netdev - Re: [PATCH] [updated] PHY fixed driver: rework release path and update phy

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Message-ID: <20070720115039.05f50f0f@localhost.localdomain>
Date:	Fri, 20 Jul 2007 11:50:39 +0400
From:	Vitaly Bordug <vitb@...nel.crashing.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Jeff Garzik <jeff@...zik.org>, linuxppc-dev@...abs.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [updated] PHY fixed driver: rework release path and
 update phy_id notation

On Thu, 19 Jul 2007 23:23:37 -0700
Andrew Morton wrote:

> On Thu, 19 Jul 2007 03:38:04 +0400 Vitaly Bordug
> <vitb@...nel.crashing.org> wrote:
> 
> > 
> > device_bind_driver() error code returning has been fixed.  
> > release() function has been written, so that to free resources 
> > in correct way; the release path is now clean. 
> >  
> > Before the rework, it used to cause 
> >  Device 'fixed@100:1' does not have a release() function, it is
> > broken and must be fixed. 
> >  BUG: at drivers/base/core.c:104 device_release() 
> >   
> >  Call Trace:   
> >   [<ffffffff802ec380>] kobject_cleanup+0x53/0x7e 
> >   [<ffffffff802ec3ab>] kobject_release+0x0/0x9 
> >   [<ffffffff802ecf3f>] kref_put+0x74/0x81 
> >   [<ffffffff8035493b>] fixed_mdio_register_device+0x230/0x265 
> >   [<ffffffff80564d31>] fixed_init+0x1f/0x35 
> >   [<ffffffff802071a4>] init+0x147/0x2fb 
> >   [<ffffffff80223b6e>] schedule_tail+0x36/0x92 
> >   [<ffffffff8020a678>] child_rip+0xa/0x12 
> >   [<ffffffff80311714>] acpi_ds_init_one_object+0x0/0x83 
> >   [<ffffffff8020705d>] init+0x0/0x2fb 
> >   [<ffffffff8020a66e>] child_rip+0x0/0x12   
> >  
> >  
> > Also changed the notation of the fixed phy definition on 
> > mdio bus to the form of <speed>+<duplex> to make it able to be used
> > by gianfar and ucc_geth that define phy_id strictly as "%d:%d" and
> > cleaned up the whitespace issues.
> >  
> 
> Confused.  Does the above refer to the difference between this patch
> and the previous version, or does it just describe this patch?
> Hopefully the latter, because the former isn't interesting, long-term.
> 
Latter. IOW, that does mean, that mdio bus registered by this driver, now uses
same naming conventioun that other PHYLIB things use. Hereby it will make it able to be used in 
NIC drivers other than fs_enet (and gianfar and ucc_geth are now points of interest).

> If is _is_ a full standalone description of this patch then it's a
> bit hard to follow ;)
> 
Hmm -so what are my options - change the description and resubmit?
> > +config FIXED_MII_1000_FDX
> > +	bool "Emulation for 1000M Fdx fixed PHY behavior"
> > +	depends on FIXED_PHY
> > +
> > +config FIXED_MII_AMNT
> > +        int "Number of emulated PHYs to allocate "
> > +        depends on FIXED_PHY
> > +        default "1"
> > +        ---help---
> > +        Sometimes it is required to have several independent
> > emulated
> > +        PHYs on the bus (in case of multi-eth but phy-less HW for
> > instance).
> > +        This control will have specified number allocated for each
> > fixed
> > +        PHY type enabled.
> 
> Shouldn't these be runtime options (ie: module parameters)?
> 
I thought about it but this thing is more like the one that will never tend/required to change while\
configured.. Will add if you see it appropriate though.
> >
> > ...
> >
> > + *  Private information hoder for mii_bus
> 
> tpyo.
ok

-- 
Sincerely, Vitaly
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