[PATCH] xprtrdma: Wake up re_connect_wait on disconnect

From: Dan Aloni <dan@kernelim.com>
To: Chuck Lever <chuck.lever@oracle.com>
Cc: linux-rdma@vger.kernel.org, linux-nfs@vger.kernel.org
Subject: [PATCH] xprtrdma: Wake up re_connect_wait on disconnect
Date: Sat, 20 Jun 2020 20:18:05 +0300	[thread overview]
Message-ID: <20200620171805.1748399-1-dan@kernelim.com> (raw)

Given that rpcrdma_xprt_connect() happens from workqueue context, on cases where
connections don't succeeds, something needs to wake it up. In my case, this has
been observed when the CM callback received `RDMA_CM_EVENT_REJECTED`, and
`rpcrdma_xprt_connect()` slept forever.

This continues the fix in commit 58bd6656f808 ('xprtrdma: Restore wake-up-all to
rpcrdma_cm_event_handler()').

Signed-off-by: Dan Aloni <dan@kernelim.com>
CC: Chuck Lever <chuck.lever@oracle.com>
---

Notes:
    Hi Chuck,
    
    Maybe I missd something, as it is not clear to me how otherwise (without this
    patch), re_connect_wait can be woken up in this situation. Please explain?

 net/sunrpc/xprtrdma/verbs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 2ae348377806..8bd76a47a91f 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -289,6 +289,7 @@ rpcrdma_cm_event_handler(struct rdma_cm_id *id, struct rdma_cm_event *event)
 		ep->re_connect_status = -ECONNABORTED;
 disconnected:
 		xprt_force_disconnect(xprt);
+		wake_up_all(&ep->re_connect_wait);
 		return rpcrdma_ep_destroy(ep);
 	default:
 		break;
-- 
2.25.4

