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Commit e0f8d323 authored by Samuel Iglesias Gonsalvez's avatar Samuel Iglesias Gonsalvez Committed by Greg Kroah-Hartman
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ipack/devices/ipoctal: added shutdown callback 



Added shutdown callback to disable RX and TX when there is no other client
accesing the device.

Signed-off-by: default avatarSamuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b0d17fbd

drivers/ipack/devices/ipoctal.c

+17 −0
Original line number Diff line number Diff line
@@ -625,6 +625,22 @@ static void ipoctal_hangup(struct tty_struct *tty) 
	wake_up_interruptible(&channel->tty_port.open_wait);

}



static void ipoctal_shutdown(struct tty_struct *tty)

{

	struct ipoctal_channel *channel = tty->driver_data;



	if (channel == NULL)

		return;



	iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);

	channel->rx_enable = 0;

	iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr);

	iowrite8(CR_CMD_RESET_TX, &channel->regs->w.cr);

	iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr);

	iowrite8(CR_CMD_RESET_MR, &channel->regs->w.cr);

	clear_bit(ASYNCB_INITIALIZED, &channel->tty_port.flags);

}



static const struct tty_operations ipoctal_fops = {

	.ioctl =		NULL,

	.open =			ipoctal_open,
@@ -635,6 +651,7 @@ static const struct tty_operations ipoctal_fops = { 
	.chars_in_buffer =	ipoctal_chars_in_buffer,

	.get_icount =		ipoctal_get_icount,

	.hangup =		ipoctal_hangup,

	.shutdown =		ipoctal_shutdown,

};



static int ipoctal_probe(struct ipack_device *dev)