diff options
Diffstat (limited to 'drivers/thunderbolt/tb.c')
| -rw-r--r-- | drivers/thunderbolt/tb.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c index 2d360508aeeb..1d056ff6d77f 100644 --- a/drivers/thunderbolt/tb.c +++ b/drivers/thunderbolt/tb.c @@ -245,6 +245,16 @@ static int tb_enable_clx(struct tb_switch *sw) int ret; /* + * Currently only enable CLx for the first link. This is enough + * to allow the CPU to save energy at least on Intel hardware + * and makes it slightly simpler to implement. We may change + * this in the future to cover the whole topology if it turns + * out to be beneficial. + */ + if (sw->config.depth != 1) + return 0; + + /* * CL0s and CL1 are enabled and supported together. * Silently ignore CLx enabling in case CLx is not supported. */ |