[PATCH] tpm: ibmvtpm: fix error return code in tpm_ibmvtpm_probe()

[Jarkko Sakkinen]

On Tue, 2020-11-24 at 21:52 +0800, Wang Hai wrote:
> Fix to return a negative error code from the error handling
> case instead of 0, as done elsewhere in this function.
> 
> Fixes: d8d74ea3c002 ("tpm: ibmvtpm: Wait for buffer to be set before
> proceeding")
> Reported-by: Hulk Robot <hulkci at huawei.com>
> Signed-off-by: Wang Hai <wanghai38 at huawei.com>

Provide a reasoning for -ETIMEOUT in the commit message.

/Jarkko

> ---
>  drivers/char/tpm/tpm_ibmvtpm.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/char/tpm/tpm_ibmvtpm.c
> b/drivers/char/tpm/tpm_ibmvtpm.c
> index 994385bf37c0..813eb2cac0ce 100644
> --- a/drivers/char/tpm/tpm_ibmvtpm.c
> +++ b/drivers/char/tpm/tpm_ibmvtpm.c
> @@ -687,6 +687,7 @@ static int tpm_ibmvtpm_probe(struct vio_dev
> *vio_dev,
>                                 ibmvtpm->rtce_buf != NULL,
>                                 HZ)) {
>                 dev_err(dev, "CRQ response timed out\n");
> +               rc = -ETIMEDOUT;
>                 goto init_irq_cleanup;
>         }
>