On Wed, Jul 21, 2021 at 8:01 PM Johan Hovold <johan@xxxxxxxxxx> wrote:
>
> On Wed, Jul 21, 2021 at 07:33:04PM +0800, Dongliang Mu wrote:
> > The pairwise api invocation of tty_port_register_device should be
> > tty_port_unregister_device, other than tty_unregister_device.
>
> Are you sure about that? Please explain why you think this to be the
> case and why this change is needed.
I am sure about this.
1. From the implementation,
tty_port_register_device -> tty_port_register_device_attr ->
tty_port_link_device; tty_register_device_attr
tty_register_device -> tty_register_device_attr
tty_port_unregister_device -> serdev_tty_port_unregister;
tty_unregister_device
tty_unregister_device
As to the functionability, tty_port_register_device pairs with
tty_port_unregister_device; meanwhile, the same to tty_register_device
and tty_unregister_device.
2. From the function naming style,
tty_port_register_device - tty_port_unregister_device;
tty_register_device - tty_unregister_device
>
> > Fixes: a6afd9f3e819 ("tty: move a number of tty drivers from drivers/char/ to drivers/tty/")
>
> Please try a little harder, that's clearly not the commit that changed
> to the port registration helper.
>
> > Cc: stable@xxxxxxxxxxxxxxx
>
> Why do you think this is stable material? (hint: it is not)
>From the documentation, this label could make the patch automatically
go to stable tree. And stable tree is also using the incorrect api.
If I have any misunderstanding, please let me know.
>
> > Signed-off-by: Dongliang Mu <mudongliangabcd@xxxxxxxxx>
> > ---
> > drivers/tty/nozomi.c | 3 ++-
> > 1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c
> > index 0c80f25c8c3d..08bdd82f60b5 100644
> > --- a/drivers/tty/nozomi.c
> > +++ b/drivers/tty/nozomi.c
> > @@ -1417,7 +1417,8 @@ static int nozomi_card_init(struct pci_dev *pdev,
> >
> > err_free_tty:
> > for (i--; i >= 0; i--) {
> > - tty_unregister_device(ntty_driver, dc->index_start + i);
> > + tty_port_unregister_device(&dc->port[i].port, ntty_driver,
> > + dc->index_start + i);
> > tty_port_destroy(&dc->port[i].port);
> > }
> > free_irq(pdev->irq, dc);
>
> Johan
