Commit d4535b90 authored by Markus Schneider-Pargmann's avatar Markus Schneider-Pargmann Committed by Marc Kleine-Budde
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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: default avatarMarkus Schneider-Pargmann <msp@baylibre.com>
Link: https://lore.kernel.org/all/20221206115728.1056014-5-msp@baylibre.com


Signed-off-by: default avatarMarc Kleine-Budde <mkl@pengutronix.de>
parent fac52bf7

drivers/net/can/m_can/m_can.c

+2 −3
Original line number Diff line number Diff line
@@ -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);