net: ethtool: Add macro to clear a link mode setting

tlendacky · davem330 · commit 606c07f30860 · 2017-08-18T16:30:17.000-07:00
There are currently macros to set and test an ETHTOOL_LINK_MODE_ setting,
but not to clear one. Add a macro to clear an ETHTOOL_LINK_MODE_ setting.

Signed-off-by: Tom Lendacky &lt;thomas.lendacky@amd.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
@@ -136,6 +136,17 @@ struct ethtool_link_ksettings {
 #define ethtool_link_ksettings_add_link_mode(ptr, name, mode)		\
 	__set_bit(ETHTOOL_LINK_MODE_ ## mode ## _BIT, (ptr)->link_modes.name)
 
+/**
+ * ethtool_link_ksettings_del_link_mode - clear bit in link_ksettings
+ * link mode mask
+ *   @ptr : pointer to struct ethtool_link_ksettings
+ *   @name : one of supported/advertising/lp_advertising
+ *   @mode : one of the ETHTOOL_LINK_MODE_*_BIT
+ * (not atomic, no bound checking)
+ */
+#define ethtool_link_ksettings_del_link_mode(ptr, name, mode)		\
+	__clear_bit(ETHTOOL_LINK_MODE_ ## mode ## _BIT, (ptr)->link_modes.name)
+
 /**
  * ethtool_link_ksettings_test_link_mode - test bit in ksettings link mode mask
  *   @ptr : pointer to struct ethtool_link_ksettings
