Re: [PATCH 1/2]drivers/usb/core/sysfs.c Fix variable 'retval' set but not used

From: Valdis . Kletnieks
Date: Tue Aug 03 2010 - 07:28:44 EST

On Mon, 02 Aug 2010 21:26:28 PDT, "Justin P. Mattock" said:
> diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c

> if (alt->string)
> - retval = device_create_file(&intf->dev, &dev_attr_interface);
> + device_create_file(&intf->dev, &dev_attr_interface);
> intf->sysfs_files_created = 1;
> return 0;

What should the code do if device_create_file() manages to fail? Yes, ignoring
the return value is one option, but is it the best one? 'return ret;' might be
another one. Somebody who understands this code and has more caffeine than me
should look this over.

(Nothing personal Justin - it's just my opinion that *anytime* we have a patch
that remove a check for a return code, it needs to justify that ignoring the
return code is appropriate).

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