tpm, tpm_tis: Claim locality before writing TPM_INT_ENABLE register

JIRA: https://issues.redhat.com/browse/RHEL-72765

Upstream Status: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

commit 282657a
Author: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Date:   Thu Nov 24 14:55:26 2022 +0100

    tpm, tpm_tis: Claim locality before writing TPM_INT_ENABLE register

    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@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: Štěpán Horáček <shoracek@redhat.com>

Author: shoracek

drivers/char/tpm/tpm_tis_core.c

@@ -1089,7 +1089,11 @@ 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);