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| author | Dmitry Torokhov <[email protected]> | 2022-05-18 15:02:51 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2022-05-19 18:11:25 +0200 |
| commit | 69a1c9a9b273271f2a2674bcc117336a9bb0a4b4 (patch) | |
| tree | 64a8e003f4b1a3811528e68f965d9c84f7a1ec73 /tools/perf/scripts/python/bin/stackcollapse-report | |
| parent | 26ae2c942b5702f2e43d36b2a4389cfb7d616b6a (diff) | |
usb: Probe EHCI, OHCI controllers asynchronously
initcall_debug shows that OHCI controllers take ~60ms to probe on
Rockchip RK3399 systems:
probe of fe3a0000.usb returned 1 after 58941 usecs
A few of these can add up to waste non-trivial amounts of time at boot.
These host controllers don't provide resources to other drivers, so
this shouldn't contribute to exposing race conditions.
Chrome OS kernels have carried this patch on some systems for a while
without issues. Similar patches have been merged for a variety of (e)MMC
host controllers for similar reasons.
[Brian: rewrote commit message, refreshed, but retained dtor's original
authorship ]
Acked-by: Alan Stern <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>
Signed-off-by: Brian Norris <[email protected]>
Link: https://lore.kernel.org/r/20220518150150.1.Ie8ea0e945a9c15066237014be219eed60066d493@changeid
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-report')
0 files changed, 0 insertions, 0 deletions