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SubjectRe: [PATCH v7 06/10] tpm, tpm_tis: Move interrupt mask checks into own function
On Thu, Jun 30, 2022 at 01:26:49AM +0200, Lino Sanfilippo wrote:
> From: Lino Sanfilippo <l.sanfilippo@kunbus.com>
>
> Clean up wait_for_tpm_stat() by moving multiple similar interrupt mask
> checks into an own function.
>
> Signed-off-by: Lino Sanfilippo <l.sanfilippo@kunbus.com>
> Suggested-by: Jarkko Sakkinen <jarkko@kernel.org>
> ---
> drivers/char/tpm/tpm_tis_core.c | 29 ++++++++++++++++++-----------
> 1 file changed, 18 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/char/tpm/tpm_tis_core.c b/drivers/char/tpm/tpm_tis_core.c
> index c13599e94ab6..bd4eeb0b2192 100644
> --- a/drivers/char/tpm/tpm_tis_core.c
> +++ b/drivers/char/tpm/tpm_tis_core.c
> @@ -44,6 +44,20 @@ static bool wait_for_tpm_stat_cond(struct tpm_chip *chip, u8 mask,
> return false;
> }
>
> +static u8 tpm_tis_filter_sts_mask(u8 int_mask, u8 sts_mask)
> +{
> + if (!(int_mask & TPM_INTF_STS_VALID_INT))
> + sts_mask &= ~TPM_STS_VALID;
> +
> + if (!(int_mask & TPM_INTF_DATA_AVAIL_INT))
> + sts_mask &= ~TPM_STS_DATA_AVAIL;
> +
> + if (!(int_mask & TPM_INTF_CMD_READY_INT))
> + sts_mask &= ~TPM_STS_COMMAND_READY;
> +
> + return sts_mask;
> +}
> +
> static int wait_for_tpm_stat(struct tpm_chip *chip, u8 mask,
> unsigned long timeout, wait_queue_head_t *queue,
> bool check_cancel)
> @@ -53,7 +67,7 @@ static int wait_for_tpm_stat(struct tpm_chip *chip, u8 mask,
> long rc;
> u8 status;
> bool canceled = false;
> - u8 sts_mask = 0;
> + u8 sts_mask;
> int ret = 0;
>
> /* check current status */
> @@ -61,17 +75,10 @@ static int wait_for_tpm_stat(struct tpm_chip *chip, u8 mask,
> if ((status & mask) == mask)
> return 0;
>
> + sts_mask = mask & (TPM_STS_VALID | TPM_STS_DATA_AVAIL |
> + TPM_STS_COMMAND_READY);
> /* check which status changes can be handled by irqs */
> - if (priv->int_mask & TPM_INTF_STS_VALID_INT)
> - sts_mask |= TPM_STS_VALID;
> -
> - if (priv->int_mask & TPM_INTF_DATA_AVAIL_INT)
> - sts_mask |= TPM_STS_DATA_AVAIL;
> -
> - if (priv->int_mask & TPM_INTF_CMD_READY_INT)
> - sts_mask |= TPM_STS_COMMAND_READY;
> -
> - sts_mask &= mask;
> + sts_mask = tpm_tis_filter_sts_mask(priv->int_mask, sts_mask);
>
> stop = jiffies + timeout;
> /* process status changes with irq support */
> --
> 2.25.1
>

Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>

BR, Jarkko

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