linux-kernel - Re: [PATCH v1 2/2] mmc: core: Allows to override the timeout value for ioctl() path

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Date:   Tue, 26 Apr 2022 15:55:08 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Bean Huo <huobean@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>
Cc:     adrian.hunter@...el.com, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org, beanhuo@...ron.com,
        stable <stable@...r.kernel.org>
Subject: Re: [PATCH v1 2/2] mmc: core: Allows to override the timeout value
 for ioctl() path

On Sun, 24 Apr 2022 at 00:16, Bean Huo <huobean@...il.com> wrote:
>
> From: Bean Huo <beanhuo@...ron.com>
>
> Occasionally, user-land applications initiate longer timeout values for certain commands
> through ioctl() system call. But so far we are still using a fixed timeout of 10 seconds
> in mmc_poll_for_busy() on the ioctl() path, even if a custom timeout is specified in the
> userspace application. This patch allows custom timeout values to override this default
> timeout values on the ioctl path.
>
> Cc: stable <stable@...r.kernel.org>
> Signed-off-by: Bean Huo <beanhuo@...ron.com>

Applied for next, thanks!

Linus, I interpreted your earlier reply as a reviewed-by tag, so I
have added that. Please tell me, if you want me to drop it.

Kind regards
Uffe


> ---
>  drivers/mmc/core/block.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
> index b35e7a95798b..6cb701aa1abc 100644
> --- a/drivers/mmc/core/block.c
> +++ b/drivers/mmc/core/block.c
> @@ -609,11 +609,11 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
>
>         if (idata->rpmb || (cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
>                 /*
> -                * Ensure RPMB/R1B command has completed by polling CMD13
> -                * "Send Status".
> +                * Ensure RPMB/R1B command has completed by polling CMD13 "Send Status". Here we
> +                * allow to override the default timeout value if a custom timeout is specified.
>                  */
> -               err = mmc_poll_for_busy(card, MMC_BLK_TIMEOUT_MS, false,
> -                                       MMC_BUSY_IO);
> +               err = mmc_poll_for_busy(card, idata->ic.cmd_timeout_ms ? : MMC_BLK_TIMEOUT_MS,
> +                                       false, MMC_BUSY_IO);
>         }
>
>         return err;
> --
> 2.34.1
>