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Subject: Re: [PATCH v1] can: mcp251xfd: use regmap_bulk_write for
 compatibility
To:     Marc Kleine-Budde <mkl@pengutronix.de>,
        manivannan.sadhasivam@linaro.org, thomas.kopp@microchip.com,
        wg@grandegger.com, davem@davemloft.net, kuba@kernel.org,
        lgirdwood@gmail.com, broonie@kernel.org
Cc:     linux-can@vger.kernel.org, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20210122030214.166334-1-suyanjun218@gmail.com>
 <7007275e-a271-8160-729b-67e4d579dfe2@pengutronix.de>
From:   Su <suyanjun218@gmail.com>
Message-ID: <a19c70eb-6478-836a-8b39-be34101bdcae@gmail.com>
Date:   Fri, 22 Jan 2021 15:59:22 +0800
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在 2021/1/22 下午3:26, Marc Kleine-Budde 写道:
> On 1/22/21 4:02 AM, Su Yanjun wrote:
>> Recently i use mcp2518fd on 4.x kernel which multiple write is not
>> backported, regmap_raw_write will cause old kernel crash because the
>> tx buffer in driver is smaller then 2K. Use regmap_bulk_write instead
>> for compatibility.
> Hmmm, this patch will never be backported to any 4.x kernel, as the driver is
> not available on these kernels. You have to carry patches for these kernels
> anyway, so I think I'll not take that patch. Sorry. Drop me a note if you are
> interested in updating your kernel to a recent v5.11 kernel.

I got it. I have already port it to 4.x kernel. I just want anyone 
working on old kernels to use the driver more easier.

Thanks.

>
> regards,
> Marc
>