USB: usb_wwan: fix urb leak at shutdown

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commit 79eed03e77 upstream.

The delayed-write queue was never emptied at shutdown (close), something
which could lead to leaked urbs if the port is closed before being
runtime resumed due to a write.

When this happens the output buffer would not drain on close
(closing_wait timeout), and after consecutive opens, writes could be
corrupted with previously buffered data, transfered with reduced
throughput or completely blocked.

Note that unbusy_queued_urb() was simply moved out of CONFIG_PM.

Fixes: 383cedc3bb ("USB: serial: full autosuspend support for the
option driver")

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

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Johan Hovold 2014-05-26 19:23:16 +02:00 • committed by Greg Kroah-Hartman

parent 47909efe22

commit 21286f6f66

1 changed files with 22 additions and 12 deletions

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34

drivers/usb/serial/usb_wwan.c

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