netdev - Re: [PATCH 1/3] net-gianfar: Less function calls in gfar_ethflow_to_filer

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Date:	Fri, 1 Jan 2016 15:45:15 +0100
From:	Francois Romieu <romieu@...zoreil.com>
To:	Julia Lawall <julia.lawall@...6.fr>
Cc:	SF Markus Elfring <elfring@...rs.sourceforge.net>,
	netdev@...r.kernel.org,
	Claudiu Manoil <claudiu.manoil@...escale.com>,
	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 1/3] net-gianfar: Less function calls in
 gfar_ethflow_to_filer_table() after error detection

Julia Lawall <julia.lawall@...6.fr> :
> On Fri, 1 Jan 2016, SF Markus Elfring wrote:
[...]
> > > Normally, one returns -ENOMEM for this case, but it looks like this 
> > > function is returning 0 on failure.
> > 
> > Should a symbol like "false" be used instead of such a special number?
> 
> Maybe it's better than 0 and 1...

Your suggestion about -ENOMEM is consistent with the callchain. Nothing
else is needed.

Btw:
1. kfree does not care about NULL parameter, especially in this hardly
   timing sensitive path.
2. kmalloc_array for small kernel controlled arrays of integers (see
   drivers/net/ethernet/freescale/gianfar.h), seriously ?

   I'd suggest the janitor to introduce a dedicated struct to embed both
   gfar_private.ftp_rqf{p, c}r then use a single, plain kmalloc in
   gfar_ethflow_to_filer_table.

Happy tasteful 2016 :o)

-- 
Ueimor
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