Re: [PATCH] usb: Probe EHCI, OHCI controllers asynchronously

[Doug Anderson]

Hi,

On Wed, May 18, 2022 at 3:04 PM Brian Norris <briannorris@xxxxxxxxxxxx> wrote:
>
> From: Dmitry Torokhov <dtor@xxxxxxxxxxxx>
>
> 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.
>
> Signed-off-by: Dmitry Torokhov <dtor@xxxxxxxxxxxx>
> [Brian: rewrote commit message, refreshed, but retained dtor's original
>  authorship ]
> Signed-off-by: Brian Norris <briannorris@xxxxxxxxxxxx>
> ---
>
>  drivers/usb/host/ehci-platform.c | 1 +
>  drivers/usb/host/ohci-platform.c | 1 +
>  2 files changed, 2 insertions(+)

Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>