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Message-Id: <20191003154555.839747700@linuxfoundation.org>
Date: Thu, 3 Oct 2019 17:53:30 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, linux-stable@...r.kernel.org,
Stefan Berger <stefanb@...ux.ibm.com>,
Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Subject: [PATCH 5.2 232/313] tpm_tis_core: Turn on the TPM before probing IRQs
From: Stefan Berger <stefanb@...ux.ibm.com>
commit 5b359c7c43727e624eac3efc7ad21bd2defea161 upstream.
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@...r.kernel.org
Fixes: a3fbfae82b4c ("tpm: take TPM chip power gating out of tpm_transmit()")
Signed-off-by: Stefan Berger <stefanb@...ux.ibm.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/char/tpm/tpm_tis_core.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -980,6 +980,7 @@ int tpm_tis_core_init(struct device *dev
goto out_err;
}
+ tpm_chip_start(chip);
if (irq) {
tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED,
irq);
@@ -989,6 +990,7 @@ int tpm_tis_core_init(struct device *dev
} else {
tpm_tis_probe_irq(chip, intmask);
}
+ tpm_chip_stop(chip);
}
rc = tpm_chip_register(chip);
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