Re: [PATCH] SYSFS: Fix return values for sysdev_store_{ulong,int}

From: Andi Kleen
Date: Fri Oct 17 2008 - 02:18:51 EST

On Thu, Oct 16, 2008 at 01:35:30PM -0700, Andrew Morton wrote:
> On Mon, 13 Oct 2008 12:03:03 +0200
> Andi Kleen <andi@xxxxxxxxxxxxxx> wrote:
> > SYSFS: Fix return values for sysdev_store_{ulong,int}
> >
> > Always return the full size instead of the consumed
> > length of the string in sysdev_store_{ulong,int}
> >
> > This avoids EINVAL errors in some echo versions.
> That sounds fairly serious. Is this a regression or are those versions
> of echo really ancient, or...?

It's a regression, but it currently only affects the mce sysfs files,
which are the only ones using it. Also the EINVAL is more a cosmetic
issue because the first write will already change the value successfully,
only the second one will fail but not change anything.


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