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tpm, tpm_tis: Claim locality in interrupt handler

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commit 0e069265bce5a40c4eee52e2364bbbd4dabee94a upstream.

Writing the TPM_INT_STATUS register in the interrupt handler to clear the
interrupts only has effect if a locality is held. Since this is not
guaranteed at the time the interrupt is fired, claim the locality
explicitly in the handler.

Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Tested-by: Michael Niewöhner <linux@mniewoehner.de>
Tested-by: Jarkko Sakkinen <jarkko@kernel.org>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lino Sanfilippo 2022-11-24 14:55:35 +01:00 committed by Greg Kroah-Hartman
parent 2e7ad879e1
commit a46fa56966
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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@ -772,7 +772,9 @@ static irqreturn_t tis_int_handler(int dummy, void *dev_id)
wake_up_interruptible(&priv->int_queue); wake_up_interruptible(&priv->int_queue);
/* Clear interrupts handled with TPM_EOI */ /* Clear interrupts handled with TPM_EOI */
tpm_tis_request_locality(chip, 0);
rc = tpm_tis_write32(priv, TPM_INT_STATUS(priv->locality), interrupt); rc = tpm_tis_write32(priv, TPM_INT_STATUS(priv->locality), interrupt);
tpm_tis_relinquish_locality(chip, 0);
if (rc < 0) if (rc < 0)
return IRQ_NONE; return IRQ_NONE;