linux-kernel - Re: [PATCH] HID: hiddev: fix returned errno code in hiddev

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Message-ID: <20150930100408.GA5576@sudip-pc>
Date:	Wed, 30 Sep 2015 15:34:09 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Luis de Bethencourt <luisbg@....samsung.com>
Cc:	linux-kernel@...r.kernel.org, jikos@...nel.org,
	linux-usb@...r.kernel.org, linux-input@...r.kernel.org
Subject: Re: [PATCH] HID: hiddev: fix returned errno code in hiddev_connect()

On Wed, Sep 30, 2015 at 10:56:26AM +0100, Luis de Bethencourt wrote:
> On 30/09/15 10:52, Luis de Bethencourt wrote:
> > The driver is using -1 instead of the -ENOMEM defined macro to specify
> > that a buffer allocation failed. Since the error number is propagated,
> > the caller will get a -EPERM which is the wrong error condition.
> > 
> > Also, the smatch tool complains with the following warning:
> > hiddev_connect() warn: returning -1 instead of -ENOMEM is sloppy
> > 
> > Signed-off-by: Luis de Bethencourt <luisbg@....samsung.com>
> > ---
> >  drivers/hid/usbhid/hiddev.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
> > index 2f1ddca..c5290ff 100644
> > --- a/drivers/hid/usbhid/hiddev.c
> > +++ b/drivers/hid/usbhid/hiddev.c
> > @@ -894,7 +894,7 @@ int hiddev_connect(struct hid_device *hid, unsigned int force)
> >  	}
> >  
> >  	if (!(hiddev = kzalloc(sizeof(struct hiddev), GFP_KERNEL)))
> > -		return -1;
> > +		return -ENOMEM;
> >  
> >  	init_waitqueue_head(&hiddev->wait);
> >  	INIT_LIST_HEAD(&hiddev->list);
> > 
> 
> Hello,
> 
> I got an "Undelivered Mail Returned to Sender" from Jiri Kosina's
> jikos@...nel.com email address. This email is listed multiple times
> in the MAINTAINERS file, does he have a new address to update this
> file?
Its jikos@...nel.org

regards
sudip
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