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authorYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>2017-04-26 20:50:08 +0900
committerFelipe Balbi <felipe.balbi@linux.intel.com>2017-06-02 12:44:55 +0300
commit067d6fdc558d2c43f0bfdc7af99630dd5eb08dc5 (patch)
treed7d608ee2780faa58190410174d28cbeaab0da90 /drivers/usb
parentcdc876877ebc3f0677b267756d4564e2a429e730 (diff)
downloadlinux-067d6fdc558d2c43f0bfdc7af99630dd5eb08dc5.tar.bz2
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>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/gadget/udc/renesas_usb3.c3
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));