[PATCH] tpm: ibmvtpm: Avoid error message when process gets signal while waiting

[Jarkko Sakkinen]

On Mon, Jul 12, 2021 at 12:25:05PM -0400, Stefan Berger wrote:
> From: Stefan Berger <stefanb at linux.ibm.com>
> 
> When rngd is run as root then lots of these types of message will appear
> in the kernel log if the TPM has been configure to provide random bytes:
> 
> [ 7406.275163] tpm tpm0: tpm_transmit: tpm_recv: error -4
> 
> The issue is caused by the following call that is interrupted while
> waiting for the TPM's response.
> 
> sig = wait_event_interruptible(ibmvtpm->wq,
>                                !ibmvtpm->tpm_processing_cmd);
> 
> The solution is to use wait_event() instead.

Why?

/Jarkko