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[4.14,199/242] USB: serial: mos7720: fix parallel-port state restore

Message ID 20201228124914.471655253@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Dec. 28, 2020, 12:50 p.m. UTC 
From: Johan Hovold <johan@kernel.org>

commit 975323ab8f116667676c30ca3502a6757bd89e8d upstream.

The parallel-port restore operations is called when a driver claims the
port and is supposed to restore the provided state (e.g. saved when
releasing the port).

Fixes: b69578df7e98 ("USB: usbserial: mos7720: add support for parallel port on moschip 7715")
Cc: stable <stable@vger.kernel.org>     # 2.6.35
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/serial/mos7720.c |    2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -640,6 +640,8 @@  static void parport_mos7715_restore_stat
 		spin_unlock(&release_lock);
 		return;
 	}
+	mos_parport->shadowDCR = s->u.pc.ctr;
+	mos_parport->shadowECR = s->u.pc.ecr;
 	write_parport_reg_nonblock(mos_parport, MOS7720_DCR,
 				   mos_parport->shadowDCR);
 	write_parport_reg_nonblock(mos_parport, MOS7720_ECR,