linux-kernel - Re: [PATCH v2] mmc: meson-gx: Remove setting of CMD_CFG

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Date:   Thu, 26 Oct 2023 11:01:53 +0200
From:   Jerome Brunet <jbrunet@...libre.com>
To:     "Rong.Chen" <rong.chen@...ogic.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Neil Armstrong <narmstrong@...libre.com>,
        Kevin Hilman <khilman@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     linux-mmc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mmc: meson-gx: Remove setting of CMD_CFG_ERROR


On Thu 26 Oct 2023 at 15:31, "Rong.Chen" <rong.chen@...ogic.com> wrote:

> From: Rong Chen <rong.chen@...ogic.com>
>
> For the t7 and older SoC families, the CMD_CFG_ERROR has no effect.
> Starting from SoC family C3, setting this bit without SG LINK data
> address will cause the controller to generate an IRQ and stop working.
>
> To fix it, don't set the bit CMD_CFG_ERROR anymore.
>
> Fixes: 18f92bc02f17 ("mmc: meson-gx: make sure the descriptor is stopped on errors")
> Signed-off-by: Rong Chen <rong.chen@...ogic.com>
> ---
>  drivers/mmc/host/meson-gx-mmc.c | 1 -
>  1 file changed, 1 deletion(-)
>
> diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c
> index 9837dab096e6..c7c067b9415a 100644
> --- a/drivers/mmc/host/meson-gx-mmc.c
> +++ b/drivers/mmc/host/meson-gx-mmc.c
> @@ -801,7 +801,6 @@ static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd)
>  
>  	cmd_cfg |= FIELD_PREP(CMD_CFG_CMD_INDEX_MASK, cmd->opcode);
>  	cmd_cfg |= CMD_CFG_OWNER;  /* owned by CPU */
> -	cmd_cfg |= CMD_CFG_ERROR; /* stop in case of error */
>  
>  	meson_mmc_set_response_bits(cmd, &cmd_cfg);

Reviewed-by: Jerome Brunet <jbrunet@...libre.com>