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xprtrdma: Fix additional uses of spin_lock_irqsave(rb_lock) 

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: f531a5dbc4 ('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>
This commit is contained in:
Chuck Lever 2015-12-16 17:22:06 -05:00 committed by Anna Schumaker
parent abfb689711
commit 9b06688bc3
2 changed files with 4 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
net/sunrpc/xprtrdma/backchannel.c
View File

@ -84,9 +84,7 @@ static int rpcrdma_bc_setup_rqst(struct rpcrdma_xprt *r_xprt,
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 rpcrdma_xprt *r_xprt,
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;

7
net/sunrpc/xprtrdma/verbs.c
View File

@ -1338,15 +1338,14 @@ rpcrdma_ep_post_extra_recv(struct rpcrdma_xprt *r_xprt, unsigned int count)
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)
@ -1356,7 +1355,7 @@ rpcrdma_ep_post_extra_recv(struct rpcrdma_xprt *r_xprt, unsigned int count)
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;