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can: m_can: Count TXE FIFO getidx in the driver 

The getindex simply increases by one for every iteration. There is no
need to get the current getidx every time from a register. Instead we
can just count and wrap if necessary.

Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
Link: https://lore.kernel.org/all/20221206115728.1056014-5-msp@baylibre.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Markus Schneider-Pargmann 2022-12-06 12:57:21 +01:00 committed by Marc Kleine-Budde
parent fac52bf786
commit d4535b90a7
1 changed files with 2 additions and 3 deletions
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5
drivers/net/can/m_can/m_can.c
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@ -1030,15 +1030,13 @@ static int m_can_echo_tx_event(struct net_device *dev)
/* Get Tx Event fifo element count */
txe_count = FIELD_GET(TXEFS_EFFL_MASK, m_can_txefs);
fgi = FIELD_GET(TXEFS_EFGI_MASK, m_can_txefs);
/* Get and process all sent elements */
for (i = 0; i < txe_count; i++) {
u32 txe, timestamp = 0;
int err;
/* retrieve get index */
fgi = FIELD_GET(TXEFS_EFGI_MASK, m_can_read(cdev, M_CAN_TXEFS));
/* get message marker, timestamp */
err = m_can_txe_fifo_read(cdev, fgi, 4, &txe);
if (err) {
@ -1052,6 +1050,7 @@ static int m_can_echo_tx_event(struct net_device *dev)
/* ack txe element */
m_can_write(cdev, M_CAN_TXEFA, FIELD_PREP(TXEFA_EFAI_MASK,
fgi));
fgi = (++fgi >= cdev->mcfg[MRAM_TXE].num ? 0 : fgi);
/* update stats */
m_can_tx_update_stats(cdev, msg_mark, timestamp);