From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Brian King 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 Signed-off-by: Samuel Mendoza-Jonas Signed-off-by: Joel Stanley --- 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