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Commit 9d5a037b authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
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USB: serial: keyspan_pda: fix stalled writes 



commit c01d2c58698f710c9e13ba3e2d296328606f74fd upstream.

Make sure to clear the write-busy flag also in case no new data was
submitted due to lack of device buffer space so that writing is
resumed once space again becomes available.

Fixes: 507ca9bc ("[PATCH] USB: add ability for usb-serial drivers to determine if their write urb is currently being used.")
Cc: stable <stable@vger.kernel.org>     # 2.6.13
Acked-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 8ba8e197

drivers/usb/serial/keyspan_pda.c

+1 −1
Original line number Diff line number Diff line
@@ -548,7 +548,7 @@ static int keyspan_pda_write(struct tty_struct *tty, 


	rc = count;

exit:

	if (rc < 0)

	if (rc <= 0)

		set_bit(0, &port->write_urbs_free);

	return rc;

}