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Date:   Sun, 17 Oct 2021 22:44:12 +0200
From:   Marc Kleine-Budde <>
To:     Aswath Govindraju <>
Cc:     Lokesh Vutla <>,
        Chandrasekar Ramakrishnan <>,
        Wolfgang Grandegger <>,
        "David S. Miller" <>,
        Jakub Kicinski <>,
        Matt Kline <>,,,
Subject: Re: [PATCH] can: m_can: m_can_platform: Fix iomap_read_fifo() and

On 20.09.2021 18:03:43, Aswath Govindraju wrote:
> The read and writes from the fifo are from a buffer, with various fields
> and data at predefined offsets. So, they should not be done to the same
> address(or port) in case of val_count greater than 1. Therefore, fix this
> by using iowrite32/ioread32 instead of ioread32_rep/iowrite32_rep.
> Also, the write into fifo must be performed with an offset from the message
> ram base address. Therefore, fix the base address to mram_base.
> Fixes: e39381770ec9 ("can: m_can: Disable IRQs on FIFO bus errors")
> Signed-off-by: Aswath Govindraju <>

Applied to linux-can/testing.


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

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