USB: sierra: fix remote wakeup

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commit 80cc0fcbda upstream.

Make sure that needs_remote_wake up is always set when there are open
ports.

Currently close() would unconditionally set needs_remote_wakeup to 0
even though there might still be open ports. This could lead to blocked
input and possibly dropped data on devices that do not support remote
wakeup (and which must therefore not be runtime suspended while open).

Add an open_ports counter (protected by the susp_lock) and only clear
needs_remote_wakeup when the last port is closed.

Fixes: e6929a9020 ("USB: support for autosuspend in sierra while
online")

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

Johan Hovold 2014-05-26 19:22:54 +02:00 • committed by Greg Kroah-Hartman

parent b5079ac779

commit f7c4c1060e

1 changed files with 5 additions and 2 deletions

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drivers/usb/serial/sierra.c

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