On Tue, May 26, 2009 at 02:32:45PM -0400, Michael Krufky wrote:
> On Tue, May 26, 2009 at 1:40 PM, Samuel Ortiz <sameo@xxxxxxxxxxxxxxx> wrote:
> > From: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx>
> > To: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxx>
> >
> > We're going to remove the FIRMWARE_NAME_MAX definition in order to avoid any
> > firmware name length restriction.
> > This patch changes the dvb_usb_device_properties firmware field accordingly.
> >
> > Signed-off-by: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx>
> >
> > ---
> > drivers/media/dvb/dvb-usb/dvb-usb.h | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > Index: iwm-2.6/drivers/media/dvb/dvb-usb/dvb-usb.h
> > ===================================================================
> > --- iwm-2.6.orig/drivers/media/dvb/dvb-usb/dvb-usb.h 2009-05-26 17:24:36.000000000 +0200
> > +++ iwm-2.6/drivers/media/dvb/dvb-usb/dvb-usb.h 2009-05-26 17:25:19.000000000 +0200
> > @@ -196,7 +196,7 @@ struct dvb_usb_device_properties {
> > #define CYPRESS_FX2 3
> > int usb_ctrl;
> > int (*download_firmware) (struct usb_device *, const struct firmware *);
> > - const char firmware[FIRMWARE_NAME_MAX];
> > + const char *firmware;
> > int no_reconnect;
> >
> > int size_of_priv;
> >
> > --
> > Intel Open Source Technology Centre
> > http://oss.intel.com/
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> >
>
> Samuel,
>
> Your patch makes the following change:
>
> - const char firmware[FIRMWARE_NAME_MAX];
> + const char *firmware;
>
> Before your change, struct dvb_usb_device_properties actually contains
> memory allocated for the firmware filename. After your change, this
> is nothing but a pointer.
>
> This will cause an OOPS.
No, not if it's correctly initialized, as it seems to be for all the
dvb_usb_device_properties users right now.
Typically, you'd initialize your dvb_usb_device_properties like this:
static struct dvb_usb_device_properties a800_properties = {
.caps = DVB_USB_IS_AN_I2C_ADAPTER,
.usb_ctrl = CYPRESS_FX2,
.firmware = "dvb-usb-avertv-a800-02.fw",
[...]
And that's fine.
Cheers,
Samuel.
--
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