From: Lino Sanfilippo <l.sanfilippo@xxxxxxxxxx>
[ Upstream commit 282657a8bd7fddcf511b834f43705001668b33a7 ]
In disable_interrupts() the TPM_GLOBAL_INT_ENABLE bit is unset in the
TPM_INT_ENABLE register to shut the interrupts off. However modifying the
register is only possible with a held locality. So claim the locality
before disable_interrupts() is called.
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>
Stable-dep-of: 955df4f87760 ("tpm, tpm_tis: Claim locality when interrupts are reenabled on resume")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/char/tpm/tpm_tis_core.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index ae0c773a6041a..274096fece3fa 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -1076,7 +1076,11 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
dev_err(&chip->dev, FW_BUG
"TPM interrupt not working, polling instead\n");
+ rc = request_locality(chip, 0);
+ if (rc < 0)
+ goto out_err;
disable_interrupts(chip);
+ release_locality(chip, 0);
}
} else {
tpm_tis_probe_irq(chip, intmask);
--
2.39.2
