usb: core: hub: disable autosuspend for TI TUSB8041
authorFlavio Suligoi <f.suligoi@asem.it>
Mon, 19 Dec 2022 12:47:59 +0000 (13:47 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 24 Jan 2023 06:22:45 +0000 (07:22 +0100)
commitb5d24a8e4a61afd0cca22534ecad9b2be98570c9
treef32dcf6e9738d225840b979f8b4ad7a31436d59e
parent61a0890cb95afec5c8a2f4a879de2b6220984ef1
usb: core: hub: disable autosuspend for TI TUSB8041

commit 7171b0e261b17de96490adf053b8bb4b00061bcf upstream.

The Texas Instruments TUSB8041 has an autosuspend problem at high
temperature.

If there is not USB traffic, after a couple of ms, the device enters in
autosuspend mode. In this condition the external clock stops working, to
save energy. When the USB activity turns on, ther hub exits the
autosuspend state, the clock starts running again and all works fine.

At ambient temperature all works correctly, but at high temperature,
when the USB activity turns on, the external clock doesn't restart and
the hub disappears from the USB bus.

Disabling the autosuspend mode for this hub solves the issue.

Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
Cc: stable <stable@kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20221219124759.3207032-1-f.suligoi@asem.it
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/core/hub.c