On Thu 25 Feb 12:27 CST 2021, Thara Gopinath wrote:
> MAC_FAILED gets set in the status register if authenthication fails
> for ccm algorithms(during decryption). Add support to catch and flag
> this error.
>
> Signed-off-by: Thara Gopinath <thara.gopin...@linaro.org>
> ---
> drivers/crypto/qce/common.c | 11 ++++++++---
> 1 file changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/crypto/qce/common.c b/drivers/crypto/qce/common.c
> index dceb9579d87a..7c3cb483749e 100644
> --- a/drivers/crypto/qce/common.c
> +++ b/drivers/crypto/qce/common.c
> @@ -403,7 +403,8 @@ int qce_start(struct crypto_async_request *async_req, u32
> type)
> }
>
> #define STATUS_ERRORS \
> - (BIT(SW_ERR_SHIFT) | BIT(AXI_ERR_SHIFT) | BIT(HSD_ERR_SHIFT))
> + (BIT(SW_ERR_SHIFT) | BIT(AXI_ERR_SHIFT) | \
> + BIT(HSD_ERR_SHIFT) | BIT(MAC_FAILED_SHIFT))
>
> int qce_check_status(struct qce_device *qce, u32 *status)
> {
> @@ -417,8 +418,12 @@ int qce_check_status(struct qce_device *qce, u32 *status)
> * use result_status from result dump the result_status needs to be byte
> * swapped, since we set the device to little endian.
> */
> - if (*status & STATUS_ERRORS || !(*status & BIT(OPERATION_DONE_SHIFT)))
> - ret = -ENXIO;
> + if (*status & STATUS_ERRORS || !(*status & BIT(OPERATION_DONE_SHIFT))) {
> + if (*status & BIT(MAC_FAILED_SHIFT))
Afaict MAC_FAILED indicates a different category of errors from the
others. So I would prefer that the conditionals are flattened.
Is OPERATION_DONE set when MAC_FAILED?
If so:
if (errors || !done)
return -ENXIO;
else if (*status & BIT(MAC_FAILED))
return -EBADMSG;
Would be cleaner in my opinion.
Regards,
Bjorn
> + ret = -EBADMSG;
> + else
> + ret = -ENXIO;
> + }
>
> return ret;
> }
> --
> 2.25.1
>
