[PATCH for-next v2 5/6] RDMA/rxe: Remove unneeded pool->state

[Bob Pearson <rpearsonhpe@xxxxxxxxx>]

rxe_pool.c uses the field pool->state to mark a pool as invalid
when it is shut down and checks it in several pool APIs to verify
that the pool has not been shut dowm. This is unneeded because the
pools are not marked invalid unless the entire driver is being
removed at which point no functional APIs should or could be
executing. This patch removes this field and associated code.

Signed-off-by: Bob Pearson <rpearson@xxxxxxx>
---
 drivers/infiniband/sw/rxe/rxe_pool.c | 38 +---------------------------
 1 file changed, 1 insertion(+), 37 deletions(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_pool.c b/drivers/infiniband/sw/rxe/rxe_pool.c
index 09d8665c5343..7a03d49b263d 100644
--- a/drivers/infiniband/sw/rxe/rxe_pool.c
+++ b/drivers/infiniband/sw/rxe/rxe_pool.c
@@ -157,24 +157,16 @@ int rxe_pool_init(
 		pool->key.key_size = rxe_type_info[type].key_size;
 	}
 
-	pool->state = RXE_POOL_STATE_VALID;
-
 out:
 	return err;
 }
 
 void rxe_pool_cleanup(struct rxe_pool *pool)
 {
-	unsigned long flags;
-
-	write_lock_irqsave(&pool->pool_lock, flags);
-	pool->state = RXE_POOL_STATE_INVALID;
 	if (atomic_read(&pool->num_elem) > 0)
 		pr_warn("%s pool destroyed with unfree'd elem\n",
 			pool_name(pool));
-	write_unlock_irqrestore(&pool->pool_lock, flags);
 
-	pool->state = RXE_POOL_STATE_INVALID;
 	kfree(pool->index.table);
 }
 
@@ -328,9 +320,6 @@ void *rxe_alloc__(struct rxe_pool *pool)
 	struct rxe_pool_entry *elem;
 	u8 *obj;
 
-	if (pool->state != RXE_POOL_STATE_VALID)
-		return NULL;
-
 	if (atomic_inc_return(&pool->num_elem) > pool->max_elem)
 		goto out_cnt;
 
@@ -352,19 +341,10 @@ void *rxe_alloc__(struct rxe_pool *pool)
 
 void *rxe_alloc(struct rxe_pool *pool)
 {
-	unsigned long flags;
 	struct rxe_type_info *info = &rxe_type_info[pool->type];
 	struct rxe_pool_entry *elem;
 	u8 *obj;
 
-	read_lock_irqsave(&pool->pool_lock, flags);
-	if (pool->state != RXE_POOL_STATE_VALID) {
-		read_unlock_irqrestore(&pool->pool_lock, flags);
-		return NULL;
-	}
-
-	read_unlock_irqrestore(&pool->pool_lock, flags);
-
 	if (atomic_inc_return(&pool->num_elem) > pool->max_elem)
 		goto out_cnt;
 
@@ -386,15 +366,6 @@ void *rxe_alloc(struct rxe_pool *pool)
 
 int __rxe_add_to_pool(struct rxe_pool *pool, struct rxe_pool_entry *elem)
 {
-	unsigned long flags;
-
-	read_lock_irqsave(&pool->pool_lock, flags);
-	if (pool->state != RXE_POOL_STATE_VALID) {
-		read_unlock_irqrestore(&pool->pool_lock, flags);
-		return -EINVAL;
-	}
-	read_unlock_irqrestore(&pool->pool_lock, flags);
-
 	if (atomic_inc_return(&pool->num_elem) > pool->max_elem)
 		goto out_cnt;
 
@@ -437,9 +408,6 @@ void *rxe_pool_get_index(struct rxe_pool *pool, u32 index)
 
 	read_lock_irqsave(&pool->pool_lock, flags);
 
-	if (pool->state != RXE_POOL_STATE_VALID)
-		goto out;
-
 	node = pool->index.tree.rb_node;
 
 	while (node) {
@@ -460,8 +428,8 @@ void *rxe_pool_get_index(struct rxe_pool *pool, u32 index)
 		obj = NULL;
 	}
 
-out:
 	read_unlock_irqrestore(&pool->pool_lock, flags);
+
 	return obj;
 }
 
@@ -473,9 +441,6 @@ void *rxe_pool_get_key__(struct rxe_pool *pool, void *key)
 	u8 *obj = NULL;
 	int cmp;
 
-	if (pool->state != RXE_POOL_STATE_VALID)
-		goto out;
-
 	node = pool->key.tree.rb_node;
 
 	while (node) {
@@ -499,7 +464,6 @@ void *rxe_pool_get_key__(struct rxe_pool *pool, void *key)
 		obj = NULL;
 	}
 
-out:
 	return obj;
 }
 
-- 
2.27.0