linux-kernel - Re: [PATCH] drivers/video/pmagb-b-fb.c: Improve diagnostics

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Message-Id: <200709172030.08568.m.kozlowski@tuxland.pl>
Date:	Mon, 17 Sep 2007 20:30:08 +0200
From:	Mariusz Kozlowski <m.kozlowski@...land.pl>
To:	"Maciej W. Rozycki" <macro@...ux-mips.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Antonino Daplas <adaplas@....net>,
	linux-fbdev-devel@...ts.sourceforge.net, linux-mips@...ux-mips.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers/video/pmagb-b-fb.c: Improve diagnostics

Hello,

>  Add error messages to the probe call.

You added them but probably forgot to return them ;)

>  While they may rarely trigger, they may be useful when something weird is 
> going on.  Also this is good style.

[snip]
 
> patch-mips-2.6.18-20060920-pmagb-b-err-1
> diff -up --recursive --new-file linux-mips-2.6.18-20060920.macro/drivers/video/pmagb-b-fb.c linux-mips-2.6.18-20060920/drivers/video/pmagb-b-fb.c
> --- linux-mips-2.6.18-20060920.macro/drivers/video/pmagb-b-fb.c	2006-12-16 16:44:41.000000000 +0000
> +++ linux-mips-2.6.18-20060920/drivers/video/pmagb-b-fb.c	2006-12-16 16:44:52.000000000 +0000
> @@ -254,16 +254,23 @@ static int __init pmagbbfb_probe(struct 
>  	struct pmagbbfb_par *par;
>  	char freq0[12], freq1[12];
>  	u32 vid_base;
> +	int err = 0;  

[snip]

> -	if (register_framebuffer(info) < 0)
> +	err = register_framebuffer(info);
> +	if (err < 0) {
> +		printk(KERN_ERR "%s: Cannot register framebuffer\n",
> +		       dev->bus_id);
>  		goto err_smem_map;
> +	}
>  
>  	get_device(dev);

Sth like this is missing?

@@ -330,7 +350,7 @@ err_cmap:

 err_alloc:
 	framebuffer_release(info);
-	return -ENXIO;
+	return err;
 }

No?

Regards,

	Mariusz
-
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