From: Joerg Roedel <joro@8bytes.org>
To: Zdenek Kabelac <zdenek.kabelac@gmail.com>
Cc: olivier.grenie@dibcom.fr,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
jslaby@suse.cz
Subject: Re: WARNING: at lib/dma-debug.c:866 check_for_stack
Date: Fri, 14 May 2010 13:25:48 +0200 [thread overview]
Message-ID: <20100514112548.GD510@8bytes.org> (raw)
In-Reply-To: <AANLkTikyx2eaxaiUCFDSfpmn1UG0t2GOxArz6F4wp1LJ@mail.gmail.com>
On Fri, May 14, 2010 at 10:56:46AM +0200, Zdenek Kabelac wrote:
> I've noticed my dvb-t tuner reports this Warning about stack usage for DMA.
> Is there some fix already available ?
int dib0700_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props,
struct dvb_usb_device_description **desc, int *cold)
{
u8 b[16];
s16 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev,0),
REQUEST_GET_VERSION, USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, b, 16, USB_CTRL_GET_TIMEOUT);
...
}
The variable b is on the stack and used as the usb transfer buffer. This
should be easy to fix.
Joerg
prev parent reply other threads:[~2010-05-14 11:25 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-14 8:56 WARNING: at lib/dma-debug.c:866 check_for_stack Zdenek Kabelac
2010-05-14 11:25 ` Joerg Roedel [this message]
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