linux-kernel - Re: [PATCH v1] mmc: sdhci-of-dwcmshc: fix DMA 128MB boundary

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Message-ID: <8693c8ff-1310-48db-a680-d78a224a0245@intel.com>
Date: Wed, 21 Jan 2026 08:41:35 +0200
From: Adrian Hunter <adrian.hunter@...el.com>
To: <hehuan1@...incomputing.com>, <ulf.hansson@...aro.org>,
	<linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <ningyu@...incomputing.com>, <linmin@...incomputing.com>,
	<pinkesh.vaghela@...fochips.com>, <xuxiang@...incomputing.com>
Subject: Re: [PATCH v1] mmc: sdhci-of-dwcmshc: fix DMA 128MB boundary

On 14/01/2026 14:22, hehuan1@...incomputing.com wrote:
> From: Huan He <hehuan1@...incomputing.com>
> 
> This DWC MSHC has a 128MB limitation where the data buffer size and start
> address must not exceed the 128MB boundary. Registering the missing
> 'adma_write_desc' callback function.
> 
> Signed-off-by: Huan He <hehuan1@...incomputing.com>

Fixes tag?

Nevertheless:

Acked-by: Adrian Hunter <adrian.hunter@...el.com>

> ---
>  drivers/mmc/host/sdhci-of-dwcmshc.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
> index 51949cde0958..cabb709a8108 100644
> --- a/drivers/mmc/host/sdhci-of-dwcmshc.c
> +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
> @@ -1726,6 +1726,7 @@ static const struct sdhci_ops sdhci_dwcmshc_eic7700_ops = {
>  	.set_uhs_signaling = sdhci_eic7700_set_uhs_wrapper,
>  	.set_power = sdhci_set_power_and_bus_voltage,
>  	.irq = dwcmshc_cqe_irq_handler,
> +	.adma_write_desc = dwcmshc_adma_write_desc,
>  	.platform_execute_tuning = sdhci_eic7700_executing_tuning,
>  };
>