Re: [PATCH] tpm: ibmvtpm: Avoid error message when process gets signal while waiting
From: Jarkko Sakkinen <jarkko@kernel.org>
Date: 2021-07-27 02:42:30
Also in:
linux-security-module, lkml
On Mon, Jul 12, 2021 at 12:25:05PM -0400, Stefan Berger wrote:
From: Stefan Berger <stefanb@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