ib_srpt: Make srpt_alloc_ioctx_ring() return NULL instead of a dangling

pointer if allocation fails. Reported by Dan Carpenter
<dan.carpenter@oracle.com> on the linux-rdma@vger.kernel.org mailing list.


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@3907 d57e44dd-8a1f-0410-8b47-8ef2f437770f

srpt/src/ib_srpt.c

@@ -823,6 +823,7 @@ err:
 	while (--i >= 0)
 		srpt_free_ioctx(sdev, ring[i], dma_size, dir);
 	kfree(ring);
+	ring = NULL;
 out:
 	TRACE_EXIT_HRES(ring);
 	return ring;