diff options
| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2017-04-26 20:50:08 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-24 07:11:15 +0200 |
| commit | dd65c0958b77d97a9419f1ccfab3fa8c30f61338 (patch) | |
| tree | 583918fa6714cc11d3535c62b619362f5944cd42 | |
| parent | 723bd3b9f83fe4ba903351cdaa1e6dfbec8faac0 (diff) | |
usb: gadget: udc: renesas_usb3: fix deadlock by spinlock
commit 067d6fdc558d2c43f0bfdc7af99630dd5eb08dc5 upstream.
This patch fixes an issue that this driver is possible to cause
deadlock by double-spinclocked in renesas_usb3_stop_controller().
So, this patch removes spinlock API calling in renesas_usb3_stop().
(In other words, the previous code had a redundant lock.)
Fixes: 746bfe63bba3 ("usb: gadget: renesas_usb3: add support for Renesas USB3.0 peripheral controller")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/gadget/udc/renesas_usb3.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/usb/gadget/udc/renesas_usb3.c b/drivers/usb/gadget/udc/renesas_usb3.c index 6be61139ce15..82e301e4da89 100644 --- a/drivers/usb/gadget/udc/renesas_usb3.c +++ b/drivers/usb/gadget/udc/renesas_usb3.c @@ -1718,14 +1718,11 @@ static int renesas_usb3_start(struct usb_gadget *gadget, static int renesas_usb3_stop(struct usb_gadget *gadget) { struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget); - unsigned long flags; - spin_lock_irqsave(&usb3->lock, flags); usb3->softconnect = false; usb3->gadget.speed = USB_SPEED_UNKNOWN; usb3->driver = NULL; renesas_usb3_stop_controller(usb3); - spin_unlock_irqrestore(&usb3->lock, flags); pm_runtime_put(usb3_to_dev(usb3)); pm_runtime_disable(usb3_to_dev(usb3)); |