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

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Message-Id: <20200324130759.994494849@linuxfoundation.org>
Date:   Tue, 24 Mar 2020 14:10:44 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ran Wang <ran.wang_1@....com>,
        Stephen Boyd <swboyd@...omium.org>,
        Peter Chen <peter.chen@....com>
Subject: [PATCH 4.19 23/65] usb: host: xhci-plat: add a shutdown

From: Ran Wang <ran.wang_1@....com>

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@....com>
Cc: stable <stable@...r.kernel.org>
Tested-by: Stephen Boyd <swboyd@...omium.org>
Reviewed-by: Peter Chen <peter.chen@....com>
Link: https://lore.kernel.org/r/20200306092328.41253-1-ran.wang_1@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 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,