linux-kernel - Re: [PATCH][5/5][resend] floppy.c: Fix device_create

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Date:	Mon, 19 Mar 2007 18:42:22 +0100
From:	Jesper Juhl <jesper.juhl@...il.com>
To:	Andi Kleen <ak@...e.de>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Trent Waddington" <trent.waddington@...il.com>,
	"Bartlomiej Zolnierkiewicz" <bzolnier@...il.com>,
	"Alan Cox" <alan@...rguk.ukuu.org.uk>, jesper.juhl@...il.com
Subject: Re: [PATCH][5/5][resend] floppy.c: Fix device_create_file() warning

On Monday 19 March 2007 16:20:00 Andi Kleen wrote:
> On Monday 19 March 2007 16:16, Jesper Juhl wrote:
> > On 19/03/07, Andi Kleen <ak@...e.de> wrote:
> > > > -            
> > > > device_create_file(&floppy_device[drive].dev,&dev_attr_cmos); +      
> > > >       err = device_create_file(&floppy_device[drive].dev,
> > > > &dev_attr_cmos); +             if (err)
> > > > +                     printk(KERN_WARNING "Unable to create sysfs
> > > > attribute " +                             "file for floppy device:
> > > > %s\n", +                             floppy_device[drive].name);
> > >
> > > That change looks pretty useless. Either the error should be handled
> > > correctly by bailing out or the warn_unused_results should be dropped.
> >
> > At least letting the user know that something failed is better than
> > the current situation of just failing silently I'd say.
>
> I don't think so. That's just bloat.
>

Ok, how about one of the following then?  
Personally I'd be ok with either one.


Either this : 

Signed-off-by: Jesper Juhl <jesper.juhl@...il.com>
---
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 577c621..9d543f3 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -4302,7 +4302,12 @@ static int __init floppy_init(void)
 		if (err)
 			goto out_flush_work;
 
-		device_create_file(&floppy_device[drive].dev,&dev_attr_cmos);
+		err = device_create_file(&floppy_device[drive].dev, &dev_attr_cmos);
+		if (err) {
+			printk(KERN_WARNING "Unable to create sysfs attribute "
+				"file for floppy device: %s\n", 
+				floppy_device[drive].name);
+			goto out_flush_work;
+		}
+
 		/* to be cleaned up... */
 		disks[drive]->private_data = (void *)(long)drive;
 		disks[drive]->queue = floppy_queue;


or this : 


Signed-off-by: Jesper Juhl <jesper.juhl@...il.com>
---
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 577c621..9d543f3 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -4302,7 +4302,12 @@ static int __init floppy_init(void)
 		if (err)
 			goto out_flush_work;
 
-		device_create_file(&floppy_device[drive].dev,&dev_attr_cmos);
+		err = device_create_file(&floppy_device[drive].dev, &dev_attr_cmos);
+		if (err)
+			goto out_flush_work;
+
 		/* to be cleaned up... */
 		disks[drive]->private_data = (void *)(long)drive;
 		disks[drive]->queue = floppy_queue;

-
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