Sometimes when polling for the port after target link width is changed
we get back port locked notification (because the link actually was
reset and then re-trained). Instead of bailing out we can ignore these
when polling for the width change as this is expected.
Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
---
drivers/thunderbolt/switch.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 525be2aa3ad9..561e1d77240e 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -1168,10 +1168,17 @@ int tb_port_wait_for_link_width(struct tb_port *port, int width,
do {
ret = tb_port_get_link_width(port);
- if (ret < 0)
- return ret;
- else if (ret == width)
+ if (ret < 0) {
+ /*
+ * Sometimes we get port locked error when
+ * polling the lanes so we can ignore it and
+ * retry.
+ */
+ if (ret != -EACCES)
+ return ret;
+ } else if (ret == width) {
return 0;
+ }
usleep_range(1000, 2000);
} while (ktime_before(ktime_get(), timeout));
--
2.35.1
