2020-03-06 09:27:29

by Ran Wang

Subject: [PATCH] usb: host: xhci-plat: add a shutdown

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 <[email protected]>
Reviewed-by: Peter Chen <[email protected]>
---
drivers/usb/host/xhci-plat.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index d90cd5e..315b455 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -445,6 +445,7 @@ MODULE_DEVICE_TABLE(acpi, usb_xhci_acpi_match);
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,
--
2.7.4

2020-03-09 06:31:30

by Stephen Boyd

Subject: Re: [PATCH] usb: host: xhci-plat: add a shutdown

Quoting Ran Wang (2020-03-06 01:23:28)
> 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 <[email protected]>
> Reviewed-by: Peter Chen <[email protected]>
> ---

Tested-by: Stephen Boyd <[email protected]>

This fixes a problem I see where USB is still active during an orderly
reboot.