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Commit 82a82340 authored by Federico Vaga's avatar Federico Vaga Committed by Greg Kroah-Hartman
Browse files

ipoctal: get carrier driver to avoid rmmod 



Signed-off-by: default avatarFederico Vaga <federico.vaga@cern.ch>
Acked-by: default avatarSamuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 36c53b3c

drivers/ipack/devices/ipoctal.c

+27 −3
Original line number Diff line number Diff line
@@ -55,6 +55,12 @@ struct ipoctal { 
	u8 __iomem			*int_space;

};



static inline struct ipoctal *chan_to_ipoctal(struct ipoctal_channel *chan,

					      unsigned int index)

{

	return container_of(chan, struct ipoctal, channel[index]);

}



static void ipoctal_reset_channel(struct ipoctal_channel *channel)

{

	iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);
@@ -82,12 +88,20 @@ static int ipoctal_port_activate(struct tty_port *port, struct tty_struct *tty) 


static int ipoctal_open(struct tty_struct *tty, struct file *file)

{

	struct ipoctal_channel *channel;

	struct ipoctal_channel *channel = dev_get_drvdata(tty->dev);

	struct ipoctal *ipoctal = chan_to_ipoctal(channel, tty->index);

	int err;



	channel = dev_get_drvdata(tty->dev);

	tty->driver_data = channel;



	return tty_port_open(&channel->tty_port, tty, file);

	if (!ipack_get_carrier(ipoctal->dev))

		return -EBUSY;



	err = tty_port_open(&channel->tty_port, tty, file);

	if (err)

		ipack_put_carrier(ipoctal->dev);



	return err;

}



static void ipoctal_reset_stats(struct ipoctal_stats *stats)
@@ -629,6 +643,15 @@ static void ipoctal_shutdown(struct tty_struct *tty) 
	clear_bit(ASYNCB_INITIALIZED, &channel->tty_port.flags);

}



static void ipoctal_cleanup(struct tty_struct *tty)

{

	struct ipoctal_channel *channel = tty->driver_data;

	struct ipoctal *ipoctal = chan_to_ipoctal(channel, tty->index);



	/* release the carrier driver */

	ipack_put_carrier(ipoctal->dev);

}



static const struct tty_operations ipoctal_fops = {

	.ioctl =		NULL,

	.open =			ipoctal_open,
@@ -640,6 +663,7 @@ static const struct tty_operations ipoctal_fops = { 
	.get_icount =		ipoctal_get_icount,

	.hangup =		ipoctal_hangup,

	.shutdown =		ipoctal_shutdown,

	.cleanup =              ipoctal_cleanup,

};



static int ipoctal_probe(struct ipack_device *dev)