On Mon, Jul 26, 2021 at 11:00:51PM -0400, Stefan Berger wrote: > > On 7/26/21 10:42 PM, Jarkko Sakkinen wrote: > > On Mon, Jul 12, 2021 at 12:25:05PM -0400, Stefan Berger wrote: > > > From: Stefan Berger <stefanb@xxxxxxxxxxxxx> > > > > > > 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
