diff options
Diffstat (limited to 'drivers/thunderbolt/switch.c')
| -rw-r--r-- | drivers/thunderbolt/switch.c | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index c6f30b1695a9..81f5164a6364 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -452,19 +452,26 @@ void tb_sw_set_unplugged(struct tb_switch *sw) int tb_switch_resume(struct tb_switch *sw) { int i, err; - u64 uid; tb_sw_info(sw, "resuming switch\n"); - err = tb_drom_read_uid_only(sw, &uid); - if (err) { - tb_sw_warn(sw, "uid read failed\n"); - return err; - } - if (sw != sw->tb->root_switch && sw->uid != uid) { - tb_sw_info(sw, - "changed while suspended (uid %#llx -> %#llx)\n", - sw->uid, uid); - return -ENODEV; + /* + * Check for UID of the connected switches except for root + * switch which we assume cannot be removed. + */ + if (tb_route(sw)) { + u64 uid; + + err = tb_drom_read_uid_only(sw, &uid); + if (err) { + tb_sw_warn(sw, "uid read failed\n"); + return err; + } + if (sw->uid != uid) { + tb_sw_info(sw, + "changed while suspended (uid %#llx -> %#llx)\n", + sw->uid, uid); + return -ENODEV; + } } /* upload configuration */ |