| From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 |
| From: Brian King <brking@linux.vnet.ibm.com> |
| Date: Wed, 25 Oct 2017 10:42:59 +1100 |
| Subject: [PATCH 1/2] xhci: Reset controller on xhci shutdown |
| |
| Fixes kexec boot. Without a hard reset, some USB chips will fail to |
| initialize in a kexec booted kernel. |
| |
| Signed-off-by: Brian King <brking@linux.vnet.ibm.com> |
| Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> |
| Signed-off-by: Joel Stanley <joel@jms.id.au> |
| --- |
| drivers/usb/host/xhci.c | 1 + |
| 1 file changed, 1 insertion(+) |
| |
| diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c |
| index dae3be1b9c8f..bd675c5db608 100644 |
| --- a/drivers/usb/host/xhci.c |
| +++ b/drivers/usb/host/xhci.c |
| @@ -794,6 +794,7 @@ static void xhci_shutdown(struct usb_hcd *hcd) |
| /* Yet another workaround for spurious wakeups at shutdown with HSW */ |
| if (xhci->quirks & XHCI_SPURIOUS_WAKEUP) |
| pci_set_power_state(to_pci_dev(hcd->self.sysdev), PCI_D3hot); |
| + pci_reset_function_locked(to_pci_dev(hcd->self.sysdev)); |
| } |
| |
| #ifdef CONFIG_PM |