LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Willy Tarreau <w@1wt.eu>
To: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/3] staging: panel: return register value
Date: Mon, 9 Mar 2015 07:30:07 +0100	[thread overview]
Message-ID: <20150309063007.GC6038@1wt.eu> (raw)
In-Reply-To: <1425836246-15355-2-git-send-email-sudipm.mukherjee@gmail.com>

On Sun, Mar 08, 2015 at 11:07:25PM +0530, Sudip Mukherjee wrote:
> we were returning success even if the module failed to register.
> now we are returning the actual return value, success or error.
> 
> Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
> ---
>  drivers/staging/panel/panel.c | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)
> 
> diff --git a/drivers/staging/panel/panel.c b/drivers/staging/panel/panel.c
> index 3ef3dcf..b4c143a 100644
> --- a/drivers/staging/panel/panel.c
> +++ b/drivers/staging/panel/panel.c
> @@ -2360,11 +2360,6 @@ static int __init panel_init_module(void)
>  		return -ENODEV;
>  	}
>  
> -	if (parport_register_driver(&panel_driver)) {
> -		pr_err("could not register with parport. Aborting.\n");
> -		return -EIO;
> -	}
> -
>  	if (pprt)
>  		pr_info("driver version " PANEL_VERSION
>  			" registered on parport%d (io=0x%lx).\n", parport,
> @@ -2375,7 +2370,7 @@ static int __init panel_init_module(void)
>  	/* tells various subsystems about the fact that initialization
>  	   is finished */
>  	init_in_progress = 0;
> -	return 0;
> +	return parport_register_driver(&panel_driver);

Here I'd rather keep the error message, as it's quite annoying when a
driver does not load and you don't know why, especially with something
like parport where there are many possible causes. Something like this
would be better in my opinion :

-	return 0;
+	err = parport_register_driver(&panel_driver);
+	if (err)
+		pr_err("could not register with parport. Aborting.\n");
+	return err;

Well, I just found that currently parport_register_driver() always
succeeds, but I still think it's better to verbosely handle errors.

Thanks,
Willy


  reply	other threads:[~2015-03-09  6:30 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-08 17:37 [PATCH 1/3] staging: panel: register reboot Sudip Mukherjee
2015-03-08 17:37 ` [PATCH 2/3] staging: panel: return register value Sudip Mukherjee
2015-03-09  6:30   ` Willy Tarreau [this message]
2015-03-09 13:35     ` Sudip Mukherjee
2015-03-09 15:05       ` Willy Tarreau
2015-03-08 17:37 ` [PATCH 3/3] staging: panel: remove initialization check Sudip Mukherjee
2015-03-09  6:20   ` Willy Tarreau
2015-03-09  6:19 ` [PATCH 1/3] staging: panel: register reboot Willy Tarreau

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20150309063007.GC6038@1wt.eu \
    --to=w@1wt.eu \
    --cc=devel@driverdev.osuosl.org \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=sudipm.mukherjee@gmail.com \
    --subject='Re: [PATCH 2/3] staging: panel: return register value' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).