[PATCH] drivers: process failure of sysfs_create_group()

[PATCH] drivers: process failure of sysfs_create_group()

[Jianjun Kong]

drivers: drivers/video/uvesafb.c:
When fail to call sysfs_create_group(), it should recycle resources and return the error.
This patch fix for processing failure of sysfs_create_group().

Signed-off-by: Jianjun Kong <jianjun@zeuux.org>
---
 drivers/video/uvesafb.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c
index 6c2d37f..a78d4d9 100644
--- a/drivers/video/uvesafb.c
+++ b/drivers/video/uvesafb.c
@@ -1811,12 +1811,16 @@ static int __devinit uvesafb_probe(struct platform_device *dev)
 			info->fix.id);
 
 	err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
-	if (err != 0)
+	if (err != 0) {
 		printk(KERN_WARNING "fb%d: failed to register attributes\n",
 			info->node);
+		goto out_frame;
+	}
 
 	return 0;
 
+our_frame:
+	unregister_framebuffer(info);
 out_reg:
 	release_region(0x3c0, 32);
 out_unmap:
-- 
1.5.6.3

Re: [Linux-fbdev-devel] [PATCH] drivers: process failure of sysfs_create_group()

[Geert Uytterhoeven]

On Mon, 10 Nov 2008, Jianjun Kong wrote:
> drivers: drivers/video/uvesafb.c:
> When fail to call sysfs_create_group(), it should recycle resources and return the error.
> This patch fix for processing failure of sysfs_create_group().

IIRC, the reasoning behind the current code is that a failure to create sysfs
entries is not critical, as it doesn't impact the correct functioning of the
core of the driver.

> Signed-off-by: Jianjun Kong <jianjun@zeuux.org>
> ---
>  drivers/video/uvesafb.c |    6 +++++-
>  1 files changed, 5 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c
> index 6c2d37f..a78d4d9 100644
> --- a/drivers/video/uvesafb.c
> +++ b/drivers/video/uvesafb.c
> @@ -1811,12 +1811,16 @@ static int __devinit uvesafb_probe(struct platform_device *dev)
>  			info->fix.id);
>  
>  	err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
> -	if (err != 0)
> +	if (err != 0) {
>  		printk(KERN_WARNING "fb%d: failed to register attributes\n",
>  			info->node);
> +		goto out_frame;
> +	}
>  
>  	return 0;
>  
> +our_frame:
> +	unregister_framebuffer(info);
>  out_reg:
>  	release_region(0x3c0, 32);
>  out_unmap:

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds

Re: [Linux-fbdev-devel] [PATCH] drivers: process failure of sysfs_create_group()

[Michal Januszewski]

On Mon, Nov 10, 2008 at 22:30, Geert Uytterhoeven <geert@linux-m68k.org> wrote:

>> When fail to call sysfs_create_group(), it should recycle resources and return the error.
>> This patch fix for processing failure of sysfs_create_group().
>
> IIRC, the reasoning behind the current code is that a failure to create sysfs
> entries is not critical, as it doesn't impact the correct functioning of the
> core of the driver.

That's correct -- that was exactly my reasoning behind this code.

-- 
Michal Januszewski, Gentoo Linux Developer
http://people.gentoo.org/spock