netdev - Re: question about netif

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Message-ID: <alpine.DEB.2.02.1308141713290.2257@hadrien>
Date:	Wed, 14 Aug 2013 17:18:51 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Rami Rosen <roszenrami@...il.com>
cc:	Francois Romieu <romieu@...zoreil.com>,
	David Shwatrz <dshwatrz@...il.com>,
	Julia Lawall <julia.lawall@...6.fr>, grant.likely@...aro.org,
	rob.herring@...xeda.com, Netdev <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	devicetree@...r.kernel.org
Subject: Re: question about netif_rx

On Wed, 14 Aug 2013, Rami Rosen wrote:

> Hi,
> BTW, this is not the only NAPI issue here. When looking into cleanup
> of resources in this driver, a call to netif_napi_del() is missing
> (though there is a call to  napi_disable(), which is not enough for
> proper cleanup).

Actually, netif_napi_del seems to be quite underused.  At least
approximately, I would assume that every file that uses netif_napi_add
should use netif_napi_del at least once, and possible more times.  But I
find 118 .c files that use netif_napi_add, and only 35 that use
netif_napi_del.

Are there some cases where it might not be needed?

julia
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