Commit 5e269324 authored Aug 15, 2019 by Joakim Zhang Committed by Marc Kleine-Budde Nov 04, 2019

can: flexcan: disable completely the ECC mechanism



The ECC (memory error detection and correction) mechanism can be
activated or not, controlled by the ECCDIS bit in CAN_MECR. When
disabled, updates on indications and reporting registers are stopped.
So if want to disable ECC completely, had better assert ECCDIS bit, not
just mask the related interrupts.

Fixes: cdce8448 ("can: flexcan: add vf610 support for FlexCAN")
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

parent 37597394

drivers/net/can/flexcan.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1188,6 +1188,7 @@ static int flexcan_chip_start(struct net_device *dev)
		reg_mecr = priv->read(&regs->mecr);
		reg_mecr &= ~FLEXCAN_MECR_ECRWRDIS;
		priv->write(reg_mecr, &regs->mecr);
		reg_mecr \|= FLEXCAN_MECR_ECCDIS;
		reg_mecr &= ~(FLEXCAN_MECR_NCEFAFRZ \| FLEXCAN_MECR_HANCEI_MSK \|
		FLEXCAN_MECR_FANCEI_MSK);
		priv->write(reg_mecr, &regs->mecr);

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