diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/caif/cfmuxl.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/net/caif/cfmuxl.c b/net/caif/cfmuxl.c index 5b17de51f64..c23979e79df 100644 --- a/net/caif/cfmuxl.c +++ b/net/caif/cfmuxl.c @@ -247,11 +247,25 @@ static void cfmuxl_ctrlcmd(struct cflayer *layr, enum caif_ctrlcmd ctrl, int phyid) { struct cfmuxl *muxl = container_obj(layr); - struct list_head *node, *next; struct cflayer *layer; - list_for_each_safe(node, next, &muxl->srvl_list) { - layer = list_entry(node, struct cflayer, node); - if (cfsrvl_phyid_match(layer, phyid)) + int idx; + + rcu_read_lock(); + list_for_each_entry_rcu(layer, &muxl->srvl_list, node) { + + if (cfsrvl_phyid_match(layer, phyid) && layer->ctrlcmd) { + + if ((ctrl == _CAIF_CTRLCMD_PHYIF_DOWN_IND || + ctrl == CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND) && + layer->id != 0) { + + idx = layer->id % UP_CACHE_SIZE; + spin_lock_bh(&muxl->receive_lock); + rcu_assign_pointer(muxl->up_cache[idx], NULL); + list_del_rcu(&layer->node); + spin_unlock_bh(&muxl->receive_lock); + } + /* NOTE: ctrlcmd is not allowed to block */ layer->ctrlcmd(layer, ctrl, phyid); } } |