On Wed, 4 Jan 2017, Xu, Even wrote:
> > [ ... snip ... ]
> > >
> > > +static ssize_t ishtp_cl_write(struct file *file, const char __user
> > > *ubuf,
> > > + size_t length, loff_t *offset)
> > > +{
> > > + struct ishtp_cl_miscdev *ishtp_cl_misc = file-
> > > >private_data;
> > > + struct ishtp_cl *cl;
> > > + void *write_buf;
> > > + struct ishtp_device *dev;
> > > + int ret;
> > > +
> > > + /* Non-blocking semantics are not supported */
> > > + if (file->f_flags & O_NONBLOCK) {
> > > + ret = -EINVAL;
> > > + goto out_unlock;
> > When taking the error path here you'd try to unlock
> > ishtp_cl_misc->cl_mutex before actually acquiring it.
> >
>
> Thanks for your comments, Jiri, I update my patch below:
Greg, how would you like to handle this (after you're done with reviewing
it of course), given that this driver depends on the preceeding 6 patches
to intel-ish-hid driver?
Thanks,
--
Jiri Kosina
SUSE Labs
