SUNRPC: remove BUG_ONs checking RPCSVC_MAXPAGES

Replace two bounds checking BUG_ON() calls with WARN_ON_ONCE() and resetting
the requested size to RPCSVC_MAXPAGES.

Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

2 files changed, 7 insertions, 2 deletions

diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 664979bee1d2..3bf5a54982ba 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -587,7 +587,9 @@ svc_init_buffer(struct svc_rqst *rqstp, unsigned int size, int node)
                                        * We assume one is at most one page
                                        */
         arghi = 0;
-        BUG_ON(pages > RPCSVC_MAXPAGES);
+        WARN_ON_ONCE(pages > RPCSVC_MAXPAGES);
+        if (pages > RPCSVC_MAXPAGES)
+                pages = RPCSVC_MAXPAGES;
         while (pages) {
                 struct page *p = alloc_pages_node(node, GFP_KERNEL, 0);
                 if (!p)
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index be89bb67f0ae..35fa74b09f77 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -579,7 +579,10 @@ int svc_alloc_arg(struct svc_rqst *rqstp)
 
         /* now allocate needed pages.  If we get a failure, sleep briefly */
         pages = (serv->sv_max_mesg + PAGE_SIZE) / PAGE_SIZE;
-        BUG_ON(pages >= RPCSVC_MAXPAGES);
+        WARN_ON_ONCE(pages >= RPCSVC_MAXPAGES);
+        if (pages >= RPCSVC_MAXPAGES)
+                /* use as many pages as possible */
+                pages = RPCSVC_MAXPAGES - 1;
         for (i = 0; i < pages ; i++)
                 while (rqstp->rq_pages[i] == NULL) {
                         struct page *p = alloc_page(GFP_KERNEL);