diff options
| author |   Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2020-04-12 20:04:12 +0300 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2020-04-21 00:06:13 +0300 |
| commit | b160c94be5d2816b62c8ac338605668304242959 (patch) | |
| tree | 2c84532527b383375ba8f3f274d00a8c35ccd94b /drivers/char | |
| parent | tpm: fix wrong return value in tpm_pcr_extend (diff) | |
| download | wireguard-linux-b160c94be5d2816b62c8ac338605668304242959.tar.xz wireguard-linux-b160c94be5d2816b62c8ac338605668304242959.zip | |
tpm/tpm_tis: Free IRQ if probing fails
Call disable_interrupts() if we have to revert to polling in order not to
unnecessarily reserve the IRQ for the life-cycle of the driver.
Cc: stable@vger.kernel.org # 4.5.x
Reported-by: Hans de Goede <hdegoede@redhat.com>
Fixes: e3837e74a06d ("tpm_tis: Refactor the interrupt setup")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm_tis_core.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c index 27c6ca031e23..2435216bd10a 100644 --- a/drivers/char/tpm/tpm_tis_core.c +++ b/drivers/char/tpm/tpm_tis_core.c @@ -433,6 +433,9 @@ static void disable_interrupts(struct tpm_chip *chip) u32 intmask; int rc; + if (priv->irq == 0) + return; + rc = tpm_tis_read32(priv, TPM_INT_ENABLE(priv->locality), &intmask); if (rc < 0) intmask = 0; @@ -1062,9 +1065,12 @@ int tpm_tis_core_init(struct device *dev, struct tpm_tis_data *priv, int irq, if (irq) { tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED, irq); - if (!(chip->flags & TPM_CHIP_FLAG_IRQ)) + if (!(chip->flags & TPM_CHIP_FLAG_IRQ)) { dev_err(&chip->dev, FW_BUG "TPM interrupt not working, polling instead\n"); + + disable_interrupts(chip); + } } else { tpm_tis_probe_irq(chip, intmask); } |