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authorJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>2017-11-05 14:16:26 +0300
committerJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>2018-01-08 13:58:36 +0300
commitaad887f6641145fec2a801da2ce4ed36cf99c6a5 (patch)
tree80d2e496024240dbe3ee26cb43b955696a312013 /drivers/char/hw_random
parent58cc1e4faf10a73c4302825ffd37a47d410fc1b5 (diff)
downloadlinux-aad887f6641145fec2a801da2ce4ed36cf99c6a5.tar.xz
tpm: use struct tpm_chip for tpm_chip_find_get()
Device number (the character device index) is not a stable identifier for a TPM chip. That is the reason why every call site passes TPM_ANY_NUM to tpm_chip_find_get(). This commit changes the API in a way that instead a struct tpm_chip instance is given and NULL means the default chip. In addition, this commit refines the documentation to be up to date with the implementation. Suggested-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com> (@chip_num -> @chip part) Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Reviewed-by: Jason Gunthorpe <jgg@ziepe.ca> Tested-by: PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>
Diffstat (limited to 'drivers/char/hw_random')
-rw-r--r--drivers/char/hw_random/tpm-rng.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/hw_random/tpm-rng.c b/drivers/char/hw_random/tpm-rng.c
index d6d448266f07..c5e363825af0 100644
--- a/drivers/char/hw_random/tpm-rng.c
+++ b/drivers/char/hw_random/tpm-rng.c
@@ -25,7 +25,7 @@
static int tpm_rng_read(struct hwrng *rng, void *data, size_t max, bool wait)
{
- return tpm_get_random(TPM_ANY_NUM, data, max);
+ return tpm_get_random(NULL, data, max);
}
static struct hwrng tpm_rng = {