diff options
Diffstat (limited to 'drivers/char/tpm')
| -rw-r--r-- | drivers/char/tpm/tpm_i2c_infineon.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c index d83bb8c0217..37d5dcc10ea 100644 --- a/drivers/char/tpm/tpm_i2c_infineon.c +++ b/drivers/char/tpm/tpm_i2c_infineon.c @@ -162,6 +162,10 @@ out: /* take care of 'guard time' */ usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI); + /* __i2c_transfer returns the number of successfully transferred + * messages. + * So rc should be greater than 0 here otherwise we have an error. + */ if (rc <= 0) return -EIO; @@ -208,6 +212,11 @@ static int iic_tpm_write_generic(u8 addr, u8 *buffer, size_t len, i2c_unlock_adapter(tpm_dev.client->adapter); /* take care of 'guard time' */ usleep_range(SLEEP_DURATION_LOW, SLEEP_DURATION_HI); + + /* __i2c_transfer returns the number of successfully transferred + * messages. + * So rc should be greater than 0 here otherwise we have an error. + */ if (rc <= 0) return -EIO; |