wifi: mac80211: clean up assignments to pointer cache.

[ Upstream commit ba4b1fa3128b2fbf14e167230315cbd9074b629b ]

The assignment to pointer cache in function mesh_fast_tx_gc can
be made at the declaration time rather than a later assignment.
There are also 3 functions where pointer cache is being initialized
at declaration time and later re-assigned again with the same
value, these are redundant and can be removed.

Cleans up code and three clang scan build warnings:
warning: Value stored to 'cache' during its initialization is never
read [deadcode.DeadStores]

Signed-off-by: Colin Ian King <colin.i.king@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://msgid.link/20240215232151.2075483-1-colin.i.king@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Stable-dep-of: 8c75cdcdf869 ("wifi: mac80211: split mesh fast tx cache into local/proxied/forwarded")
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
index 3e52aaa57b1fc419ccc30d1852186d48d34a7659..c7173190f9b935a5362767fdc3c1574dc6513df1 100644 (file)
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -595,11 +595,10 @@ unlock_sta:
 void mesh_fast_tx_gc(struct ieee80211_sub_if_data *sdata)
 {
        unsigned long timeout = msecs_to_jiffies(MESH_FAST_TX_CACHE_TIMEOUT);
-       struct mesh_tx_cache *cache;
+       struct mesh_tx_cache *cache = &sdata->u.mesh.tx_cache;
        struct ieee80211_mesh_fast_tx *entry;
        struct hlist_node *n;
 
-       cache = &sdata->u.mesh.tx_cache;
        if (atomic_read(&cache->rht.nelems) < MESH_FAST_TX_CACHE_THRESHOLD_SIZE)
                return;
 
@@ -617,7 +616,6 @@ void mesh_fast_tx_flush_mpath(struct mesh_path *mpath)
        struct ieee80211_mesh_fast_tx *entry;
        struct hlist_node *n;
 
-       cache = &sdata->u.mesh.tx_cache;
        spin_lock_bh(&cache->walk_lock);
        hlist_for_each_entry_safe(entry, n, &cache->walk_head, walk_list)
                if (entry->mpath == mpath)
@@ -632,7 +630,6 @@ void mesh_fast_tx_flush_sta(struct ieee80211_sub_if_data *sdata,
        struct ieee80211_mesh_fast_tx *entry;
        struct hlist_node *n;
 
-       cache = &sdata->u.mesh.tx_cache;
        spin_lock_bh(&cache->walk_lock);
        hlist_for_each_entry_safe(entry, n, &cache->walk_head, walk_list)
                if (rcu_access_pointer(entry->mpath->next_hop) == sta)
@@ -646,7 +643,6 @@ void mesh_fast_tx_flush_addr(struct ieee80211_sub_if_data *sdata,
        struct mesh_tx_cache *cache = &sdata->u.mesh.tx_cache;
        struct ieee80211_mesh_fast_tx *entry;
 
-       cache = &sdata->u.mesh.tx_cache;
        spin_lock_bh(&cache->walk_lock);
        entry = rhashtable_lookup_fast(&cache->rht, addr, fast_tx_rht_params);
        if (entry)