mac80211: convert to idr_alloc()

Convert to the much saner new idr interface.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index d0dd111..1a8591b 100644 (file)
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -647,8 +647,6 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 
        spin_lock_init(&local->ack_status_lock);
        idr_init(&local->ack_status_frames);
-       /* preallocate at least one entry */
-       idr_pre_get(&local->ack_status_frames, GFP_KERNEL);
 
        sta_info_init(local);
 

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 5b9602b..de8548b 100644 (file)
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2017,24 +2017,14 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
                skb = skb_clone(skb, GFP_ATOMIC);
                if (skb) {
                        unsigned long flags;
-                       int id, r;
+                       int id;
 
                        spin_lock_irqsave(&local->ack_status_lock, flags);
-                       r = idr_get_new_above(&local->ack_status_frames,
-                                             orig_skb, 1, &id);
-                       if (r == -EAGAIN) {
-                               idr_pre_get(&local->ack_status_frames,
-                                           GFP_ATOMIC);
-                               r = idr_get_new_above(&local->ack_status_frames,
-                                                     orig_skb, 1, &id);
-                       }
-                       if (WARN_ON(!id) || id > 0xffff) {
-                               idr_remove(&local->ack_status_frames, id);
-                               r = -ERANGE;
-                       }
+                       id = idr_alloc(&local->ack_status_frames, orig_skb,
+                                      1, 0x10000, GFP_ATOMIC);
                        spin_unlock_irqrestore(&local->ack_status_lock, flags);
 
-                       if (!r) {
+                       if (id >= 0) {
                                info_id = id;
                                info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
                        } else if (skb_shared(skb)) {