Patch "tpm, tpm_tis: Claim locality in interrupt handler" has been added to the 5.15-stable tree

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This is a note to let you know that I've just added the patch titled

    tpm, tpm_tis: Claim locality in interrupt handler

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     tpm-tpm_tis-claim-locality-in-interrupt-handler.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 0e069265bce5a40c4eee52e2364bbbd4dabee94a Mon Sep 17 00:00:00 2001
From: Lino Sanfilippo <l.sanfilippo@xxxxxxxxxx>
Date: Thu, 24 Nov 2022 14:55:35 +0100
Subject: tpm, tpm_tis: Claim locality in interrupt handler
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Lino Sanfilippo <l.sanfilippo@xxxxxxxxxx>

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@xxxxxxxxxx>
Tested-by: Michael Niewöhner <linux@xxxxxxxxxxxxxx>
Tested-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Reviewed-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Signed-off-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 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
@@ -731,7 +731,9 @@ static irqreturn_t tis_int_handler(int d
 		wake_up_interruptible(&priv->int_queue);
 
 	/* Clear interrupts handled with TPM_EOI */
+	tpm_tis_request_locality(chip, 0);
 	rc = tpm_tis_write32(priv, TPM_INT_STATUS(priv->locality), interrupt);
+	tpm_tis_relinquish_locality(chip, 0);
 	if (rc < 0)
 		return IRQ_NONE;
 


Patches currently in stable-queue which might be from l.sanfilippo@xxxxxxxxxx are

queue-5.15/tpm-tpm_tis-claim-locality-in-interrupt-handler.patch



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