2013-08-05 03:18:36

by Alexey Khoroshilov

Subject: [PATCH] hostap: do not return positive number on failure path in prism2_open()

prism2_open() as an .ndo_open handler should not return positive numbers
in case of failure, but it does return 1 in a couple of places.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <[email protected]>
---
drivers/net/wireless/hostap/hostap_main.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/hostap/hostap_main.c b/drivers/net/wireless/hostap/hostap_main.c
index 15f0fad..e4f56ad 100644
--- a/drivers/net/wireless/hostap/hostap_main.c
+++ b/drivers/net/wireless/hostap/hostap_main.c
@@ -667,7 +667,7 @@ static int prism2_open(struct net_device *dev)
if (local->no_pri) {
printk(KERN_DEBUG "%s: could not set interface UP - no PRI "
"f/w\n", dev->name);
- return 1;
+ return -ENODEV;
}

if ((local->func->card_present && !local->func->card_present(local)) ||
@@ -682,7 +682,7 @@ static int prism2_open(struct net_device *dev)
printk(KERN_WARNING "%s: could not enable MAC port\n",
dev->name);
prism2_close(dev);
- return 1;
+ return -ENODEV;
}
if (!local->dev_enabled)
prism2_callback(local, PRISM2_CALLBACK_ENABLE);
--
1.8.1.2

2013-08-05 03:33:38

by Joe Perches

Subject: Re: [PATCH] hostap: do not return positive number on failure path in prism2_open()

On Mon, 2013-08-05 at 07:18 +0400, Alexey Khoroshilov wrote:
> prism2_open() as an .ndo_open handler should not return positive numbers
> in case of failure, but it does return 1 in a couple of places.
>
> Found by Linux Driver Verification project (linuxtesting.org).

How?

http://linuxtesting.org/project/ldv
http://linuxtesting.org/results/ldv

Shows defects and patches to fix them, but not any script
used to find it.

2013-08-05 04:01:10

by Alexey Khoroshilov

Subject: Re: [PATCH] hostap: do not return positive number on failure path in prism2_open()

On 08/05/2013 07:33 AM, Joe Perches wrote:
> On Mon, 2013-08-05 at 07:18 +0400, Alexey Khoroshilov wrote:
>> prism2_open() as an .ndo_open handler should not return positive numbers
>> in case of failure, but it does return 1 in a couple of places.
>>
>> Found by Linux Driver Verification project (linuxtesting.org).
> How?
>
> http://linuxtesting.org/project/ldv
> http://linuxtesting.org/results/ldv
>
> Shows defects and patches to fix them, but not any script
> used to find it.
There is a link to build instructions there:
http://forge.ispras.ru/projects/ldv/wiki/Downloading_and_Building_LDV

Currently it requires some efforts to install all the dependencies, the
simplest way is to use puppet script for Ubuntu 12.04 that you can find
in the repository.

--
Alexey