netdev - RE: [PATCH v2 net-next] ethtool: Remove inactive code snippet in ethtool_set_rxfh

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Date:	Fri, 21 Feb 2014 10:28:24 +0000
From:	Venkata Duvvuru <VenkatKumar.Duvvuru@...lex.Com>
To:	David Miller <davem@...emloft.net>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH v2 net-next] ethtool: Remove inactive code snippet in
 ethtool_set_rxfh_indir

> From: Venkat Duvvuru <VenkatKumar.Duvvuru@...lex.com>
> Date: Wed, 19 Feb 2014 13:20:25 +0530
> 
> > ethtool_rxfh_indir_default is invoked inside ethtool_set_rxfh_indir
> > when user_size is zero. However user_size can only be zero when
> > dev_size is zero in which case ethtool_get_rxfh_indir itself would
> > return EOPNOTSUPP error. "user_size = 0" can never happen unless
> > userspace ethtool sends user_size as zero beforing invoking the ioctl
> > for ETHTOOL_SRSSH, in which case we should return -EINVAL.
> >
> > v2: Modified commit message.
> >
> > Signed-off-by: Venkat Duvvuru <VenkatKumar.Duvvuru@...lex.com>
> 
> It looks like the author of this code intended user_size == 0 as a way to reset
> the indirection table to the default, did this ever work?

There is no option for --set-rxfh-indir to reset the indirection table. So ethtool cannot know that it has to fill user_size = 0 to reset the indirection table to default.
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