci->usb2_rhub.num_ports; i++) + xhci_set_port_power(xhci, xhci->main_hcd, i, false, &flags); + + /* Power off USB3 ports*/ + for (i = 0; i < xhci->usb3_rhub.num_ports; i++) + xhci_set_port_power(xhci, xhci->shared_hcd, i, false, &flags); + /* Workaround for spurious wakeups at shutdown with HSW */ if (xhci->quirks & XHCI_SPURIOUS_WAKEUP) xhci_reset(xhci, XHCI_RESET_SHORT_USEC); - spin_unlock_irq(&xhci->lock); + spin_unlock_irqrestore(&xhci->lock, flags);
xhci_cleanup_msix(xhci);
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 0bd76c94a4b1..28aaf031f9a8 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -2196,6 +2196,8 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, int xhci_hub_status_data(struct usb_hcd *hcd, char *buf); int xhci_find_raw_port_number(struct usb_hcd *hcd, int port1); struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd); +void xhci_set_port_power(struct xhci_hcd *xhci, struct usb_hcd *hcd, u16 index, + bool on, unsigned long *flags);
void xhci_hc_died(struct xhci_hcd *xhci);