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thunderbolt: Ignore port locked error in tb_port_wait_for_link_width()

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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@linux.intel.com>
This commit is contained in:
Mika Westerberg
2022-02-13 17:16:24 +02:00
parent 0e14dd5e14
commit 0a2e1667a7
1 changed files with 10 additions and 3 deletions
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13
drivers/thunderbolt/switch.c
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@@ -1168,10 +1168,17 @@ int tb_port_wait_for_link_width(struct tb_port *port, int width,
do { do {
ret = tb_port_get_link_width(port); ret = tb_port_get_link_width(port);
if (ret < 0) if (ret < 0) {
return ret; /*
else if (ret == width) * 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; return 0;
}
usleep_range(1000, 2000); usleep_range(1000, 2000);
} while (ktime_before(ktime_get(), timeout)); } while (ktime_before(ktime_get(), timeout));