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| author | Stefan Berger <stefanb@linux.vnet.ibm.com> | 2017-04-18 04:58:26 +0300 |
|---|---|---|
| committer | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2017-04-25 00:27:18 +0300 |
| commit | 8979b02aaf1d6de8d52cc143aa4da961ed32e5a2 (patch) | |
| tree | 2b6485a03914ec7d0a35853486b2ee4d4b07c883 /drivers/char/tpm | |
| parent | e6aef069b6e97790cb127d5eeb86ae9ff0b7b0e3 (diff) | |
| download | linux-8979b02aaf1d6de8d52cc143aa4da961ed32e5a2.tar.xz | |
tpm: Fix reference count to main device
The main device is currently not properly released due to one additional
reference to the 'devs' device which is only released in case of a TPM 2.
So, also get the additional reference only in case of a TPM2.
Fixes: fdc915f7f719 ("tpm: expose spaces via a device link /dev/tpmrm<n>")
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Diffstat (limited to 'drivers/char/tpm')
| -rw-r--r-- | drivers/char/tpm/tpm-chip.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c index a321bd57f3e9..9dec9f551b83 100644 --- a/drivers/char/tpm/tpm-chip.c +++ b/drivers/char/tpm/tpm-chip.c @@ -191,9 +191,10 @@ struct tpm_chip *tpm_chip_alloc(struct device *pdev, /* get extra reference on main device to hold on * behalf of devs. This holds the chip structure * while cdevs is in use. The corresponding put - * is in the tpm_devs_release + * is in the tpm_devs_release (TPM2 only) */ - get_device(&chip->dev); + if (chip->flags & TPM_CHIP_FLAG_TPM2) + get_device(&chip->dev); if (chip->dev_num == 0) chip->dev.devt = MKDEV(MISC_MAJOR, TPM_MINOR); |