lkml.org 
[lkml]   [2010]   [Oct]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/2] drivers/net/ax88796.c: Return error code in failure
Date
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>

---
Another call to platform_get_resource in the same function uses -ENXIO, so
I have used the same value here.

drivers/net/ax88796.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/net/ax88796.c b/drivers/net/ax88796.c
index 20e946b..b6da4cf 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;
}



\
 
 \ /
  Last update: 2010-10-18 16:07    [W:0.032 / U:0.596 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site