linux-kernel - Re: [PATCH 7/7] misc: intel-ish-client: add intel ishtp clients driver

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Message-ID: <20170104125930.GA8296@kroah.com>
Date:   Wed, 4 Jan 2017 13:59:30 +0100
From:   "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
To:     Jiri Kosina <jikos@...nel.org>
Cc:     "Xu, Even" <even.xu@...el.com>,
        "srinivas.pandruvada@...ux.intel.com" 
        <srinivas.pandruvada@...ux.intel.com>,
        "linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
        "benjamin.tissoires@...hat.com" <benjamin.tissoires@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "arnd@...db.de" <arnd@...db.de>,
        "Shevchenko, Andriy" <andriy.shevchenko@...el.com>
Subject: Re: [PATCH 7/7] misc: intel-ish-client: add intel ishtp clients
 driver

On Wed, Jan 04, 2017 at 10:36:18AM +0100, Jiri Kosina wrote:
> 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?

Let me go review it now, but if it's ok, I have no problem taking it in
my tree, or if you want to take it through yours, that's fine with me,
which ever is easiest for you.

thanks,

greg k-h