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USB: cdc-acm: fix shutdown and suspend race

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commit ed79707403 upstream.

We should stop I/O unconditionally at suspend rather than rely on the
tty-port initialised flag (which is set prior to stopping I/O during
shutdown) in order to prevent suspend returning with URBs still active.

Fixes: 11ea859d64 ("USB: additional power savings for cdc-acm devices
that support remote wakeup")

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold
2014-05-26 19:23:40 +02:00
committed by Greg Kroah-Hartman
parent 60c64b0c78
commit 52c84b338b
1 changed files with 1 additions and 2 deletions
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3
drivers/usb/class/cdc-acm.c
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@@ -1470,8 +1470,7 @@ static int acm_suspend(struct usb_interface *intf, pm_message_t message)
if (cnt)
return 0;
if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
stop_data_traffic(acm);
stop_data_traffic(acm);
return 0;
}