The function flexcan_irq_state() checks the controller for CAN state
changes and pushes a skb with the new state and a timestamp into the
rx-offload framework.
This patch optimizes the function by only reading the timestamp, if a
state change is detected.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
u32 timestamp;
int err;
- timestamp = priv->read(®s->timer) << 16;
-
flt = reg_esr & FLEXCAN_ESR_FLT_CONF_MASK;
if (likely(flt == FLEXCAN_ESR_FLT_CONF_ACTIVE)) {
tx_state = unlikely(reg_esr & FLEXCAN_ESR_TX_WRN) ?
if (likely(new_state == priv->can.state))
return;
+ timestamp = priv->read(®s->timer) << 16;
+
skb = alloc_can_err_skb(dev, &cf);
if (unlikely(!skb))
return;