[PATCH v8 06/11] tpm, tpm_tis: Move interrupt mask checks into own function

From: Lino Sanfilippo
Date: Mon Oct 17 2022 - 19:58:50 EST


From: Lino Sanfilippo <l.sanfilippo@xxxxxxxxxx>

Clean up wait_for_tpm_stat() by moving multiple similar interrupt mask
checks into an own function.

Signed-off-by: Lino Sanfilippo <l.sanfilippo@xxxxxxxxxx>
Suggested-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Reviewed-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
---
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 d07debc3182c..181c291b0bb8 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 what 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 */
--
2.36.1