[U-Boot] [PATCH] smc911x driver: cleanup smc911x_initialize()

[Matthias Kaehlcke]

Hi Ben,

El Thu, Jan 21, 2010 at 11:36:41PM -0800 Ben Warren ha dit:

>    On Thu, Jan 21, 2010 at 10:18 PM, Matthias Kaehlcke
>    <matthias at kaehlcke.net> wrote:
> 
>      El Thu, Jan 21, 2010 at 06:01:47PM -0500 Mike Frysinger ha dit:
>      > On Thursday 21 January 2010 16:29:24 Matthias Kaehlcke wrote:
>      > > smc911x_initialize(): remove unecessary call to free() and
>      > > return 0 in case of failure instead of -1
>      > >
>      > > Signed-off-by: Matthias Kaehlcke <matthias at kaehlcke.net>
>      > > ---
>      > >  drivers/net/smc911x.c |    3 +--
>      > >  1 files changed, 1 insertions(+), 2 deletions(-)
>      > >
>      > > diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c
>      > > index 5d51406..f2b5895 100644
>      > > --- a/drivers/net/smc911x.c
>      > > +++ b/drivers/net/smc911x.c
>      > > @@ -242,8 +242,7 @@ int smc911x_initialize(u8 dev_num, int
>      base_addr)
>      > >
>      > >     dev = malloc(sizeof(*dev));
>      > >     if (!dev) {
>      > > -           free(dev);
>      >
>      > OK
>      >
>      > > -           return -1;
>      > > +           return 0;
>      >
>      > this is an error path, so i think -1 is correct.  if you're out of
>      memory,
>      > increase your malloc region.
> 
>      that's what I thought in the first place, but Ben Warren told me that
>      in the initialize function the return value indicates the number of
>      devices that were initialized (see
>      http://lists.denx.de/pipermail/u-boot/2010-January/066859.html)
> 
>    I agree that this is confusing.  If the following xxx_eth_initialize()
>    return codes seem reasonable, I'll send a patch tomorrow that applies it
>    to the logic in net/eth.c:
>    -2: reserved (magic value, used to return from __def_eth_init())
>    -1: error
>    0: no devices added, no error
>    1+: number of devices added

to me it seems reasonable and less confusing than the current logic.

i can collaborate in the task of applying it to the driver code

-- 
Matthias Kaehlcke
Embedded Linux Developer
Barcelona

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