From: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Date: Thu, 24 Nov 2022 14:55:36 +0100
Subject: [PATCH] tpm, tpm_tis: Claim locality when interrupts are reenabled on
resume
References: bsc#1012628
Patch-mainline: 6.3.2
Git-commit: 955df4f87760b3bb2af253d3fbb12fb712b3ffa6
[ 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@kunbus.com>
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: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
drivers/char/tpm/tpm_tis_core.c | 19 +++++++++----------
1 file changed, 9 insertions(+), 10 deletions(-)
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index c5fef63c..eecfbd7e 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -1191,28 +1191,27 @@ 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
--
2.35.3