Messages in this thread Patch in this message | | | From | Ricardo Schwarzmeier <> | Subject | [PATCH v2] tpm: Return the actual size when receiving an unsupported command | Date | Wed, 20 Jun 2018 11:55:07 +0200 |
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The command size is computed for the header anyway. It can as well indicate the correct number of bytes to read from the driver. Fixes: 095531f891e6 ("tpm: return a TPM_RC_COMMAND_CODE response if command is not implemented")
Signed-off-by: Ricardo Schwarzmeier <Ricardo.Schwarzmeier@infineon.com> --- drivers/char/tpm/tpm-interface.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index e32f6e85dc6d..0923e81505a5 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -423,7 +423,7 @@ static ssize_t tpm_try_transmit(struct tpm_chip *chip, header->tag = cpu_to_be16(TPM2_ST_NO_SESSIONS); header->return_code = cpu_to_be32(TPM2_RC_COMMAND_CODE | TSS2_RESMGR_TPM_RC_LAYER); - return bufsiz; + return header->length; } if (bufsiz > TPM_BUFSIZE) -- 2.17.1
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