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SubjectRe: [PATCH] SH/Dreamcast - fix regressions, whitespace and memory leaks in Maple Bus driver
On Mon, Feb 04, 2008 at 08:27:55AM +0000, Adrian McMenamin wrote:
>
> On Sun, 2008-02-03 at 21:29 -0800, Greg KH wrote:
> > On Sun, Feb 03, 2008 at 08:00:47PM +0000, Adrian McMenamin wrote:
> > > From: Adrian McMenamin
> > >
> > > This patch fixes the regression noted here:
> > > http://lkml.org/lkml/2008/1/26/189 as well as whitespace issues in the
> > > previous commit of this driver and the memory leaks noted here:
> > > http://lkml.org/lkml/2008/2/2/143 (as well as one or two other minor
> > > cleanups).
> >
> > Which portion of the patch fixes the kobject WARN_ON()?
>
>
>
> + if (mdev->registered == 0) {
> + retval = device_register(&mdev->dev);
> + if (retval) {
> + printk(KERN_INFO
> + "Maple bus: Attempt to register device"
> + " (%x, %x) failed.\n",
> + mdev->port, mdev->unit);
> + maple_free_dev(mdev);
> + mdev = NULL;
> + return;
> + }
> + mdev->registered = 1;
> + }
> }
>
>
> Specifically the check on mdev->registered

So the code path could cause devices to be registered more than once?
That seems broken, as no other bus that I know of needs such a check :(

Is there a way to fix the root problem here, instead of this type of
change?

thanks,

greg k-h


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