On Thu, Nov 12, 2015 at 08:26:03AM +0100, LABBE Corentin wrote:
> of_match_device could return NULL, and so cause a NULL pointer
No. There is no way that of_match_device() can ever fail. The driver
core uses the same table to match the OF device to the driver, so the
only case where of_match_device() would return NULL is if no match was
found, in which case the tegra_i2c_probe() function would never have
been called in the first place.
Thierry
> dereference later at line 809:
> i2c_dev->hw = match->data;
>
> Signed-off-by: LABBE Corentin <clabbe.montjoie@xxxxxxxxx>
> ---
> drivers/i2c/busses/i2c-tegra.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
> index a0522fc..c803551 100644
> --- a/drivers/i2c/busses/i2c-tegra.c
> +++ b/drivers/i2c/busses/i2c-tegra.c
> @@ -806,7 +806,10 @@ static int tegra_i2c_probe(struct platform_device *pdev)
>
> if (pdev->dev.of_node) {
> const struct of_device_id *match;
> +
> match = of_match_device(tegra_i2c_of_match, &pdev->dev);
> + if (!match)
> + return -ENODEV;
> i2c_dev->hw = match->data;
> i2c_dev->is_dvc = of_device_is_compatible(pdev->dev.of_node,
> "nvidia,tegra20-i2c-dvc");
> --
> 2.4.10
>
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