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| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2017-04-26 20:50:08 +0900 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2017-06-02 12:44:55 +0300 |
| commit | 067d6fdc558d2c43f0bfdc7af99630dd5eb08dc5 (patch) | |
| tree | d7d608ee2780faa58190410174d28cbeaab0da90 | |
| parent | cdc876877ebc3f0677b267756d4564e2a429e730 (diff) | |
| download | linux-stable-067d6fdc558d2c43f0bfdc7af99630dd5eb08dc5.tar.gz linux-stable-067d6fdc558d2c43f0bfdc7af99630dd5eb08dc5.tar.bz2 linux-stable-067d6fdc558d2c43f0bfdc7af99630dd5eb08dc5.zip | |
usb: gadget: udc: renesas_usb3: fix deadlock by spinlock
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>
| -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 10585da8e360..e27d948617e2 100644 --- a/drivers/usb/gadget/udc/renesas_usb3.c +++ b/drivers/usb/gadget/udc/renesas_usb3.c @@ -1810,14 +1810,11 @@ 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)); |