SUNRPC: Fix "EPIPE" error on mount of rpcsec_gss-protected partitions

 gss_create_upcall() should not error just because rpc.gssd closed the
 pipe on its end. Instead, it should requeue the pending requests and then
 retry.

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index f44f46f1d8e0..8d782282ec19 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -638,7 +638,7 @@ gss_pipe_destroy_msg(struct rpc_pipe_msg *msg)
                                 gss_msg);
                 atomic_inc(&gss_msg->count);
                 gss_unhash_msg(gss_msg);
-                if (msg->errno == -ETIMEDOUT || msg->errno == -EPIPE) {
+                if (msg->errno == -ETIMEDOUT) {
                         unsigned long now = jiffies;
                         if (time_after(now, ratelimit)) {
                                 printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n"
@@ -786,7 +786,9 @@ gss_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int taskflags)
         cred->gc_flags = 0;
         cred->gc_base.cr_ops = &gss_credops;
         cred->gc_service = gss_auth->service;
-        err = gss_create_upcall(gss_auth, cred);
+        do {
+                err = gss_create_upcall(gss_auth, cred);
+        } while (err == -EAGAIN);
         if (err < 0)
                 goto out_err;