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From: Greg KH on 30 Mar 2010 19:50
2.6.33-stable review patch. If anyone has any objections, please let us know.

------------------

From: J. Bruce Fields <bfields(a)citi.umich.edu>

commit 1b644b6e6f6160ae35ce4b52c2ca89ed3e356e18 upstream.

This reverts commit b0401d725334a94d57335790b8ac2404144748ee, which
moved svc_delete_xprt() outside of XPT_BUSY, and allowed it to be called
after svc_xpt_recived(), removing its last reference and destroying it
after it had already been queued for future processing.

Signed-off-by: J. Bruce Fields <bfields(a)citi.umich.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de>

---
net/sunrpc/svc_xprt.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)

--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -699,7 +699,10 @@ int svc_recv(struct svc_rqst *rqstp, lon
spin_unlock_bh(&pool->sp_lock);

len = 0;
- if (test_bit(XPT_LISTENER, &xprt->xpt_flags)) {
+ if (test_bit(XPT_CLOSE, &xprt->xpt_flags)) {
+ dprintk("svc_recv: found XPT_CLOSE\n");
+ svc_delete_xprt(xprt);
+ } else if (test_bit(XPT_LISTENER, &xprt->xpt_flags)) {
struct svc_xprt *newxpt;
newxpt = xprt->xpt_ops->xpo_accept(xprt);
if (newxpt) {
@@ -725,7 +728,7 @@ int svc_recv(struct svc_rqst *rqstp, lon
svc_xprt_received(newxpt);
}
svc_xprt_received(xprt);
- } else if (!test_bit(XPT_CLOSE, &xprt->xpt_flags)) {
+ } else {
dprintk("svc: server %p, pool %u, transport %p, inuse=%d\n",
rqstp, pool->sp_id, xprt,
atomic_read(&xprt->xpt_ref.refcount));
@@ -738,11 +741,6 @@ int svc_recv(struct svc_rqst *rqstp, lon
dprintk("svc: got len=%d\n", len);
}

- if (test_bit(XPT_CLOSE, &xprt->xpt_flags)) {
- dprintk("svc_recv: found XPT_CLOSE\n");
- svc_delete_xprt(xprt);
- }
-
/* No data, incomplete (TCP) read, or accept() */
if (len == 0 || len == -EAGAIN) {
rqstp->rq_res.len = 0;


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