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tpm: check for TPM_CHIP_FLAG_TPM2 before calling tpm2_shutdown()

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Fixes: 20e0152393b41 ("tpm: fix crash in tpm_tis deinitialization")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reported-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Tested-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
This commit is contained in:
Jarkko Sakkinen 2016-04-25 12:20:07 +03:00
parent 422eac3f7d
commit c0dff1f451
1 changed files with 2 additions and 1 deletions
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drivers/char/tpm/tpm-chip.c
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@ -269,6 +269,7 @@ static void tpm_del_char_device(struct tpm_chip *chip)
/* Make the driver uncallable. */
down_write(&chip->ops_sem);
if (chip->flags & TPM_CHIP_FLAG_TPM2)
tpm2_shutdown(chip, TPM2_SU_CLEAR);
chip->ops = NULL;
up_write(&chip->ops_sem);