[PATCH] coverity: sunrpc/xprt task null check

In __xprt_lock_write() we check to see if `task' is NULL, but in other places
we just go and dereference it.

`task' shouldn't be NULL anyway, so remove this test.

This defect was found automatically by Coverity Prevent, a static analysis
tool.

Signed-off-by: Zaur Kambarov <zkambarov@coverity.com>
Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

net/sunrpc/xprt.c

@@ -145,8 +145,6 @@ __xprt_lock_write(struct rpc_xprt *xprt, struct rpc_task *task)
 	if (test_and_set_bit(XPRT_LOCKED, &xprt->sockstate)) {
 		if (task == xprt->snd_task)
 			return 1;
-		if (task == NULL)
-			return 0;
 		goto out_sleep;
 	}
 	if (xprt->nocong || __xprt_get_cong(xprt, task)) {