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| author | Brian Norris <briannorris@chromium.org> | 2022-11-02 01:22:09 +0300 |
|---|---|---|
| committer | Tzung-Bi Shih <tzungbi@kernel.org> | 2022-11-02 07:28:47 +0300 |
| commit | 873ab3e886b52ba3d6ade3c5f3e6a0cff0c8cb12 (patch) | |
| tree | cb0041381d44c82f5b218aa9325109d7fe792f84 /drivers/platform/chrome/cros_ec_lightbar.c | |
| parent | 692a68ad7f3c568359b9f18d966628856fd34ff3 (diff) | |
| download | linux-873ab3e886b52ba3d6ade3c5f3e6a0cff0c8cb12.tar.xz | |
platform/chrome: cros_ec_lightbar: Set PROBE_PREFER_ASYNCHRONOUS
This driver takes on the order of 15ms to start on some systems. Even on
systems where there is no lightbar support, it can take a few
milliseconds just to probe the EC for support. It shouldn't have many
cross-device dependencies to race with, nor racy access to shared state
with other drivers, so this should be a relatively low risk change.
This driver was pinpointed as part of a survey of top slowest initcalls
(i.e., are built in, and probing synchronously) on a lab of ChromeOS
systems.
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://lore.kernel.org/r/20221101152132.v2.4.I565598102e0bfb03bdf8c090d3bfdf954d026bc5@changeid
Diffstat (limited to 'drivers/platform/chrome/cros_ec_lightbar.c')
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lightbar.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/platform/chrome/cros_ec_lightbar.c b/drivers/platform/chrome/cros_ec_lightbar.c index 58beb2a047b2..1674105decfb 100644 --- a/drivers/platform/chrome/cros_ec_lightbar.c +++ b/drivers/platform/chrome/cros_ec_lightbar.c @@ -602,6 +602,7 @@ static struct platform_driver cros_ec_lightbar_driver = { .driver = { .name = DRV_NAME, .pm = &cros_ec_lightbar_pm_ops, + .probe_type = PROBE_PREFER_ASYNCHRONOUS, }, .probe = cros_ec_lightbar_probe, .remove = cros_ec_lightbar_remove, |