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Message-Id: <20220621132447.16281-10-LinoSanfilippo@gmx.de>
Date: Tue, 21 Jun 2022 15:24:47 +0200
From: Lino Sanfilippo <LinoSanfilippo@....de>
To: peterhuewe@....de, jarkko@...nel.org, jgg@...pe.ca
Cc: stefanb@...ux.vnet.ibm.com, linux@...ewoehner.de,
linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
l.sanfilippo@...bus.com, LinoSanfilippo@....de, lukas@...ner.de,
p.rosenberger@...bus.com
Subject: [PATCH v6 9/9] tpm, tpm_tis: Enable interrupt test
From: Lino Sanfilippo <l.sanfilippo@...bus.com>
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@...bus.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
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