Several drivers use the same code as basis for filter hashes. Therefore
let's factor it out to a helper. This way drivers don't have to access
struct netdev_hw_addr internals.
Signed-off-by: Heiner Kallweit <hkallwe...@gmail.com>
---
include/linux/etherdevice.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index 8801f1f98..2e5debc03 100644
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -20,6 +20,7 @@
#include <linux/if_ether.h>
#include <linux/netdevice.h>
#include <linux/random.h>
+#include <linux/crc32.h>
#include <asm/unaligned.h>
#include <asm/bitsperlong.h>
@@ -265,6 +266,17 @@ static inline void eth_hw_addr_random(struct net_device
*dev)
eth_random_addr(dev->dev_addr);
}
+/**
+ * eth_hw_addr_crc - Calculate CRC from netdev_hw_addr
+ * @ha: pointer to hardware address
+ *
+ * Calculate CRC from a hardware address as basis for filter hashes.
+ */
+static inline u32 eth_hw_addr_crc(struct netdev_hw_addr *ha)
+{
+ return ether_crc(ETH_ALEN, ha->addr);
+}
+
/**
* ether_addr_copy - Copy an Ethernet address
* @dst: Pointer to a six-byte array Ethernet address destination
--
2.26.2
