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| author | Rajiv Andrade <srajiv@linux.vnet.ibm.com> | 2010-11-12 22:30:02 +0100 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2011-01-24 11:22:48 +1100 |
| commit | c4ff4b829ef9e6353c0b133b7adb564a68054979 (patch) | |
| tree | 0b32c7b91763144ea587e2965f5a401eea3d537c /drivers/char | |
| parent | 5403110943a2dcf1f96416d7a412a8b46895facd (diff) | |
| download | linux-c4ff4b829ef9e6353c0b133b7adb564a68054979.tar.gz linux-c4ff4b829ef9e6353c0b133b7adb564a68054979.tar.bz2 linux-c4ff4b829ef9e6353c0b133b7adb564a68054979.zip | |
TPM: Long default timeout fix
If duration variable value is 0 at this point, it's because
chip->vendor.duration wasn't filled by tpm_get_timeouts() yet.
This patch sets then the lowest timeout just to give enough
time for tpm_get_timeouts() to further succeed.
This fix avoids long boot times in case another entity attempts
to send commands to the TPM when the TPM isn't accessible.
Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/tpm/tpm.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c index 1f46f1cd9225..36e0fa161c2b 100644 --- a/drivers/char/tpm/tpm.c +++ b/drivers/char/tpm/tpm.c @@ -364,12 +364,14 @@ unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, tpm_protected_ordinal_duration[ordinal & TPM_PROTECTED_ORDINAL_MASK]; - if (duration_idx != TPM_UNDEFINED) + if (duration_idx != TPM_UNDEFINED) { duration = chip->vendor.duration[duration_idx]; - if (duration <= 0) + /* if duration is 0, it's because chip->vendor.duration wasn't */ + /* filled yet, so we set the lowest timeout just to give enough */ + /* time for tpm_get_timeouts() to succeed */ + return (duration <= 0 ? HZ : duration); + } else return 2 * 60 * HZ; - else - return duration; } EXPORT_SYMBOL_GPL(tpm_calc_ordinal_duration); |