usb: hub: delay hub autosuspend if USB3 port is still link training

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[ Upstream commit e86108940e ]

When initializing a hub we want to give a USB3 port in link training
the same debounce delay time before autosuspening the hub as already
trained, connected enabled ports.

USB3 ports won't reach the enabled state with "current connect status" and
"connect status change" bits set until the USB3 link training finishes.

Catching the port in link training (polling) and adding the debounce delay
prevents unnecessary failed attempts to autosuspend the hub.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Mathias Nyman 2018-11-28 15:55:21 +02:00 • committed by Greg Kroah-Hartman

parent 582f664651

commit 2fe047eb0e

1 changed files with 10 additions and 0 deletions

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drivers/usb/core/hub.c

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