netdev - [PATCH net] Revert "net: core: maybe return -EEXIST in __dev_alloc

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Message-Id: <20171202074155.29146-1-johannes@sipsolutions.net>
Date:   Sat,  2 Dec 2017 08:41:55 +0100
From:   Johannes Berg <johannes@...solutions.net>
To:     netdev@...r.kernel.org
Cc:     Jouni Malinen <j@...fi>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Johannes Berg <johannes.berg@...el.com>
Subject: [PATCH net] Revert "net: core: maybe return -EEXIST in __dev_alloc_name"

From: Johannes Berg <johannes.berg@...el.com>

This reverts commit d6f295e9def0; some userspace (in the case
we noticed it's wpa_supplicant), is relying on the current
error code to determine that a fixed name interface already
exists.

Reported-by: Jouni Malinen <j@...fi>
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
---
 net/core/dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 07ed21d64f92..f47e96b62308 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1106,7 +1106,7 @@ static int __dev_alloc_name(struct net *net, const char *name, char *buf)
 	 * when the name is long and there isn't enough space left
 	 * for the digits, or if all bits are used.
 	 */
-	return p ? -ENFILE : -EEXIST;
+	return -ENFILE;
 }
 
 static int dev_alloc_name_ns(struct net *net,
-- 
2.14.2