Re: [PATCH 2/4] iio: imu: add Bosch Sensortec BNO055 core driver

From: Andrea Merello <andrea.merello@gmail.com>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Jonathan Cameron <jic23@kernel.org>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Rob Herring <robh+dt@kernel.org>,
	Matt Ranostay <matt.ranostay@konsulko.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	vlad.dogaru@intel.com,
	linux-kernel <linux-kernel@vger.kernel.org>,
	linux-iio <linux-iio@vger.kernel.org>,
	Andrea Merello <andrea.merello@iit.it>
Subject: Re: [PATCH 2/4] iio: imu: add Bosch Sensortec BNO055 core driver
Date: Mon, 19 Jul 2021 11:02:07 +0200	[thread overview]
Message-ID: <CAN8YU5MFMqh3wZo-yOOE8och3x089kYWjtrr83Jt8wCQTKFE8Q@mail.gmail.com> (raw)
In-Reply-To: <CAHp75Vf_Og2wjRy2j0gC37DgR0x9B_F5iSUj8VOtWkhWjgiOag@mail.gmail.com>

Il giorno gio 15 lug 2021 alle ore 18:50 Andy Shevchenko
<andy.shevchenko@gmail.com> ha scritto:

>
> > +/* must be called in configuration mode */
> > +int bno055_calibration_load(struct bno055_priv *priv, const struct firmware *fw)
> > +{
> > +       int i;
> > +       unsigned int tmp;
> > +       u8 cal[BNO055_CALDATA_LEN];
> > +       int read, tot_read = 0;
> > +       int ret = 0;
> > +       char *buf = kmalloc(fw->size + 1, GFP_KERNEL);
> > +
> > +       if (!buf)
> > +               return -ENOMEM;
> > +
> > +       memcpy(buf, fw->data, fw->size);
>
> kmemdup() ?
>

As a second thought: no, the whole point of reallocating and copying
here, is that we want to allocate an extra byte; kmemdup() will
allocate and copy only the very same amount of memory