Re: [PATCH] usb-serial regression fix

From: Mark Lord
Date: Tue Mar 13 2007 - 09:56:01 EST


Jim Radford wrote:
On Mon, Mar 12, 2007 at 09:55:14PM -0400, Mark Lord wrote:

So where does the memory get freed -- the structure pointed at
by the serial->port[i] thingie ? It's not a leak, is it?

It gets free'd through device_unregister

for (i = 0; i < num_ports; ++i) {
...
port->dev.release = &port_release;
...
retval = device_register(&port->dev);

which means that until all the drivers get converted to use
->port_probe() and ->port_remove() (which gets called by
device_unregister) and stop using the ->port[] array in ->shutdown()
we need to have ->shutdown() called before device_unregister.

Look at changeset d9a7ecacac5f8274d2afce09aadcf37bdb42b93a in Linus's
tree from Jim Radford:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d9a7ecacac5f8274d2afce09aadcf37bdb42b93a

So, this patch should be reverted for now.

Okay, so.. Jim, could you spell it out for us now?

I'm confused.

Based on the current 2.6.21-rc3-git*,
tell us *exactly* what (if any) needs to be reverted,
and *exactly* which (if any) of my suggested patches to apply ?

Thanks
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