From: Chuck Lever chuck.lever@oracle.com
commit 9b06688bc3b9f13f8de90f832c455fddec3d4e8a upstream.
Clean up.
rb_lock critical sections added in rpcrdma_ep_post_extra_recv() should have first been converted to use normal spin_lock now that the reply handler is a work queue.
The backchannel set up code should use the appropriate helper instead of open-coding a rb_recv_bufs list add.
Problem introduced by glib patch re-ordering on my part.
Fixes: f531a5dbc451 ('xprtrdma: Pre-allocate backward rpc_rqst') Signed-off-by: Chuck Lever chuck.lever@oracle.com Tested-by: Devesh Sharma devesh.sharma@avagotech.com Signed-off-by: Anna Schumaker Anna.Schumaker@Netapp.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- net/sunrpc/xprtrdma/backchannel.c | 6 +----- net/sunrpc/xprtrdma/verbs.c | 7 +++---- 2 files changed, 4 insertions(+), 9 deletions(-)
--- a/net/sunrpc/xprtrdma/backchannel.c +++ b/net/sunrpc/xprtrdma/backchannel.c @@ -84,9 +84,7 @@ out_fail: static int rpcrdma_bc_setup_reps(struct rpcrdma_xprt *r_xprt, unsigned int count) { - struct rpcrdma_buffer *buffers = &r_xprt->rx_buf; struct rpcrdma_rep *rep; - unsigned long flags; int rc = 0;
while (count--) { @@ -98,9 +96,7 @@ static int rpcrdma_bc_setup_reps(struct break; }
- spin_lock_irqsave(&buffers->rb_lock, flags); - list_add(&rep->rr_list, &buffers->rb_recv_bufs); - spin_unlock_irqrestore(&buffers->rb_lock, flags); + rpcrdma_recv_buffer_put(rep); }
return rc; --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -1337,15 +1337,14 @@ rpcrdma_ep_post_extra_recv(struct rpcrdm struct rpcrdma_ia *ia = &r_xprt->rx_ia; struct rpcrdma_ep *ep = &r_xprt->rx_ep; struct rpcrdma_rep *rep; - unsigned long flags; int rc;
while (count--) { - spin_lock_irqsave(&buffers->rb_lock, flags); + spin_lock(&buffers->rb_lock); if (list_empty(&buffers->rb_recv_bufs)) goto out_reqbuf; rep = rpcrdma_buffer_get_rep_locked(buffers); - spin_unlock_irqrestore(&buffers->rb_lock, flags); + spin_unlock(&buffers->rb_lock);
rc = rpcrdma_ep_post_recv(ia, ep, rep); if (rc) @@ -1355,7 +1354,7 @@ rpcrdma_ep_post_extra_recv(struct rpcrdm return 0;
out_reqbuf: - spin_unlock_irqrestore(&buffers->rb_lock, flags); + spin_unlock(&buffers->rb_lock); pr_warn("%s: no extra receive buffers\n", __func__); return -ENOMEM;