[PATCH v6 9/9] tpm, tpm_tis: Enable interrupt test

Lino Sanfilippo
2022-06-21T13:34:45Z

The test for interrupts in tpm_tis_send() is skipped if the flag
TPM_CHIP_FLAG_IRQ is not set. Since the current code never sets the flag
initially the test is never executed.

Fix this by setting the flag in tpm_tis_gen_interrupt() right after
interrupts have been enabled and before the test is executed.

Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
---
drivers/char/tpm/tpm_tis_core.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index 1f7663ac1fc4..650c202d2f50 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -775,11 +775,16 @@ static int tpm_tis_gen_interrupt(struct tpm_chip *chip)
if (ret < 0)
return ret;

+ chip->flags |= TPM_CHIP_FLAG_IRQ;
+
if (chip->flags & TPM_CHIP_FLAG_TPM2)
ret = tpm2_get_tpm_pt(chip, 0x100, &cap2, desc);
else
ret = tpm1_getcap(chip, TPM_CAP_PROP_TIS_TIMEOUT, &cap, desc, 0);

+ if (ret)
+ chip->flags &= ~TPM_CHIP_FLAG_IRQ;
+
tpm_tis_release_locality(chip, 0);

return ret;
--
2.36.1