diff options
| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2022-11-18 16:42:27 +0300 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2023-06-09 12:07:24 +0300 |
| commit | 4a420eb1426a237aaf105c9d040644785fc2c7fa (patch) | |
| tree | 81dfab4e0cea2bf30a87c46d30e313afb1bd5841 /drivers/thunderbolt/clx.c | |
| parent | 768e6fe69fde546beb942344c4c4932f3b3bb55b (diff) | |
| download | linux-4a420eb1426a237aaf105c9d040644785fc2c7fa.tar.xz | |
thunderbolt: Make tb_switch_clx_disable() return CL states that were enabled
This allows us to disable all CL states temporarily when running lane
margining and then return back the previously enabled states.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/clx.c')
| -rw-r--r-- | drivers/thunderbolt/clx.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/thunderbolt/clx.c b/drivers/thunderbolt/clx.c index 960409df4405..4f0cfbb24dd9 100644 --- a/drivers/thunderbolt/clx.c +++ b/drivers/thunderbolt/clx.c @@ -317,6 +317,9 @@ int tb_switch_clx_enable(struct tb_switch *sw, unsigned int clx) struct tb_port *up, *down; int ret; + if (!clx) + return 0; + if (!validate_mask(clx)) return -EINVAL; @@ -380,7 +383,8 @@ int tb_switch_clx_enable(struct tb_switch *sw, unsigned int clx) * Disables all CL states of the given router. Can be called on any * router and if the states were not enabled already does nothing. * - * Returns %0 on success or an error code on failure. + * Returns the CL states that were disabled or negative errno in case of + * failure. */ int tb_switch_clx_disable(struct tb_switch *sw) { @@ -408,5 +412,5 @@ int tb_switch_clx_disable(struct tb_switch *sw) sw->clx = 0; tb_sw_dbg(sw, "CLx: %s disabled\n", clx_name(clx)); - return 0; + return clx; } |