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

Andy Shevchenko
2021-07-19T11:48:33Z

On Mon, Jul 19, 2021 at 11:02:07AM +0200, Andrea Merello wrote:
> 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

kmemdup_nul() then.

--
With Best Regards,
Andy Shevchenko