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[10/19] thunderbolt: Do not change default USB4 router notification timeout

Message ID 20200819115905.59834-11-mika.westerberg@linux.intel.com
State New
Headers show
Series thunderbolt: Power Management improvements | expand

Commit Message

Mika Westerberg Aug. 19, 2020, 11:58 a.m. UTC 
Some early stage USB4 devices do not like that any of the enumerating
router config space fields (ROUTER_CS_1 - ROUTER_CS_4) are written after
the initial enumeration for example when entering sleep states. The
default timeout by the USB4 spec is 10 ms which should be fine for the
driver to handle.

For this reason do not change the notification timeout from the default
10 ms for USB4 routers.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
---
 drivers/thunderbolt/switch.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)
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Patch

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index de186d6ed166..e1ba8215144b 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -1269,7 +1269,7 @@  static int tb_plug_events_active(struct tb_switch *sw, bool active)
 	u32 data;
 	int res;
 
-	if (tb_switch_is_icm(sw))
+	if (tb_switch_is_icm(sw) || tb_switch_is_usb4(sw))
 		return 0;
 
 	sw->config.plug_events_delay = 0xff;
@@ -1277,10 +1277,6 @@  static int tb_plug_events_active(struct tb_switch *sw, bool active)
 	if (res)
 		return res;
 
-	/* Plug events are always enabled in USB4 */
-	if (tb_switch_is_usb4(sw))
-		return 0;
-
 	res = tb_sw_read(sw, &data, TB_CFG_SWITCH, sw->cap_plug_events + 1, 1);
 	if (res)
 		return res;