linux-kernel - Re: [PATCH] mmc: loongson2: prevent integer overflow in ret variable

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Message-ID: <CAPDyKFq5S2srT4qf8wJKgA-Qhry1j=xrfWFipLjUc9weVZrBFA@mail.gmail.com>
Date: Wed, 9 Jul 2025 16:02:33 +0200
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Sergio Perez Gonzalez <sperezglz@...il.com>
Cc: zhoubinbin@...ngson.cn, linux-mmc@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mmc: loongson2: prevent integer overflow in ret variable

On Mon, 7 Jul 2025 at 20:56, Sergio Perez Gonzalez <sperezglz@...il.com> wrote:
>
> In loongson2_mmc_dll_mode_init(), `ret` variable is declared
> as u32 but it is expected to hold an int value.
>
> Fixes: d0f8e961deae ("mc: loongson2: Add Loongson-2K2000 SD/SDIO/eMMC controller driver")
> Reported-by: https://scan7.scan.coverity.com/#/project-view/53936/11354?selectedIssue=1644958
>
> Signed-off-by: Sergio Perez Gonzalez <sperezglz@...il.com>

Applied for next, thanks!

Kind regards
Uffe


> ---
>  drivers/mmc/host/loongson2-mmc.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/loongson2-mmc.c b/drivers/mmc/host/loongson2-mmc.c
> index 515ccf834f0a..ba6bb8fd5535 100644
> --- a/drivers/mmc/host/loongson2-mmc.c
> +++ b/drivers/mmc/host/loongson2-mmc.c
> @@ -485,7 +485,8 @@ static irqreturn_t loongson2_mmc_irq(int irq, void *devid)
>
>  static void loongson2_mmc_dll_mode_init(struct loongson2_mmc_host *host)
>  {
> -       u32 val, pad_delay, delay, ret;
> +       u32 val, pad_delay, delay;
> +       int ret;
>
>         regmap_update_bits(host->regmap, LOONGSON2_MMC_REG_SEL,
>                            LOONGSON2_MMC_SEL_DATA, LOONGSON2_MMC_SEL_DATA);
> --
> 2.43.0
>