From 6734011f3c9a17070f157656f8b15e051e37aee1 Mon Sep 17 00:00:00 2001 From: Peter Senna Tschudin Date: Fri, 5 Oct 2012 11:33:04 +0000 Subject: [PATCH] drivers/net/irda/mcs7780.c: fix error return code The function mcs_probe() return 0 for success and negative value for most of its internal tests failures. There is one exception that is error case going to error2:. For this error case, the function abort its success execution path, but returns non negative value, making it difficult for a caller function to notice the error. This patch fixes the error case that do not return negative value. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // ( if@p1 (\(ret < 0\|ret != 0\)) { ... return ret; } | ret@p1 = 0 ) ... when != ret = e1 when != &ret *if(...) { ... when != ret = e2 when forall return ret; } // Signed-off-by: Peter Senna Tschudin Signed-off-by: David S. Miller --- drivers/net/irda/mcs7780.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/irda/mcs7780.c b/drivers/net/irda/mcs7780.c index 1a00b5990cb..f07c340990d 100644 --- a/drivers/net/irda/mcs7780.c +++ b/drivers/net/irda/mcs7780.c @@ -920,8 +920,10 @@ static int mcs_probe(struct usb_interface *intf, ndev->netdev_ops = &mcs_netdev_ops; - if (!intf->cur_altsetting) + if (!intf->cur_altsetting) { + ret = -ENOMEM; goto error2; + } ret = mcs_find_endpoints(mcs, intf->cur_altsetting->endpoint, intf->cur_altsetting->desc.bNumEndpoints); -- 2.46.0