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| author | Mika Westerberg | 2017-09-14 12:59:10 +0200 |
|---|---|---|
| committer | Mika Westerberg | 2018-03-09 10:54:10 +0100 |
| commit | cb653eecde3dc37c67d3e7297ac5445d16f7be13 (patch) | |
| tree | d5fea156a7155e47b7d81466b4a1372da991349f /drivers/thunderbolt/icm.c | |
| parent | thunderbolt: Wait a bit longer for ICM to authenticate the active NVM (diff) | |
| download | kernel-qcow2-linux-cb653eecde3dc37c67d3e7297ac5445d16f7be13.tar.gz kernel-qcow2-linux-cb653eecde3dc37c67d3e7297ac5445d16f7be13.tar.xz kernel-qcow2-linux-cb653eecde3dc37c67d3e7297ac5445d16f7be13.zip | |
thunderbolt: Handle rejected Thunderbolt devices
The ICM firmware rejects devices if the maximum topology limit is
exceeded (more than 6 devices are connected). If that happens just log a
message to the kernel message buffer and bail out.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Diffstat (limited to 'drivers/thunderbolt/icm.c')
| -rw-r--r-- | drivers/thunderbolt/icm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/thunderbolt/icm.c b/drivers/thunderbolt/icm.c index 611d28e8e5f2..6d7f8262f864 100644 --- a/drivers/thunderbolt/icm.c +++ b/drivers/thunderbolt/icm.c @@ -410,6 +410,12 @@ icm_fr_device_connected(struct tb *tb, const struct icm_pkg_header *hdr) ICM_LINK_INFO_DEPTH_SHIFT; authorized = pkg->link_info & ICM_LINK_INFO_APPROVED; + if (pkg->link_info & ICM_LINK_INFO_REJECTED) { + tb_info(tb, "switch at %u.%u was rejected by ICM firmware because topology limit exceeded\n", + link, depth); + return; + } + ret = icm->get_route(tb, link, depth, &route); if (ret) { tb_err(tb, "failed to find route string for switch at %u.%u\n", |