Re: [PATCH 2/2] add irq validity check in tpm_i2c_nuvoton driver

[Jarkko Sakkinen <jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>]

On Wed, Jun 29, 2016 at 12:58:49PM +0300, andrew zamansky wrote:
> if irq==0 (actualy invalid value) then error is printed to dmesg after
> trying to register to 0 interrupt 
> 
> ---
>  drivers/char/tpm/tpm_i2c_nuvoton.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
> index 75a80e466..3081529 100644
> --- a/drivers/char/tpm/tpm_i2c_nuvoton.c
> +++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
> @@ -554,7 +554,9 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
>  	 *   TPM_INTF_INT_LEVEL_LOW | TPM_INTF_DATA_AVAIL_INT
>  	 * The IRQ should be set in the i2c_board_info (which is done
>  	 * automatically in of_i2c_register_devices, for device tree users */
> -	chip->flags |= TPM_CHIP_FLAG_IRQ;
> +	if(chip->flags)
> +		chip->flags |= TPM_CHIP_FLAG_IRQ;
> +
>  	priv->irq = client->irq;
>  
>  	if (chip->flags & TPM_CHIP_FLAG_IRQ) {
> -- 
> 1.9.1
> 

Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>

PS. There's a style error. "if()" should be "if ()". I don't mind fixing
that. Just remember that next time.

/Jarkko

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