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From: David Marchand <david.marchand@redhat.com>
To: Gaetan Rivet <grive@u256.net>
Cc: dev <dev@dpdk.org>, Hemant Agrawal <hemant.agrawal@nxp.com>,
	 Sachin Saxena <sachin.saxena@oss.nxp.com>
Subject: Re: [dpdk-dev] [PATCH] bus/dpaa: optimize device name parsing
Date: Mon, 9 Nov 2020 12:58:13 +0100
Message-ID: <CAJFAV8xtCCjneYkhJ8q6m=2hRKf+a590tPTDZj8sf3r6zCev1w@mail.gmail.com> (raw)
In-Reply-To: <20201109113147.962882-1-grive@u256.net>

On Mon, Nov 9, 2020 at 12:32 PM Gaetan Rivet <grive@u256.net> wrote:
> +       delta = 0;
> +       if (strncmp(name, "dpaa_bus:", 9) == 0) {
> +               delta = 9;
> +       } else if (strncmp(name, "name=", 5) == 0) {
> +               delta = 5;
> +       }
> +
> +       if (sscanf(&name[delta], "fm%u-mac%u", &i, &j) == 2) {
> +               if (i >= 2 || j >= 16)
> +                       return -EINVAL;
> +               if (out != NULL) {
> +                       char *out_name = out;
> +
> +                       if (rte_strscpy(out_name, &name[delta], 10) < 0)
> +                               return -ENAMETOOLONG;
> +                       /* Because 'i' can only be 0 or 1, fm%u is fixed size ;
> +                        * mac%u needs to be checked for optional end ','.
> +                        */
> +                       if (out_name[9] == ',')
> +                               out_name[9] = '\0';
>                 }
> +               return 0;
> +       } else {
> +               return -EINVAL;
>         }

Mmm, we always return from each of the previous branches?
Then the ENODEV return after is dead code.

Reading again the diff, you could probably return at the sscanf step.
if (sscanf(&name[delta], "fm%u-mac%u", &i, &j) != 2 || i >= 2 || j >= 16)
        return -EINVAL;


>
> -       free(dup_name);
> -       return -EINVAL;
> +       return -ENODEV;
>  }
>
>  #define DPAA_DEV_PATH1 "/sys/devices/platform/soc/soc:fsl,dpaa"


-- 
David Marchand


  parent reply	other threads:[~2020-11-09 11:58 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-09 11:31 Gaetan Rivet
2020-11-09 11:44 ` Gaëtan Rivet
2020-11-09 11:58 ` David Marchand [this message]
2020-11-09 13:36   ` Gaëtan Rivet
2020-11-09 13:37 ` [dpdk-dev] [PATCH v2] " Gaetan Rivet
2021-01-15 11:16   ` Thomas Monjalon

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