[PATCH v6 3/9] tpm, tpm_tis: Disable interrupts if tpm_tis_probe_irq() failed

Lino Sanfilippo
2022-06-21T13:35:28Z

Both functions tpm_tis_probe_irq_single() and tpm_tis_probe_irq() may setup
the interrupts and then return with an error. This case is indicated by a
missing TPM_CHIP_FLAG_IRQ flag in chip->flags.
Currently the interrupt setup is only undone if tpm_tis_probe_irq_single()
fails. Undo the setup also if tpm_tis_probe_irq() fails.

Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
---
drivers/char/tpm/tpm_tis_core.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index 0e68e4502a56..d32e93c86f48 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -1077,21 +1077,21 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq,
goto out_err;
}

- if (irq) {
+ if (irq)
tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED,
irq);
- if (!(chip->flags & TPM_CHIP_FLAG_IRQ)) {
- dev_err(&chip->dev, FW_BUG
+ else
+ tpm_tis_probe_irq(chip, intmask);
+
+ if (!(chip->flags & TPM_CHIP_FLAG_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);
+ rc = request_locality(chip, 0);
+ if (rc < 0)
+ goto out_err;
+ disable_interrupts(chip);
+ release_locality(chip, 0);
}
}

--
2.36.1