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TTY: add tty_port_tty_wakeup helper

Browse source 
It allows for cleaning up on a considerable amount of places. They did
port_get, wakeup, kref_put. Now the only thing needed is to call
tty_port_tty_wakeup which does exactly that.

One exception is ifx6x60 where tty_wakeup was open-coded. We now call
tty_wakeup properly there.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby 2013-03-07 13:12:29 +01:00 committed by Greg Kroah-Hartman
parent 6982a39842
commit 6aad04f213
22 changed files with 51 additions and 176 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
arch/um/drivers/line.c
View file

@ -248,7 +248,6 @@ static irqreturn_t line_write_interrupt(int irq, void *data)
{
struct chan *chan = data;
struct line *line = chan->line;
struct tty_struct *tty;
int err;
/*
@ -267,12 +266,7 @@ static irqreturn_t line_write_interrupt(int irq, void *data)
}
spin_unlock(&line->lock);
tty = tty_port_tty_get(&line->port);
if (tty == NULL)
return IRQ_NONE;
tty_wakeup(tty);
tty_kref_put(tty);
tty_port_tty_wakeup(&line->port);
return IRQ_HANDLED;
}

7
drivers/isdn/capi/capi.c
View file

@ -569,7 +569,6 @@ static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
{
struct capidev *cdev = ap->private;
#ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
struct tty_struct *tty;
struct capiminor *mp;
u16 datahandle;
struct capincci *np;
@ -627,11 +626,7 @@ static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
CAPIMSG_U16(skb->data, CAPIMSG_BASELEN + 4 + 2));
kfree_skb(skb);
capiminor_del_ack(mp, datahandle);
tty = tty_port_tty_get(&mp->port);
if (tty) {
tty_wakeup(tty);
tty_kref_put(tty);
}
tty_port_tty_wakeup(&mp->port);
handle_minor_send(mp);
} else {

6
drivers/isdn/gigaset/interface.c
View file

@ -487,12 +487,8 @@ static const struct tty_operations if_ops = {
static void if_wake(unsigned long data)
{
struct cardstate *cs = (struct cardstate *)data;
struct tty_struct *tty = tty_port_tty_get(&cs->port);
if (tty) {
tty_wakeup(tty);
tty_kref_put(tty);
}
tty_port_tty_wakeup(&cs->port);
}
/*** interface to common ***/

13
drivers/net/usb/hso.c
View file

@ -1925,7 +1925,6 @@ static void hso_std_serial_write_bulk_callback(struct urb *urb)
{
struct hso_serial *serial = urb->context;
int status = urb->status;
struct tty_struct *tty;
/* sanity check */
if (!serial) {
@ -1941,11 +1940,7 @@ static void hso_std_serial_write_bulk_callback(struct urb *urb)
return;
}
hso_put_activity(serial->parent);
tty = tty_port_tty_get(&serial->port);
if (tty) {
tty_wakeup(tty);
tty_kref_put(tty);
}
tty_port_tty_wakeup(&serial->port);
hso_kick_transmit(serial);
D1(" ");
@ -2008,12 +2003,8 @@ static void ctrl_callback(struct urb *urb)
put_rxbuf_data_and_resubmit_ctrl_urb(serial);
spin_unlock(&serial->serial_lock);
} else {
struct tty_struct *tty = tty_port_tty_get(&serial->port);
hso_put_activity(serial->parent);
if (tty) {
tty_wakeup(tty);
tty_kref_put(tty);
}
tty_port_tty_wakeup(&serial->port);
/* response to a write command */
hso_kick_transmit(serial);
}

9
drivers/s390/char/sclp_tty.c
View file

@ -107,7 +107,6 @@ sclp_tty_write_room (struct tty_struct *tty)
static void
sclp_ttybuf_callback(struct sclp_buffer *buffer, int rc)
{
struct tty_struct *tty;
unsigned long flags;
void *page;
@ -125,12 +124,8 @@ sclp_ttybuf_callback(struct sclp_buffer *buffer, int rc)
struct sclp_buffer, list);
spin_unlock_irqrestore(&sclp_tty_lock, flags);
} while (buffer && sclp_emit_buffer(buffer, sclp_ttybuf_callback));
/* check if the tty needs a wake up call */
tty = tty_port_tty_get(&sclp_port);
if (tty != NULL) {
tty_wakeup(tty);
tty_kref_put(tty);
}
tty_port_tty_wakeup(&sclp_port);
}
static inline void

8
drivers/s390/char/sclp_vt220.c
View file

@ -114,7 +114,6 @@ static struct sclp_register sclp_vt220_register = {
static void
sclp_vt220_process_queue(struct sclp_vt220_request *request)
{
struct tty_struct *tty;
unsigned long flags;
void *page;
@ -139,12 +138,7 @@ sclp_vt220_process_queue(struct sclp_vt220_request *request)
} while (__sclp_vt220_emit(request));
if (request == NULL && sclp_vt220_flush_later)
sclp_vt220_emit_current();
/* Check if the tty needs a wake up call */
tty = tty_port_tty_get(&sclp_vt220_port);
if (tty) {
tty_wakeup(tty);
tty_kref_put(tty);
}
tty_port_tty_wakeup(&sclp_vt220_port);
}
#define SCLP_BUFFER_MAX_RETRY 1

10
drivers/staging/fwserial/fwserial.c
View file

@ -744,7 +744,6 @@ static void fwtty_tx_complete(struct fw_card *card, int rcode,
struct fwtty_transaction *txn)
{
struct fwtty_port *port = txn->port;
struct tty_struct *tty;
int len;
fwtty_dbg(port, "rcode: %d", rcode);
@ -769,13 +768,8 @@ static void fwtty_tx_complete(struct fw_card *card, int rcode,
port->stats.dropped += txn->dma_pended.len;
}
if (len < WAKEUP_CHARS) {
tty = tty_port_tty_get(&port->port);
if (tty) {
tty_wakeup(tty);
tty_kref_put(tty);
}
}
if (len < WAKEUP_CHARS)
tty_port_tty_wakeup(&port->port);
}
static int fwtty_tx(struct fwtty_port *port, bool drain)

7
drivers/staging/serqt_usb2/serqt_usb2.c
View file

@ -264,7 +264,6 @@ static void ProcessRxChar(struct usb_serial_port *port, unsigned char data)
static void qt_write_bulk_callback(struct urb *urb)
{
struct tty_struct *tty;
int status;
struct quatech_port *quatech_port;
@ -278,11 +277,7 @@ static void qt_write_bulk_callback(struct urb *urb)
quatech_port = urb->context;
tty = tty_port_tty_get(&quatech_port->port->port);
if (tty)
tty_wakeup(tty);
tty_kref_put(tty);
tty_port_tty_wakeup(&quatech_port->port->port);
}
static void qt_interrupt_callback(struct urb *urb)

6
drivers/tty/ehv_bytechan.c
View file

@ -472,13 +472,9 @@ static void ehv_bc_tx_dequeue(struct ehv_bc_data *bc)
static irqreturn_t ehv_bc_tty_tx_isr(int irq, void *data)
{
struct ehv_bc_data *bc = data;
struct tty_struct *ttys = tty_port_tty_get(&bc->port);
ehv_bc_tx_dequeue(bc);
if (ttys) {
tty_wakeup(ttys);
tty_kref_put(ttys);
}
tty_port_tty_wakeup(&bc->port);
return IRQ_HANDLED;
}

7
drivers/tty/hvc/hvsi.c
View file

@ -861,7 +861,6 @@ static void hvsi_write_worker(struct work_struct *work)
{
struct hvsi_struct *hp =
container_of(work, struct hvsi_struct, writer.work);
struct tty_struct *tty;
unsigned long flags;
#ifdef DEBUG
static long start_j = 0;
@ -895,11 +894,7 @@ static void hvsi_write_worker(struct work_struct *work)
start_j = 0;
#endif /* DEBUG */
wake_up_all(&hp->emptyq);
tty = tty_port_tty_get(&hp->port);
if (tty) {
tty_wakeup(tty);
tty_kref_put(tty);
}
tty_port_tty_wakeup(&hp->port);
}
out:

6
drivers/tty/nozomi.c
View file

@ -791,7 +791,6 @@ static int send_data(enum port_type index, struct nozomi *dc)
const u8 toggle = port->toggle_ul;
void __iomem *addr = port->ul_addr[toggle];
const u32 ul_size = port->ul_size[toggle];
struct tty_struct *tty = tty_port_tty_get(&port->port);
/* Get data from tty and place in buf for now */
size = kfifo_out(&port->fifo_ul, dc->send_buf,
@ -799,7 +798,6 @@ static int send_data(enum port_type index, struct nozomi *dc)
if (size == 0) {
DBG4("No more data to send, disable link:");
tty_kref_put(tty);
return 0;
}
@ -809,10 +807,8 @@ static int send_data(enum port_type index, struct nozomi *dc)
write_mem32(addr, (u32 *) &size, 4);
write_mem32(addr + 4, (u32 *) dc->send_buf, size);
if (tty)
tty_wakeup(tty);
tty_port_tty_wakeup(&port->port);
tty_kref_put(tty);
return 1;
}

33
drivers/tty/serial/ifx6x60.c
View file

@ -442,25 +442,6 @@ static void ifx_spi_setup_spi_header(unsigned char *txbuffer, int tx_count,
txbuffer[1] |= (more << IFX_SPI_MORE_BIT) & IFX_SPI_MORE_MASK;
}
/**
* ifx_spi_wakeup_serial - SPI space made
* @port_data: our SPI device
*
* We have emptied the FIFO enough that we want to get more data
* queued into it. Poke the line discipline via tty_wakeup so that
* it will feed us more bits
*/
static void ifx_spi_wakeup_serial(struct ifx_spi_device *ifx_dev)
{
struct tty_struct *tty;
tty = tty_port_tty_get(&ifx_dev->tty_port);
if (!tty)
return;
tty_wakeup(tty);
tty_kref_put(tty);
}
/**
* ifx_spi_prepare_tx_buffer - prepare transmit frame
* @ifx_dev: our SPI device
@ -506,7 +487,7 @@ static int ifx_spi_prepare_tx_buffer(struct ifx_spi_device *ifx_dev)
tx_count += temp_count;
if (temp_count == queue_length)
/* poke port to get more data */
ifx_spi_wakeup_serial(ifx_dev);
tty_port_tty_wakeup(&ifx_dev->tty_port);
else /* more data in port, use next SPI message */
ifx_dev->spi_more = 1;
}
@ -683,8 +664,6 @@ static void ifx_spi_insert_flip_string(struct ifx_spi_device *ifx_dev,
static void ifx_spi_complete(void *ctx)
{
struct ifx_spi_device *ifx_dev = ctx;
struct tty_struct *tty;
struct tty_ldisc *ldisc = NULL;
int length;
int actual_length;
unsigned char more;
@ -762,15 +741,7 @@ complete_exit:
*/
ifx_spi_power_state_clear(ifx_dev,
IFX_SPI_POWER_DATA_PENDING);
tty = tty_port_tty_get(&ifx_dev->tty_port);
if (tty) {
ldisc = tty_ldisc_ref(tty);
if (ldisc) {
ldisc->ops->write_wakeup(tty);
tty_ldisc_deref(ldisc);
}
tty_kref_put(tty);
}
tty_port_tty_wakeup(&ifx_dev->tty_port);
}
}
}

16
drivers/tty/tty_port.c
View file

@ -232,6 +232,22 @@ void tty_port_hangup(struct tty_port *port)
}
EXPORT_SYMBOL(tty_port_hangup);
/**
* tty_port_tty_wakeup - helper to wake up a tty
*
* @port: tty port
*/
void tty_port_tty_wakeup(struct tty_port *port)
{
struct tty_struct *tty = tty_port_tty_get(port);
if (tty) {
tty_wakeup(tty);
tty_kref_put(tty);
}
}
EXPORT_SYMBOL_GPL(tty_port_tty_wakeup);
/**
* tty_port_carrier_raised - carrier raised check
* @port: tty port

7
drivers/usb/class/cdc-acm.c
View file

@ -475,15 +475,10 @@ static void acm_write_bulk(struct urb *urb)
static void acm_softint(struct work_struct *work)
{
struct acm *acm = container_of(work, struct acm, work);
struct tty_struct *tty;
dev_vdbg(&acm->data->dev, "%s\n", __func__);
tty = tty_port_tty_get(&acm->port);
if (!tty)
return;
tty_wakeup(tty);
tty_kref_put(tty);
tty_port_tty_wakeup(&acm->port);
}
/*

17
drivers/usb/serial/digi_acceleport.c
View file

@ -210,7 +210,6 @@ struct digi_port {
/* Local Function Declarations */
static void digi_wakeup_write(struct usb_serial_port *port);
static void digi_wakeup_write_lock(struct work_struct *work);
static int digi_write_oob_command(struct usb_serial_port *port,
unsigned char *buf, int count, int interruptible);
@ -374,20 +373,10 @@ static void digi_wakeup_write_lock(struct work_struct *work)
unsigned long flags;
spin_lock_irqsave(&priv->dp_port_lock, flags);
digi_wakeup_write(port);
tty_port_tty_wakeup(&port->port);
spin_unlock_irqrestore(&priv->dp_port_lock, flags);
}
static void digi_wakeup_write(struct usb_serial_port *port)
{
struct tty_struct *tty = tty_port_tty_get(&port->port);
if (tty) {
tty_wakeup(tty);
tty_kref_put(tty);
}
}
/*
* Digi Write OOB Command
*
@ -1044,7 +1033,7 @@ static void digi_write_bulk_callback(struct urb *urb)
}
}
/* wake up processes sleeping on writes immediately */
digi_wakeup_write(port);
tty_port_tty_wakeup(&port->port);
/* also queue up a wakeup at scheduler time, in case we */
/* lost the race in write_chan(). */
schedule_work(&priv->dp_wakeup_work);
@ -1522,7 +1511,7 @@ static int digi_read_oob_callback(struct urb *urb)
/* port must be open to use tty struct */
if (rts) {
tty->hw_stopped = 0;
digi_wakeup_write(port);
tty_port_tty_wakeup(&port->port);
}
} else {
priv->dp_modem_signals &= ~TIOCM_CTS;

28
drivers/usb/serial/io_edgeport.c
View file

@ -565,7 +565,6 @@ static void edge_interrupt_callback(struct urb *urb)
struct device *dev;
struct edgeport_port *edge_port;
struct usb_serial_port *port;
struct tty_struct *tty;
unsigned char *data = urb->transfer_buffer;
int length = urb->actual_length;
int bytes_avail;
@ -644,12 +643,7 @@ static void edge_interrupt_callback(struct urb *urb)
/* tell the tty driver that something
has changed */
tty = tty_port_tty_get(
&edge_port->port->port);
if (tty) {
tty_wakeup(tty);
tty_kref_put(tty);
}
tty_port_tty_wakeup(&edge_port->port->port);
/* Since we have more credit, check
if more data can be sent */
send_more_port_data(edge_serial,
@ -738,7 +732,6 @@ static void edge_bulk_in_callback(struct urb *urb)
static void edge_bulk_out_data_callback(struct urb *urb)
{
struct edgeport_port *edge_port = urb->context;
struct tty_struct *tty;
int status = urb->status;
if (status) {
@ -747,14 +740,8 @@ static void edge_bulk_out_data_callback(struct urb *urb)
__func__, status);
}
tty = tty_port_tty_get(&edge_port->port->port);
if (tty && edge_port->open) {
/* let the tty driver wakeup if it has a special
write_wakeup function */
tty_wakeup(tty);
}
tty_kref_put(tty);
if (edge_port->open)
tty_port_tty_wakeup(&edge_port->port->port);
/* Release the Write URB */
edge_port->write_in_progress = false;
@ -773,7 +760,6 @@ static void edge_bulk_out_data_callback(struct urb *urb)
static void edge_bulk_out_cmd_callback(struct urb *urb)
{
struct edgeport_port *edge_port = urb->context;
struct tty_struct *tty;
int status = urb->status;
atomic_dec(&CmdUrbs);
@ -794,13 +780,9 @@ static void edge_bulk_out_cmd_callback(struct urb *urb)
return;
}
/* Get pointer to tty */
tty = tty_port_tty_get(&edge_port->port->port);
/* tell the tty driver that something has changed */
if (tty && edge_port->open)
tty_wakeup(tty);
tty_kref_put(tty);
if (edge_port->open)
tty_port_tty_wakeup(&edge_port->port->port);
/* we have completed the command */
edge_port->commandPending = false;

6
drivers/usb/serial/keyspan_pda.c
View file

@ -104,10 +104,8 @@ static void keyspan_pda_wakeup_write(struct work_struct *work)
struct keyspan_pda_private *priv =
container_of(work, struct keyspan_pda_private, wakeup_work);
struct usb_serial_port *port = priv->port;
struct tty_struct *tty = tty_port_tty_get(&port->port);
if (tty)
tty_wakeup(tty);
tty_kref_put(tty);
tty_port_tty_wakeup(&port->port);
}
static void keyspan_pda_request_unthrottle(struct work_struct *work)

8
drivers/usb/serial/mos7720.c
View file

@ -932,7 +932,6 @@ static void mos7720_bulk_in_callback(struct urb *urb)
static void mos7720_bulk_out_data_callback(struct urb *urb)
{
struct moschip_port *mos7720_port;
struct tty_struct *tty;
int status = urb->status;
if (status) {
@ -946,11 +945,8 @@ static void mos7720_bulk_out_data_callback(struct urb *urb)
return ;
}
tty = tty_port_tty_get(&mos7720_port->port->port);
if (tty && mos7720_port->open)
tty_wakeup(tty);
tty_kref_put(tty);
if (mos7720_port->open)
tty_port_tty_wakeup(&mos7720_port->port->port);
}
/*

7
drivers/usb/serial/mos7840.c
View file

@ -814,7 +814,6 @@ static void mos7840_bulk_out_data_callback(struct urb *urb)
{
struct moschip_port *mos7840_port;
struct usb_serial_port *port;
struct tty_struct *tty;
int status = urb->status;
int i;
@ -837,10 +836,8 @@ static void mos7840_bulk_out_data_callback(struct urb *urb)
if (mos7840_port_paranoia_check(port, __func__))
return;
tty = tty_port_tty_get(&port->port);
if (tty && mos7840_port->open)
tty_wakeup(tty);
tty_kref_put(tty);
if (mos7840_port->open)
tty_port_tty_wakeup(&port->port);
}

7
drivers/usb/serial/ti_usb_3410_5052.c
View file

@ -1227,7 +1227,6 @@ static void ti_send(struct ti_port *tport)
{
int count, result;
struct usb_serial_port *port = tport->tp_port;
struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
unsigned long flags;
spin_lock_irqsave(&tport->tp_lock, flags);
@ -1268,14 +1267,12 @@ static void ti_send(struct ti_port *tport)
}
/* more room in the buffer for new writes, wakeup */
if (tty)
tty_wakeup(tty);
tty_kref_put(tty);
tty_port_tty_wakeup(&port->port);
wake_up_interruptible(&tport->tp_write_wait);
return;
unlock:
spin_unlock_irqrestore(&tport->tp_lock, flags);
tty_kref_put(tty);
return;
}

10
drivers/usb/serial/usb-serial.c
View file

@ -541,16 +541,8 @@ static void usb_serial_port_work(struct work_struct *work)
{
struct usb_serial_port *port =
container_of(work, struct usb_serial_port, work);
struct tty_struct *tty;
tty = tty_port_tty_get(&port->port);
if (!tty)
return;
dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);
tty_wakeup(tty);
tty_kref_put(tty);
tty_port_tty_wakeup(&port->port);
}
static void kill_traffic(struct usb_serial_port *port)

1
include/linux/tty.h
View file

@ -534,6 +534,7 @@ extern int tty_port_carrier_raised(struct tty_port *port);
extern void tty_port_raise_dtr_rts(struct tty_port *port);
extern void tty_port_lower_dtr_rts(struct tty_port *port);
extern void tty_port_hangup(struct tty_port *port);
extern void tty_port_tty_wakeup(struct tty_port *port);
extern int tty_port_block_til_ready(struct tty_port *port,
struct tty_struct *tty, struct file *filp);
extern int tty_port_close_start(struct tty_port *port,