can: flexcan: disable completely the ECC mechanism

[ Upstream commit 5e269324db5adb2f5f6ec9a93a9c7b0672932b47 ]

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: cdce844865be ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index baef09b9449f9b864163e070b09d64c82091f28e..6b866d0451b21d69cd7ded47f1d959c3a31ce5b4 100644 (file)
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -923,6 +923,7 @@ static int flexcan_chip_start(struct net_device *dev)
                reg_mecr = flexcan_read(&regs->mecr);
                reg_mecr &= ~FLEXCAN_MECR_ECRWRDIS;
                flexcan_write(reg_mecr, &regs->mecr);
+               reg_mecr |= FLEXCAN_MECR_ECCDIS;
                reg_mecr &= ~(FLEXCAN_MECR_NCEFAFRZ | FLEXCAN_MECR_HANCEI_MSK |
                              FLEXCAN_MECR_FANCEI_MSK);
                flexcan_write(reg_mecr, &regs->mecr);