From 13eea19213c1f4b711124ddc08c4bb9344442b64 Mon Sep 17 00:00:00 2001
From: Julia Lawall <julia@diku.dk>
Date: Mon, 18 Oct 2010 04:11:14 +0000
Subject: [PATCH] drivers/net/ax88796.c: Return error code in failure

In this code, 0 is returned on failure, even though other
failures return -ENOMEM or other similar values.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@a@
identifier alloc;
identifier ret;
constant C;
expression x;
@@

x = alloc(...);
if (x == NULL) { <+... \(ret = -C; \| return -C; \) ...+> }

@@
identifier f, a.alloc;
expression ret;
expression x,e1,e2,e3;
@@

ret = 0
... when != ret = e1
*x = alloc(...)
... when != ret = e2
if (x == NULL) { ... when != ret = e3
  return ret;
}
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ax88796.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ax88796.c b/drivers/net/ax88796.c
index 20e946b1e74..b6da4cf3694 100644
--- a/drivers/net/ax88796.c
+++ b/drivers/net/ax88796.c
@@ -864,6 +864,7 @@ static int ax_probe(struct platform_device *pdev)
 	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 	if (res == NULL) {
 		dev_err(&pdev->dev, "no IRQ specified\n");
+		ret = -ENXIO;
 		goto exit_mem;
 	}
 
-- 
2.11.4.GIT