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thunderbolt: Fix wake configurations after device unplug 

commit c38fa07dc6 upstream.

Currently we don't configure correctly the wake events after unplug of device
router. What can happen is that the downstream ports of host router will be
configured to wake on: USB4-wake and wake-on-disconnect, but not on
wake-on-connect. This may cause the later plugged device not to wake the
domain and fail in enumeration. Fix this by clearing downstream port's "USB4
Port is Configured" bit, after unplug of a device router.

Signed-off-by: Gil Fine <gil.fine@linux.intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gil Fine 2024-03-01 15:22:53 +02:00 committed by Greg Kroah-Hartman
parent e724f271ee
commit 63e86dc34e
1 changed files with 15 additions and 8 deletions
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23
drivers/thunderbolt/switch.c
View File

@ -3180,22 +3180,29 @@ void tb_switch_unconfigure_link(struct tb_switch *sw)
{
struct tb_port *up, *down;
if (sw->is_unplugged)
return;
if (!tb_route(sw) || tb_switch_is_icm(sw))
return;
/*
* Unconfigure downstream port so that wake-on-connect can be
* configured after router unplug. No need to unconfigure upstream port
* since its router is unplugged.
*/
up = tb_upstream_port(sw);
down = up->remote;
if (tb_switch_is_usb4(down->sw))
usb4_port_unconfigure(down);
else
tb_lc_unconfigure_port(down);
if (sw->is_unplugged)
return;
up = tb_upstream_port(sw);
if (tb_switch_is_usb4(up->sw))
usb4_port_unconfigure(up);
else
tb_lc_unconfigure_port(up);
down = up->remote;
if (tb_switch_is_usb4(down->sw))
usb4_port_unconfigure(down);
else
tb_lc_unconfigure_port(down);
}
static void tb_switch_credits_init(struct tb_switch *sw)