[U-Boot] [PATCH v4 1/3] net: Adds Fast Ethernet Controller driver for Armada100

[Ajay Bhargav <ajay.bhargav@einfochips.com>]

----- "Ajay Bhargav" <ajay.bhargav@einfochips.com> wrote:

> ----- "Mike Frysinger" <vapier@gentoo.org> wrote:
> 
> > On Tuesday, August 30, 2011 01:44:40 Ajay Bhargav wrote:
> > > +static void update_hash_table_mac_address(struct armdfec_device
> > *darmdfec,
> > > +					  u8 *oaddr, u8 *addr)
> > > +{
> > > +	u32 mach;
> > > +	u32 macl;
> > > +
> > > +	/* Delete old entry */
> > > +	if (oaddr) {
> > > +		mach = (oaddr[0] << 8) | oaddr[1];
> > > +		macl = (oaddr[2] << 24) | (oaddr[3] << 16) |
> > > +			(oaddr[4] << 8) | oaddr[5];
> > > +		add_del_hash_entry(darmdfec, mach, macl, 1, 0, HASH_DELETE);
> > > +	}
> > > +
> > > +	/* Add new entry */
> > > +	mach = (addr[0] << 8) | addr[1];
> > > +	macl = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) |
> > addr[5];
> > > +	add_del_hash_entry(darmdfec, mach, macl, 1, 0, HASH_ADD);
> > > +}
> > > ...
> > > +static int armdfec_init(struct eth_device *dev, bd_t *bd)
> > > +{
> > > ...
> > > +	update_hash_table_mac_address(darmdfec, dev->enetaddr,
> > dev->enetaddr);
> >
> > i think something got lost along the way here :)
> >
> > you'll probably want to have oaddr[] be a static local in
> > update_hash_table_mac_address and use that to delete the old one
> when
> > it
> > differs from the new one, and then copy the new one into the static
> > local.
> > -mike
> 
> You can have multiple entries in Hash table for different MAC
> addresses.
> The reason old entry is deleted because it may be possible that hash
> entry
> in the list is skipped but not invalidated so the same entry is made
> valid
> in the list after removing the old one and updating list with new
> entry.
> The calculated has for a particular MAC address is going to be same.
> 
> Thanks,
> Ajay Bhargav

Adding to this.. In my case, its the first entry in hash table so I do not need to delete it, I can simply pass NULL in place of oaddr. That change I will make in the updated patch I am going to submit.

Thanks,
Ajay Bhargav