diff options
| author | Nicolas Saenz Julienne <nicolassaenzj@gmeil.com> | 2016-08-16 10:22:38 +0100 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-08-22 10:45:13 +0300 |
| commit | d6011f6fc21b4d4ab1586f01c4f62becaa0a28d7 (patch) | |
| tree | 26cd4cb81813fa12e4d55f39e9e9e3b49268827b | |
| parent | f4693b08cc901912a87369c46537b94ed4084ea0 (diff) | |
usb: dwc3: gadget: don't rely on jiffies while holding spinlock
__dwc3_gadget_wakeup() is called while holding a spinlock, then depends on
jiffies in order to timeout while polling the USB core for a link state
update. In the case the wakeup failed, the timeout will never happen and
will also cause the cpu to stall until rcu_preempt kicks in.
This switches to a "decrement variable and wait" timeout scheme.
Signed-off-by: Nicolas Saenz Julienne <nicolassaenzj@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>