Patch "tpm, tpm_tis: Claim locality when interrupts are reenabled on resume" has been added to the 5.10-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 when interrupts are reenabled on resume

to the 5.10-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-when-interrupts-are-reena.patch
and it can be found in the queue-5.10 subdirectory.

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



commit 8f4824e56e50f1030d7678d5738cbabff72c8cd4
Author: Lino Sanfilippo <l.sanfilippo@xxxxxxxxxx>
Date:   Thu Nov 24 14:55:36 2022 +0100

    tpm, tpm_tis: Claim locality when interrupts are reenabled on resume
    
    [ Upstream commit 955df4f87760b3bb2af253d3fbb12fb712b3ffa6 ]
    
    In tpm_tis_resume() make sure that the locality has been claimed when
    tpm_tis_reenable_interrupts() is called. Otherwise the writings to the
    register might not have any effect.
    
    Fixes: 45baa1d1fa39 ("tpm_tis: Re-enable interrupts upon (S3) resume")
    Signed-off-by: Lino Sanfilippo <l.sanfilippo@xxxxxxxxxx>
    Tested-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
    Reviewed-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
    Signed-off-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index 3ea0fff30273e..d65fff4e2ebe9 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -1173,28 +1173,27 @@ int tpm_tis_resume(struct device *dev)
 	struct tpm_chip *chip = dev_get_drvdata(dev);
 	int ret;
 
+	ret = tpm_tis_request_locality(chip, 0);
+	if (ret < 0)
+		return ret;
+
 	if (chip->flags & TPM_CHIP_FLAG_IRQ)
 		tpm_tis_reenable_interrupts(chip);
 
 	ret = tpm_pm_resume(dev);
 	if (ret)
-		return ret;
+		goto out;
 
 	/*
 	 * TPM 1.2 requires self-test on resume. This function actually returns
 	 * an error code but for unknown reason it isn't handled.
 	 */
-	if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
-		ret = tpm_tis_request_locality(chip, 0);
-		if (ret < 0)
-			return ret;
-
+	if (!(chip->flags & TPM_CHIP_FLAG_TPM2))
 		tpm1_do_selftest(chip);
+out:
+	tpm_tis_relinquish_locality(chip, 0);
 
-		tpm_tis_relinquish_locality(chip, 0);
-	}
-
-	return 0;
+	return ret;
 }
 EXPORT_SYMBOL_GPL(tpm_tis_resume);
 #endif



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