Re: [PATCH 1/2]drivers/usb/core/sysfs.c Fix variable 'retval' setbut not used
From: Greg KH
Date: Tue Aug 03 2010 - 11:50:24 EST
On Tue, Aug 03, 2010 at 11:34:26AM -0400, Alan Stern wrote:
> On Tue, 3 Aug 2010 Valdis.Kletnieks@xxxxxx wrote:
> > > Failure to create a file in sysfs is almost never fatal and usually not
> > > even dangerous. Ignoring the error is generally better than failing
> > > the entire operation.
> > Then why the __must_check attribute if it's usually ignorable? I thought
> > that was reserved for functions that you damned sight better well check
> > for errors because bad things are afoot otherwise?
> That's a good question. Perhaps Greg KH knows the answer.
You should check the return value for that function. To not do that is
a bug. This one looks like it snuck through. Fixing it properly is the
correct thing to do.
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