[PATCH 4.19 23/65] usb: host: xhci-plat: add a shutdown

From: Greg Kroah-Hartman
Date: Tue Mar 24 2020 - 09:12:42 EST


From: Ran Wang <ran.wang_1@xxxxxxx>

commit b433e340e7565110b0ce9ca4b3e26f4b97a1decf upstream.

When loading new kernel via kexec, we need to shutdown host controller to
avoid any un-expected memory accessing during new kernel boot.

Signed-off-by: Ran Wang <ran.wang_1@xxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx>
Tested-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
Reviewed-by: Peter Chen <peter.chen@xxxxxxx>
Link: https://lore.kernel.org/r/20200306092328.41253-1-ran.wang_1@xxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/usb/host/xhci-plat.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -443,6 +443,7 @@ MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_
static struct platform_driver usb_xhci_driver = {
.probe = xhci_plat_probe,
.remove = xhci_plat_remove,
+ .shutdown = usb_hcd_platform_shutdown,
.driver = {
.name = "xhci-hcd",
.pm = &xhci_plat_pm_ops,