linux-kernel - Re: [PATCH v3] can: mcan: Add support for handling DLEC error on CAN FD

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Date:   Fri, 14 Oct 2022 15:02:20 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Vivek Yadav <vivek.2311@...sung.com>
Cc:     rcsekar@...sung.com, wg@...ndegger.com, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        pankaj.dubey@...sung.com, ravi.patel@...sung.com,
        linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] can: mcan: Add support for handling DLEC error on CAN
 FD

On 14.10.2022 17:16:13, Vivek Yadav wrote:
> When a frame in CAN FD format has reached the data phase, the next
> CAN event (error or valid frame) will be shown in DLEC.
> 
> Utilizes the dedicated flag (Data Phase Last Error Code: DLEC flag) to
> determine the type of last error that occurred in the data phase
> of a CAN FD frame and handle the bus errors.

Can you please test your code before sending it.

| drivers/net/can/m_can/m_can.c: In function ‘m_can_handle_bus_errors’:
| include/linux/build_bug.h:16:51: error: negative width in bit-field ‘<anonymous>’
|    16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); })))
[...]
| drivers/net/can/m_can/m_can.c:883:17: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
|   883 |                 u8 dlec = FIELD_GET(PSR_DLEC_MASK, psr);
|       |                 ^~

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
Embedded Linux                   | https://www.pengutronix.de  |
Vertretung West/Dortmund         | Phone: +49-231-2826-924     |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-5555 |

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