Re: [PATCH] pcnet32 compilation fix for 2.4.3pre6

Jeff Garzik
2001-03-22T14:47:51Z

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Eli Carter wrote:
> The "!(addr[0]&1)" part of the test already catches the ff's case, so
> that is redundant.
> Using 6 bytes instead of 7 is an improvement.

oops. Thanks, updated patch attached. My patch also adds inline source
docs, and uses 'static inline' instead of 'static __inline__', two small
style improvements.
--
Jeff Garzik | May you have warm words on a cold evening,
Building 1024 | a full mooon on a dark night,
MandrakeSoft | and a smooth road all the way to your door.

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Index: include/linux/etherdevice.h
===================================================================
RCS file: /cvsroot/gkernel/linux_2_4/include/linux/etherdevice.h,v
retrieving revision 1.1.1.14.4.2
diff -u -r1.1.1.14.4.2 etherdevice.h
--- include/linux/etherdevice.h 2001/03/21 14:10:50 1.1.1.14.4.2
+++ include/linux/etherdevice.h 2001/03/22 14:44:51
@@ -46,6 +46,22 @@
memcpy (dest->data, src, len);
}

+/**
+ * is_valid_ether_addr - Determine if the given Ethernet address is valid
+ * @addr: Pointer to a six-byte array containing the Ethernet address
+ *
+ * Check that the Ethernet address (MAC) is not 00:00:00:00:00:00, is not
+ * a multicast address, and is not FF:FF:FF:FF:FF:FF.
+ *
+ * Return true if the address is valid.
+ */
+static inline int is_valid_ether_addr( u8 *addr )
+{
+ const char zaddr[6] = {0,};
+
+ return !(addr[0]&1) && memcmp( addr, zaddr, 6);
+}
+
#endif

#endif /* _LINUX_ETHERDEVICE_H */