Re: [PATCH net] can: ctucanfd: handle bus error interrupts

[Pavel Pisa <pisa@cmp.felk.cvut.cz>]

Hello Avi,

thanks for correction.

On Thursday 23 of July 2026 09:44:03 Avi Weiss wrote:
> Include REG_INT_STAT_BEI in the top-level error interrupt condition.
>
> BEI is enabled when CAN_CTRLMODE_BERR_REPORTING is requested and
> ctucan_err_interrupt() already handles it. Without checking and
> clearing BEI in the top-level handler, bus error interrupts are not
> handled or acknowledged.
>
> Fixes: 2dcb8e8782d8 ("can: ctucanfd: add support for CTU CAN FD open-source
> IP core - bus independent part.") Signed-off-by: Avi Weiss
> <thnkslprpt@gmail.com>
> ---
>  drivers/net/can/ctucanfd/ctucanfd_base.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/can/ctucanfd/ctucanfd_base.c
> b/drivers/net/can/ctucanfd/ctucanfd_base.c index 0ea1ff28dfce..0cd2d428c1f1
> 100644
> --- a/drivers/net/can/ctucanfd/ctucanfd_base.c
> +++ b/drivers/net/can/ctucanfd/ctucanfd_base.c
> @@ -1136,8 +1136,12 @@ static irqreturn_t ctucan_interrupt(int irq, void
> *dev_id) /* Error interrupts */
>  		if (FIELD_GET(REG_INT_STAT_EWLI, isr) ||
>  		    FIELD_GET(REG_INT_STAT_FCSI, isr) ||
> -		    FIELD_GET(REG_INT_STAT_ALI, isr)) {
> -			icr = isr & (REG_INT_STAT_EWLI | REG_INT_STAT_FCSI | REG_INT_STAT_ALI);
> +		    FIELD_GET(REG_INT_STAT_ALI, isr) ||
> +		    FIELD_GET(REG_INT_STAT_BEI, isr)) {
> +			icr = isr & (REG_INT_STAT_EWLI |
> +				     REG_INT_STAT_FCSI |
> +				     REG_INT_STAT_ALI |
> +				     REG_INT_STAT_BEI);
>
>  			ctucan_netdev_dbg(ndev, "some ERR interrupt: clearing 0x%08x\n", icr);
>  			ctucan_write32(priv, CTUCANFD_INT_STAT, icr);

Acked-by: Pavel Pisa <pisa@fel.cvut.cz>


                Pavel Pisa
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