[PATCH] usb: host: ehci-atmel: stop clocks before releasing HCD
Hongyan Xu <[email protected]>
| Newsgroups | gmane.linux.usb.general,gmane.linux.ports.arm.kernel |
|---|---|
| Message-ID | <[email protected]> |
usb_put_hcd() drops the driver's HCD reference and can free the HCD and its
private data. The remove callback then calls atmel_stop_ehci(), which
obtains that HCD from platform data and dereferences its private data to
disable the clocks.
Stop the controller clocks before dropping the HCD reference so that
atmel_stop_ehci() cannot access an already freed HCD.
Fixes: 501c9c0802d9 ("USB: at91: Add USB EHCI driver for at91sam9g45 series")
Signed-off-by: Hongyan Xu <[email protected]>
---
drivers/usb/host/ehci-atmel.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
index 65747270fd88..bcd56f888ec9 100644
--- a/drivers/usb/host/ehci-atmel.c
+++ b/drivers/usb/host/ehci-atmel.c
@@ -177,9 +177,8 @@ static void ehci_atmel_drv_remove(struct platform_device *pdev)
struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_remove_hcd(hcd);
- usb_put_hcd(hcd);