1 files changed, 4 insertions, 2 deletions

diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index 2c6a1ece54bf..29b4ba93ab3c 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -1317,10 +1317,12 @@ static inline bool gssp_ready(struct sunrpc_net *sn)
         return false;
 }
 
-static int wait_for_gss_proxy(struct net *net)
+static int wait_for_gss_proxy(struct net *net, struct file *file)
 {
         struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
 
+        if (file->f_flags & O_NONBLOCK && !gssp_ready(sn))
+                return -EAGAIN;
         return wait_event_interruptible(sn->gssp_wq, gssp_ready(sn));
 }
 
@@ -1362,7 +1364,7 @@ static ssize_t read_gssp(struct file *file, char __user *buf,
         size_t len;
         int ret;
 
-        ret = wait_for_gss_proxy(net);
+        ret = wait_for_gss_proxy(net, file);
         if (ret)
                 return ret;