Re: [PATCH] tpm: ibmvtpm: Avoid error message when process gets signal while waiting
From: Jarkko Sakkinen <jarkko@kernel.org>
Date: 2021-07-28 21:50:38
Also in:
linux-security-module, lkml
On Mon, Jul 26, 2021 at 11:00:51PM -0400, Stefan Berger wrote:
On 7/26/21 10:42 PM, Jarkko Sakkinen wrote:quoted
On Mon, Jul 12, 2021 at 12:25:05PM -0400, Stefan Berger wrote:quoted
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?So it becomes uninterruptible and these error messages go away.
We do not want to make a process uninterruptible. That would prevent killing it. /Jarkko