diff mbox series

[v11,14/14] tpm, tpm_tis: Enable interrupt test

Message ID 20221124135538.31020-15-LinoSanfilippo@gmx.de
State New
Headers
Series TPM IRQ fixes |

Commit Message

Lino Sanfilippo Nov. 24, 2022, 1:55 p.m. UTC 
  From: Lino Sanfilippo <l.sanfilippo@kunbus.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@kunbus.com>
Tested-by: Michael Niewöhner <linux@mniewoehner.de>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
---
 drivers/char/tpm/tpm_tis_core.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
index 94a2bfb244b3..602ca4bb8e2f 100644
--- a/drivers/char/tpm/tpm_tis_core.c
+++ b/drivers/char/tpm/tpm_tis_core.c
@@ -789,10 +789,15 @@  static void tpm_tis_gen_interrupt(struct tpm_chip *chip)
 	cap_t cap;
 	int 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;
 }
 
 /* Register the IRQ and issue a command that will cause an interrupt. If an