| Samuel Mendoza-Jonas | 69b3de0 | 2017-10-25 13:20:17 +1100 | [diff] [blame] | 1 | From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 |
| 2 | From: Brian King <brking@linux.vnet.ibm.com> |
| 3 | Date: Wed, 25 Oct 2017 10:42:59 +1100 |
| 4 | Subject: [PATCH 1/5] xhci: Reset controller on xhci shutdown |
| 5 | |
| 6 | Fixes kexec boot. Without a hard reset, some USB chips will fail to |
| 7 | initialize in a kexec booted kernel. |
| 8 | |
| 9 | Signed-off-by: Brian King <brking@linux.vnet.ibm.com> |
| 10 | Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com> |
| 11 | --- |
| 12 | drivers/usb/host/xhci.c | 1 + |
| 13 | 1 file changed, 1 insertion(+) |
| 14 | |
| 15 | diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c |
| 16 | index ee198ea47f49..0e362e5c8b49 100644 |
| 17 | --- a/drivers/usb/host/xhci.c |
| 18 | +++ b/drivers/usb/host/xhci.c |
| 19 | @@ -729,6 +729,7 @@ static void xhci_shutdown(struct usb_hcd *hcd) |
| 20 | /* Yet another workaround for spurious wakeups at shutdown with HSW */ |
| 21 | if (xhci->quirks & XHCI_SPURIOUS_WAKEUP) |
| 22 | pci_set_power_state(to_pci_dev(hcd->self.sysdev), PCI_D3hot); |
| 23 | + pci_reset_function_locked(to_pci_dev(hcd->self.sysdev)); |
| 24 | } |
| 25 | |
| 26 | #ifdef CONFIG_PM |