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tpm/tpm_ftpm_tee: add shutdown call back

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[ Upstream commit 1760eb689ed68c6746744aff2092bff57c78d907 ]

Add shutdown call back to close existing session with fTPM TA
to support kexec scenario.

Add parentheses to function names in comments as specified in kdoc.

Signed-off-by: Thirupathaiah Annapureddy <thiruan@microsoft.com>
Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Tested-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Pavel Tatashin 2019-12-04 10:40:38 -05:00 committed by Greg Kroah-Hartman
parent 2ad182a9d0
commit adbc8231ce
1 changed files with 18 additions and 4 deletions

22
drivers/char/tpm/tpm_ftpm_tee.c

@ -32,7 +32,7 @@ static const uuid_t ftpm_ta_uuid =
0x82, 0xCB, 0x34, 0x3F, 0xB7, 0xF3, 0x78, 0x96);
/**
* ftpm_tee_tpm_op_recv - retrieve fTPM response.
* ftpm_tee_tpm_op_recv() - retrieve fTPM response.
* @chip: the tpm_chip description as specified in driver/char/tpm/tpm.h.
* @buf: the buffer to store data.
* @count: the number of bytes to read.
@ -61,7 +61,7 @@ static int ftpm_tee_tpm_op_recv(struct tpm_chip *chip, u8 *buf, size_t count)
}
/**
* ftpm_tee_tpm_op_send - send TPM commands through the TEE shared memory.
* ftpm_tee_tpm_op_send() - send TPM commands through the TEE shared memory.
* @chip: the tpm_chip description as specified in driver/char/tpm/tpm.h
* @buf: the buffer to send.
* @len: the number of bytes to send.
@ -208,7 +208,7 @@ static int ftpm_tee_match(struct tee_ioctl_version_data *ver, const void *data)
}
/**
* ftpm_tee_probe - initialize the fTPM
* ftpm_tee_probe() - initialize the fTPM
* @pdev: the platform_device description.
*
* Return:
@ -298,7 +298,7 @@ out_tee_session:
}
/**
* ftpm_tee_remove - remove the TPM device
* ftpm_tee_remove() - remove the TPM device
* @pdev: the platform_device description.
*
* Return:
@ -328,6 +328,19 @@ static int ftpm_tee_remove(struct platform_device *pdev)
return 0;
}
/**
* ftpm_tee_shutdown() - shutdown the TPM device
* @pdev: the platform_device description.
*/
static void ftpm_tee_shutdown(struct platform_device *pdev)
{
struct ftpm_tee_private *pvt_data = dev_get_drvdata(&pdev->dev);
tee_shm_free(pvt_data->shm);
tee_client_close_session(pvt_data->ctx, pvt_data->session);
tee_client_close_context(pvt_data->ctx);
}
static const struct of_device_id of_ftpm_tee_ids[] = {
{ .compatible = "microsoft,ftpm" },
{ }
@ -341,6 +354,7 @@ static struct platform_driver ftpm_tee_driver = {
},
.probe = ftpm_tee_probe,
.remove = ftpm_tee_remove,
.shutdown = ftpm_tee_shutdown,
};
module_platform_driver(ftpm_tee_driver);