Re: [PATCH v2] tpm_tis: reserve chip for duration of tpm_tis_core_init

From: Dan Williams
Date: Wed Dec 11 2019 - 21:16:04 EST

On Wed, Dec 11, 2019 at 3:56 PM Jerry Snitselaar <jsnitsel@xxxxxxxxxx> wrote:
> Instead of repeatedly calling tpm_chip_start/tpm_chip_stop when
> issuing commands to the tpm during initialization, just reserve the
> chip after wait_startup, and release it when we are ready to call
> tpm_chip_register.
> Cc: Christian Bundy <christianbundy@xxxxxxxxxxx>
> Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
> Cc: Peter Huewe <peterhuewe@xxxxxx>
> Cc: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
> Cc: Jason Gunthorpe <jgg@xxxxxxxx>
> Cc: Stefan Berger <stefanb@xxxxxxxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Cc: linux-integrity@xxxxxxxxxxxxxxx
> Fixes: a3fbfae82b4c ("tpm: take TPM chip power gating out of tpm_transmit()")
> Fixes: 5b359c7c4372 ("tpm_tis_core: Turn on the TPM before probing IRQ's")

Ugh, sorry, I guess this jinxed it. This patch does not address the
IRQ storm on the platform I reported earlier.