From: Trond Myklebust <trond.myklebust@hammerspace.com>
Date: Thu, 7 Apr 2022 09:50:19 -0400
Subject: [PATCH] SUNRPC: Handle low memory situations in call_status()
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Git-commit: 9d82819d5b065348ce623f196bf601028e22ed00
Patch-mainline: v5.18
References: git-fixes

We need to handle ENFILE, ENOBUFS, and ENOMEM, because
xprt_wake_pending_tasks() can be called with any one of these due to
socket creation failures.

Fixes: b61d59fffd3e ("SUNRPC: xs_tcp_connect_worker{4,6}: merge common code")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Acked-by: NeilBrown <neilb@suse.com>

---
 net/sunrpc/clnt.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -2245,7 +2245,10 @@ call_status(struct rpc_task *task)
 		task->tk_action = call_bind;
 		break;
 	case -ENOBUFS:
+	case -ENFILE:
+	case -ENOMEM:
 		rpc_delay(task, HZ>>2);
+		break;
 	case -EAGAIN:
 		task->tk_action = call_transmit;
 		break;