diff options
| author | Lino Sanfilippo | 2022-11-24 14:55:26 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-05-11 23:03:06 +0900 |
| commit | 10eea3cfda293aa5280077203eaf52c34f922a94 (patch) | |
| tree | a1387128885c905531a4e5064a214f3624f586f6 /drivers/char | |
| parent | 12839c326ae5cd4d43b337274465bd0ec8634365 (diff) | |
tpm, tpm_tis: Claim locality before writing TPM_INT_ENABLE register
[ 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@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>
Stable-dep-of: 955df4f87760 ("tpm, tpm_tis: Claim locality when interrupts are reenabled on resume")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm_tis_core.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c index 33d98f3e0f7a..a2cbf9b6f4c9 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -1094,7 +1094,11 @@ 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); |