Re: [Xen-devel] [PATCH] xen: netback: remove redundant xenvif_put

[Ian Campbell]

On Tue, 2013-02-19 at 08:03 +0000, Jan Beulich wrote:
> >>> On 19.02.13 at 06:53, David Miller <davem@xxxxxxxxxxxxx> wrote:
> > From: Andrew Jones <drjones@xxxxxxxxxx>
> > Date: Mon, 18 Feb 2013 21:29:20 +0100
> > 
> >> netbk_fatal_tx_err() calls xenvif_carrier_off(), which does
> >> a xenvif_put(). As callers of netbk_fatal_tx_err should only
> >> have one reference to the vif at this time, then the xenvif_put
> >> in netbk_fatal_tx_err is one too many.
> >> 
> >> Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx>
> > 
> > Applied.
> 
> But this is wrong from all we can tell,

Yes, please can this be reverted.

>  we discussed this before
> (Wei pointed to the discussion in an earlier reply). The core of
> it is that the put here parallels the one in netbk_tx_err(), and
> the one in xenvif_carrier_off() matches the get from
> xenvif_connect() (which normally would be done on the path
> coming through xenvif_disconnect()).

Perhaps Andrew was looking at the tree before "xen-netback: correctly
return errors from netbk_count_requests()" which fixed a different case
of a double put which may have appeared to be fixed by this change too.

Ian.

> And anyway - shouldn't changes to netback require an ack from
> Ian?
> 
> Jan
> 


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