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xprtrdma: buf_free not called for CB replies 

Since commit 5a6d1db455 ("SUNRPC: Add a transport-specific private
field in rpc_rqst"), the rpc_rqst's for RPC-over-RDMA backchannel
operations leave rq_buffer set to NULL.

xprt_release does not invoke ->op->buf_free when rq_buffer is NULL.
The RPCRDMA_REQ_F_BACKCHANNEL check in xprt_rdma_free is therefore
redundant because xprt_rdma_free is not invoked for backchannel
requests.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2017-12-14 20:57:23 -05:00 committed by Anna Schumaker
parent a2b6470b1c
commit 6c537f2c7c
3 changed files with 1 additions and 6 deletions
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1
net/sunrpc/xprtrdma/backchannel.c
View File

@ -43,7 +43,6 @@ static int rpcrdma_bc_setup_rqst(struct rpcrdma_xprt *r_xprt,
req = rpcrdma_create_req(r_xprt);
if (IS_ERR(req))
return PTR_ERR(req);
__set_bit(RPCRDMA_REQ_F_BACKCHANNEL, &req->rl_flags);
rb = rpcrdma_alloc_regbuf(RPCRDMA_HDRBUF_SIZE,
DMA_TO_DEVICE, GFP_KERNEL);

3
net/sunrpc/xprtrdma/transport.c
View File

@ -686,9 +686,6 @@ xprt_rdma_free(struct rpc_task *task)
struct rpcrdma_xprt *r_xprt = rpcx_to_rdmax(rqst->rq_xprt);
struct rpcrdma_req *req = rpcr_to_rdmar(rqst);
if (test_bit(RPCRDMA_REQ_F_BACKCHANNEL, &req->rl_flags))
return;
dprintk("RPC: %s: called on 0x%p\n", __func__, req->rl_reply);
if (test_bit(RPCRDMA_REQ_F_PENDING, &req->rl_flags))

3
net/sunrpc/xprtrdma/xprt_rdma.h
View File

@ -354,8 +354,7 @@ struct rpcrdma_req {
/* rl_flags */
enum {
RPCRDMA_REQ_F_BACKCHANNEL = 0,
RPCRDMA_REQ_F_PENDING,
RPCRDMA_REQ_F_PENDING = 0,
RPCRDMA_REQ_F_TX_RESOURCES,
};