diff options
| author | Michal Nazarewicz <mina86@mina86.com> | 2016-10-04 03:07:33 +0300 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-10-17 12:34:08 +0300 |
| commit | 454915dde06a51133750c6745f0ba57361ba209d (patch) | |
| tree | 51ef3f134d46a427d088b9c3d2a89c39944cff17 /drivers/usb | |
| parent | a07ce8d34eb3d9c6cec3aa25f7713e6aafad2260 (diff) | |
| download | linux-454915dde06a51133750c6745f0ba57361ba209d.tar.xz | |
usb: gadget: f_fs: edit epfile->ep under lock
epfile->ep is protected by ffs->eps_lock (not epfile->mutex) so clear it
while holding the spin lock.
Tested-by: John Stultz <john.stultz@linaro.org>
Tested-by: Chen Yu <chenyu56@huawei.com>
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/gadget/function/f_fs.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c index 54ad100af35b..b31aa9572723 100644 --- a/drivers/usb/gadget/function/f_fs.c +++ b/drivers/usb/gadget/function/f_fs.c @@ -1725,17 +1725,17 @@ static void ffs_func_eps_disable(struct ffs_function *func) unsigned long flags; do { - if (epfile) - mutex_lock(&epfile->mutex); spin_lock_irqsave(&func->ffs->eps_lock, flags); /* pending requests get nuked */ if (likely(ep->ep)) usb_ep_disable(ep->ep); ++ep; + if (epfile) + epfile->ep = NULL; spin_unlock_irqrestore(&func->ffs->eps_lock, flags); if (epfile) { - epfile->ep = NULL; + mutex_lock(&epfile->mutex); kfree(epfile->read_buffer); epfile->read_buffer = NULL; mutex_unlock(&epfile->mutex); |