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thunderbolt: Reset only non-USB4 host routers in resume 

commit 8cf9926c53 upstream.

There is no need to reset the USB4 host routers on resume because they
are reset already and this may cause problems if the link does not come
up soon enough. For this reason limit this to happen in non-USB4 host
routers only (that's Apple systems with Intel Thunderbolt controllers).

Fixes: 59a54c5f3d ("thunderbolt: Reset topology created by the boot firmware")
Cc: Sanath S <Sanath.S@amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mika Westerberg 2024-01-31 11:12:59 +02:00 committed by Greg Kroah-Hartman
parent b45259d419
commit 2e7b443ef6
1 changed files with 6 additions and 2 deletions
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8
drivers/thunderbolt/tb.c
View File

@ -2763,8 +2763,12 @@ static int tb_resume_noirq(struct tb *tb)
tb_dbg(tb, "resuming...\n");
/* remove any pci devices the firmware might have setup */
tb_switch_reset(tb->root_switch);
/*
* For non-USB4 hosts (Apple systems) remove any PCIe devices
* the firmware might have setup.
*/
if (!tb_switch_is_usb4(tb->root_switch))
tb_switch_reset(tb->root_switch);
tb_switch_resume(tb->root_switch, false);
tb_free_invalid_tunnels(tb);