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| author | Markus Schneider-Pargmann <msp@baylibre.com> | 2022-12-06 12:57:21 +0100 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2022-12-12 11:58:32 +0100 |
| commit | d4535b90a76af49d1dd7bc70ad0311a88ac5313d (patch) | |
| tree | ee08c44a08973fb55593f0da4cc91a6178181426 /drivers/net | |
| parent | fac52bf786e5c302990fa79f2fdde24e84f810b0 (diff) | |
| download | linux-stable-d4535b90a76af49d1dd7bc70ad0311a88ac5313d.tar.gz linux-stable-d4535b90a76af49d1dd7bc70ad0311a88ac5313d.tar.bz2 linux-stable-d4535b90a76af49d1dd7bc70ad0311a88ac5313d.zip | |
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>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/can/m_can/m_can.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 045679af76a0..83d3a7f191bf 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -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); |