linux-kernel - Re: [PATCH 3/4] firmware: fold successful fw read early

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Date:	Sun, 9 Aug 2015 09:29:55 -0400
From:	Ming Lei <ming.lei@...onical.com>
To:	"Luis R. Rodriguez" <mcgrof@...not-panic.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jonathan Corbet <corbet@....net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	David Woodhouse <dwmw2@...radead.org>,
	David Howells <dhowells@...hat.com>,
	seth.forshee@...onical.com, Rusty Russell <rusty@...tcorp.com.au>,
	Michal Marek <mmarek@...e.cz>,
	Matthew Garrett <mjg59@...f.ucam.org>, kyle@...nel.org,
	linux-security-module <linux-security-module@...r.kernel.org>,
	keyrings@...ux-nfs.org, "Luis R. Rodriguez" <mcgrof@...e.com>
Subject: Re: [PATCH 3/4] firmware: fold successful fw read early

On Tue, Aug 4, 2015 at 6:00 PM, Luis R. Rodriguez
<mcgrof@...not-panic.com> wrote:
> From: David Howells <dhowells@...hat.com>
>
> We'll be folding in some more checks on fw_read_file_contents(),
> this will make the success case easier to follow.
>
> Signed-off-by: David Howells <dhowells@...hat.com>
> Signed-off-by: Luis R. Rodriguez <mcgrof@...e.com>
> ---
>  drivers/base/firmware_class.c | 16 +++++++---------
>  1 file changed, 7 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
> index 9ee334c1b872..736fb952b75b 100644
> --- a/drivers/base/firmware_class.c
> +++ b/drivers/base/firmware_class.c
> @@ -361,20 +361,18 @@ static int fw_get_filesystem_firmware(struct device *device,
>                         continue;
>                 rc = fw_read_file_contents(file, buf);
>                 fput(file);
> -               if (rc)
> +               if (rc == 0) {
> +                       dev_dbg(device, "system data: direct-loading firmware %s\n",
> +                               buf->fw_id);
> +                       fw_finish_direct_load(device, buf);
> +                       goto out;

'break' should be enough, and the following 'out' label can be saved too.

> +               } else
>                         dev_warn(device, "system data, attempted to load %s, but failed with error %d\n",
>                                  path, rc);
> -               else
> -                       break;
>         }
> +out:
>         __putname(path);
>
> -       if (!rc) {
> -               dev_dbg(device, "system data: direct-loading firmware %s\n",
> -                       buf->fw_id);
> -               fw_finish_direct_load(device, buf);
> -       }
> -
>         return rc;
>  }
>
> --
> 2.3.2.209.gd67f9d5.dirty
>
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