From: Chuck Lever <chuck.lever@oracle.com>
Date: Sun, 9 Nov 2014 01:14:12 +0000 (-0500)
Subject: xprtrdma: Return an errno from rpcrdma_register_external()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=92b98361f119a6919061d067c6584de9ae2de9f4;p=linux-beck.git

xprtrdma: Return an errno from rpcrdma_register_external()

The RPC/RDMA send_request method and the chunk registration code
expects an errno from the registration function. This allows
the upper layers to distinguish between a recoverable failure
(for example, temporary memory exhaustion) and a hard failure
(for example, a bug in the registration logic).

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
---

diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 61c41298b4ea..6ea29420f0ac 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -1918,10 +1918,10 @@ rpcrdma_register_external(struct rpcrdma_mr_seg *seg,
 		break;
 
 	default:
-		return -1;
+		return -EIO;
 	}
 	if (rc)
-		return -1;
+		return rc;
 
 	return nsegs;
 }