| Message ID | 20220901221857.2600340-2-michael@walle.cc (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | nvmem: core: introduce NVMEM layouts | expand |
On 9/1/22 15:18, Michael Walle wrote: > Add a helper to add an offset to a ethernet address. This comes in handy > if you have a base ethernet address for multiple interfaces. > > Signed-off-by: Michael Walle <michael@walle.cc> > Reviewed-by: Andrew Lunn <andrew@lunn.ch> > Acked-by: Jakub Kicinski <kuba@kernel.org> > --- > changes since v1: > - none > > include/linux/etherdevice.h | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h > index a541f0c4f146..f144cadbe99d 100644 > --- a/include/linux/etherdevice.h > +++ b/include/linux/etherdevice.h > @@ -507,6 +507,20 @@ static inline void eth_addr_inc(u8 *addr) > u64_to_ether_addr(u, addr); > } > > +/** > + * eth_addr_add() - Add (or subtract) and offset to/from the given MAC address. an offset ? > + * > + * @offset: Offset to add. > + * @addr: Pointer to a six-byte array containing Ethernet address to increment. > + */ > +static inline void eth_addr_add(u8 *addr, long offset) > +{ > + u64 u = ether_addr_to_u64(addr); > + > + u += offset; > + u64_to_ether_addr(u, addr); > +} > + > /** > * is_etherdev_addr - Tell if given Ethernet address belongs to the device. > * @dev: Pointer to a device structure
Am 2022-09-02 01:22, schrieb Randy Dunlap: >> +/** >> + * eth_addr_add() - Add (or subtract) and offset to/from the given >> MAC address. > > an offset > ? yes thanks, I'll change that in the next version. -michael
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index a541f0c4f146..f144cadbe99d 100644 --- a/include/linux/etherdevice.h +++ b/include/linux/etherdevice.h @@ -507,6 +507,20 @@ static inline void eth_addr_inc(u8 *addr) u64_to_ether_addr(u, addr); } +/** + * eth_addr_add() - Add (or subtract) and offset to/from the given MAC address. + * + * @offset: Offset to add. + * @addr: Pointer to a six-byte array containing Ethernet address to increment. + */ +static inline void eth_addr_add(u8 *addr, long offset) +{ + u64 u = ether_addr_to_u64(addr); + + u += offset; + u64_to_ether_addr(u, addr); +} + /** * is_etherdev_addr - Tell if given Ethernet address belongs to the device. * @dev: Pointer to a device structure