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| author | Myeonghun Pak <mhun512@gmail.com> | 2026-06-26 19:35:52 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-09-07 17:18:24 +0200 |
| commit | 73e89faee1f9b9119fa70b679058b045168ae633 (patch) | |
| tree | a53d0c6a732798fd34b44c287d6216a732b36222 | |
| parent | ad812805fea7108d9f8efc240e4810b513b46754 (diff) | |
| download | linux-stable-73e89faee1f9b9119fa70b679058b045168ae633.tar.gz linux-stable-73e89faee1f9b9119fa70b679058b045168ae633.zip | |
tpm: tpm_i2c_nuvoton: disable IRQ on wait timeout
commit 705c4ed0643366963547b2616d53165f2519c81f upstream.
i2c_nuvoton_wait_for_stat() enables the IRQ before waiting for the
interrupt handler to report a status change. If the wait times out, or is
interrupted before the handler runs, the function returns without
balancing the enable_irq() call.
Disable the IRQ before leaving the failed wait path. Also preserve an
interrupted wait's original error code instead of converting it to
-ETIMEDOUT inside the helper.
Cc: stable@vger.kernel.org # v5.10+
Fixes: 4c336e4b1556 ("tpm: Add support for the Nuvoton NPCT501 I2C TPM")
Co-developed-by: Ijae Kim <ae878000@gmail.com>
Signed-off-by: Ijae Kim <ae878000@gmail.com>
Signed-off-by: Myeonghun Pak <mhun512@gmail.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Link: https://lore.kernel.org/r/20260626091653.54929-1-mhun512@gmail.com
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/char/tpm/tpm_i2c_nuvoton.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c index 3c3ee5f551db..1b8d349d9f35 100644 --- a/drivers/char/tpm/tpm_i2c_nuvoton.c +++ b/drivers/char/tpm/tpm_i2c_nuvoton.c @@ -182,8 +182,10 @@ static int i2c_nuvoton_wait_for_stat(struct tpm_chip *chip, u8 mask, u8 value, timeout); if (rc > 0) return 0; - /* At this point we know that the SINT pin is asserted, so we - * do not need to do i2c_nuvoton_check_status */ + + disable_irq(priv->irq); + if (rc < 0) + return rc; } else { unsigned long ten_msec, stop; bool status_valid; |