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tpm: add module_put wrapper

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For readability, define a tpm_chip_put() wrapper to call module_put().
Replace existing module_put() calls with the wrapper.

(Change based on trusted/encrypted patchset review by David Howells.)

Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: David Safford <safford@watson.ibm.com>
Acked-by: David Howells <dhowells@redhat.com>
Acked-by: Serge E. Hallyn <serge.hallyn@canonical.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Mimi Zohar 2010-11-23 17:50:32 -05:00 committed by James Morris
parent dc88e46029
commit a0e39349d8
2 changed files with 7 additions and 2 deletions
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4
drivers/char/tpm/tpm.c
View File

@ -736,7 +736,7 @@ int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf)
if (chip == NULL)
return -ENODEV;
rc = __tpm_pcr_read(chip, pcr_idx, res_buf);
module_put(chip->dev->driver->owner);
tpm_chip_put(chip);
return rc;
}
EXPORT_SYMBOL_GPL(tpm_pcr_read);
@ -775,7 +775,7 @@ int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash)
rc = transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE,
"attempting extend a PCR value");
module_put(chip->dev->driver->owner);
tpm_chip_put(chip);
return rc;
}
EXPORT_SYMBOL_GPL(tpm_pcr_extend);

5
drivers/char/tpm/tpm.h
View File

@ -113,6 +113,11 @@ struct tpm_chip {
#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
static inline void tpm_chip_put(struct tpm_chip *chip)
{
module_put(chip->dev->driver->owner);
}
static inline int tpm_read_index(int base, int index)
{
outb(index, base);