[PATCH] i2c: read/write_reg: don't assume client->dev to be valid
Sascha Hauer
s.hauer at pengutronix.de
Wed Jan 24 23:15:13 PST 2018
On Mon, Jan 22, 2018 at 11:59:58AM +0100, Uwe Kleine-König wrote:
> When using the barebox commands i2c_read or i2c_write the client pointer
> passed to the respective function isn't completely initialized. This
> makes
>
> dev_dbg(&client->dev, ...);
>
> choke as it dereferences client->dev.driver->name with
> client->dev.driver being a random value.
>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
> ---
> drivers/i2c/i2c.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
Applied, thanks
Sascha
>
> diff --git a/drivers/i2c/i2c.c b/drivers/i2c/i2c.c
> index fa2c0cd13697..e9e757558561 100644
> --- a/drivers/i2c/i2c.c
> +++ b/drivers/i2c/i2c.c
> @@ -184,7 +184,7 @@ int i2c_read_reg(struct i2c_client *client, u32 addr, u8 *buf, u16 count)
> msg->len = i;
>
> status = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
> - dev_dbg(&client->dev, "%s: %u@%u --> %d\n", __func__,
> + dev_dbg(&client->adapter->dev, "%s: %u@%u --> %d\n", __func__,
> count, addr, status);
>
> if (status == ARRAY_SIZE(msg))
> @@ -217,7 +217,7 @@ int i2c_write_reg(struct i2c_client *client, u32 addr, const u8 *buf, u16 count)
> memcpy(msg->buf + i, buf, count);
>
> status = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
> - dev_dbg(&client->dev, "%s: %u@%u --> %d\n", __func__,
> + dev_dbg(&client->adapter->dev, "%s: %u@%u --> %d\n", __func__,
> count, addr, status);
>
> if (status == ARRAY_SIZE(msg))
> --
> 2.11.0
>
>
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