diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index f4b136504e96..be74ff8f7873 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -79,7 +79,6 @@ static void rpcrdma_reqs_reset(struct rpcrdma_xprt *r_xprt); static void rpcrdma_reps_destroy(struct rpcrdma_buffer *buf); static void rpcrdma_mrs_create(struct rpcrdma_xprt *r_xprt); static void rpcrdma_mrs_destroy(struct rpcrdma_buffer *buf); -static void rpcrdma_mr_free(struct rpcrdma_mr *mr); static struct rpcrdma_regbuf * rpcrdma_regbuf_alloc(size_t size, enum dma_data_direction direction, gfp_t flags); @@ -967,7 +966,7 @@ rpcrdma_mrs_create(struct rpcrdma_xprt *r_xprt) mr->mr_xprt = r_xprt; spin_lock(&buf->rb_lock); - list_add(&mr->mr_list, &buf->rb_mrs); + rpcrdma_mr_push(mr, &buf->rb_mrs); list_add(&mr->mr_all, &buf->rb_all_mrs); spin_unlock(&buf->rb_lock); } @@ -1185,10 +1184,19 @@ out: */ void rpcrdma_req_destroy(struct rpcrdma_req *req) { + struct rpcrdma_mr *mr; + list_del(&req->rl_all); - while (!list_empty(&req->rl_free_mrs)) - rpcrdma_mr_free(rpcrdma_mr_pop(&req->rl_free_mrs)); + while ((mr = rpcrdma_mr_pop(&req->rl_free_mrs))) { + struct rpcrdma_buffer *buf = &mr->mr_xprt->rx_buf; + + spin_lock(&buf->rb_lock); + list_del(&mr->mr_all); + spin_unlock(&buf->rb_lock); + + frwr_release_mr(mr); + } rpcrdma_regbuf_free(req->rl_recvbuf); rpcrdma_regbuf_free(req->rl_sendbuf); @@ -1196,24 +1204,28 @@ void rpcrdma_req_destroy(struct rpcrdma_req *req) kfree(req); } -static void -rpcrdma_mrs_destroy(struct rpcrdma_buffer *buf) +/** + * rpcrdma_mrs_destroy - Release all of a transport's MRs + * @buf: controlling buffer instance + * + * Relies on caller holding the transport send lock to protect + * removing mr->mr_list from req->rl_free_mrs safely. + */ +static void rpcrdma_mrs_destroy(struct rpcrdma_buffer *buf) { struct rpcrdma_xprt *r_xprt = container_of(buf, struct rpcrdma_xprt, rx_buf); struct rpcrdma_mr *mr; - unsigned int count; - count = 0; spin_lock(&buf->rb_lock); while ((mr = list_first_entry_or_null(&buf->rb_all_mrs, struct rpcrdma_mr, mr_all)) != NULL) { + list_del(&mr->mr_list); list_del(&mr->mr_all); spin_unlock(&buf->rb_lock); frwr_release_mr(mr); - count++; spin_lock(&buf->rb_lock); } spin_unlock(&buf->rb_lock); @@ -1286,17 +1298,6 @@ void rpcrdma_mr_put(struct rpcrdma_mr *mr) rpcrdma_mr_push(mr, &mr->mr_req->rl_free_mrs); } -static void rpcrdma_mr_free(struct rpcrdma_mr *mr) -{ - struct rpcrdma_xprt *r_xprt = mr->mr_xprt; - struct rpcrdma_buffer *buf = &r_xprt->rx_buf; - - mr->mr_req = NULL; - spin_lock(&buf->rb_lock); - rpcrdma_mr_push(mr, &buf->rb_mrs); - spin_unlock(&buf->rb_lock); -} - /** * rpcrdma_buffer_get - Get a request buffer * @buffers: Buffer pool from which to obtain a buffer