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tpm_tis_core: Turn on the TPM before probing IRQ's

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The interrupt probing sequence in tpm_tis_core cannot obviously run with
the TPM power gated. Power on the TPM with tpm_chip_start() before
probing IRQ's. Turn it off once the probing is complete.

Cc: linux-stable@vger.kernel.org
Fixes: a3fbfae82b ("tpm: take TPM chip power gating out of tpm_transmit()")
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
This commit is contained in:
Stefan Berger 2019-08-20 08:25:17 -04:00 committed by Jarkko Sakkinen
parent 14591e2351
commit 5b359c7c43
1 changed files with 2 additions and 0 deletions
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2
drivers/char/tpm/tpm_tis_core.c
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@ -980,6 +980,7 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
goto out_err; goto out_err;
} }
tpm_chip_start(chip);
if (irq) { if (irq) {
tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED, tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED,
irq); irq);
@ -989,6 +990,7 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
} else { } else {
tpm_tis_probe_irq(chip, intmask); tpm_tis_probe_irq(chip, intmask);
} }
tpm_chip_stop(chip);
} }
rc = tpm_chip_register(chip); rc = tpm_chip_register(chip);