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USB: serial: mos7720: fix parallel-port state restore

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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: b69578df7e ("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>
This commit is contained in:
Johan Hovold 2020-11-04 17:47:27 +01:00 • committed by Greg Kroah-Hartman
commit 08c24438fb
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/serial/mos7720.c
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@ -638,6 +638,8 @@ static void parport_mos7715_restore_state(struct parport *pp,
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,