cfg80211: add wiphy_idx_valid to check for wiphy_idx sanity
This will later be used by others, for now make use of it in
cfg80211_drv_by_wiphy_idx() to return early if an invalid
wiphy_idx has been provided.
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 1783781..4f2e0fe 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -63,6 +63,13 @@
return container_of(wiphy, struct cfg80211_registered_device, wiphy);
}
+/* Note 0 is valid, hence phy0 */
+static inline
+bool wiphy_idx_valid(int wiphy_idx)
+{
+ return (wiphy_idx >= 0);
+}
+
extern struct mutex cfg80211_drv_mutex;
extern struct list_head cfg80211_drv_list;