On Mon, Dec 17, 2018 at 07:22:51PM +0100, Sergio Paracuellos wrote:
> > > +static int ksz_i2c_write(struct ksz_device *dev, u32 reg, u8 *val,
> > > + unsigned int len)
> > > +{
> > > + struct i2c_client *client = dev->priv;
> > > + unsigned int cnt = len;
> > > + int i = 0;
> > > + u8 txb[4];
> > > +
> > > + do {
> > > + txb[i++] = (u8)(*val >> (8 * (cnt - 1)));
> > ^^^^^^^
> >
> > Can "cnt" be zero from ksz_i2c_set()? If so this loop will corrupt
> > memory.
>
> This get and set interface seems to be introduced recently but it is
> not being used yet, so
> in this moment the answer is not. For me, there is no sense in call
> 'set' with no len. Should
> I add a check for zero len and return EINVAL just in case?
>
Yes, please.
> > > +static int ksz_i2c_probe(struct i2c_client *client,
> > > + const struct i2c_device_id *id)
> > > +{
> > > + struct ksz_device *dev;
> > > + int ret;
> > > +
> > > + dev = ksz_switch_alloc(&client->dev, &ksz_i2c_ops, client);
> > > + if (!dev)
> > > + return -ENOMEM;
> > > +
> > > + if (client->dev.platform_data)
> > > + dev->pdata = client->dev.platform_data;
> > > +
> > > + i2c_set_clientdata(client, dev);
> > > +
> > > + ret = ksz9477_switch_register(dev);
> > > + if (ret) {
> > > + dev_err(&client->dev, "registering switch (ret: %d)\n", ret);
> >
> >
> > free dev on this error path?
>
> Internally all of this are using devm_* funcions, so I think is there
> is no need to free anything. Also, the
> spi managed driver for this does nothing also about this.
You're right. My bad. I should have looked at this.
regards,
dan carpenter
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