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, 17 Jan 2023 16:40:56 +0000 (17:40 +0100)
commit7171b0e261b17de96490adf053b8bb4b00061bcf
tree3dfb10942e731c9a992cf0f7ab3f78a6634f3b56
parent11cefeb2058f9f2322713b2683be9301556705e2
usb: core: hub: disable autosuspend for TI TUSB8041

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