/*********************************************************************
- *
+ *
* Filename: ircomm_tty.c
* Version: 1.0
* Description: IrCOMM serial TTY driver
* Modified at: Wed Feb 23 00:09:02 2000
* Modified by: Dag Brattli <dagb@cs.uit.no>
* Sources: serial.c and previous IrCOMM work by Takahide Higuchi
- *
+ *
* Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
* Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
- *
+ *
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
- *
+ *
********************************************************************/
#include <linux/init.h>
static void ircomm_tty_send_xchar(struct tty_struct *tty, char ch);
static void ircomm_tty_wait_until_sent(struct tty_struct *tty, int timeout);
static void ircomm_tty_hangup(struct tty_struct *tty);
-static void ircomm_tty_do_softint(void *private_);
+static void ircomm_tty_do_softint(struct work_struct *work);
static void ircomm_tty_shutdown(struct ircomm_tty_cb *self);
static void ircomm_tty_stop(struct tty_struct *tty);
struct sk_buff *skb);
static int ircomm_tty_control_indication(void *instance, void *sap,
struct sk_buff *skb);
-static void ircomm_tty_flow_indication(void *instance, void *sap,
+static void ircomm_tty_flow_indication(void *instance, void *sap,
LOCAL_FLOW cmd);
#ifdef CONFIG_PROC_FS
static int ircomm_tty_read_proc(char *buf, char **start, off_t offset, int len,
driver = alloc_tty_driver(IRCOMM_TTY_PORTS);
if (!driver)
return -ENOMEM;
- ircomm_tty = hashbin_new(HB_LOCK);
+ ircomm_tty = hashbin_new(HB_LOCK);
if (ircomm_tty == NULL) {
IRDA_ERROR("%s(), can't allocate hashbin!\n", __FUNCTION__);
put_tty_driver(driver);
{
int ret;
- IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
+ IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
ret = tty_unregister_driver(driver);
- if (ret) {
- IRDA_ERROR("%s(), failed to unregister driver\n",
+ if (ret) {
+ IRDA_ERROR("%s(), failed to unregister driver\n",
__FUNCTION__);
return;
}
/*
* Function ircomm_startup (self)
*
- *
+ *
*
*/
static int ircomm_tty_startup(struct ircomm_tty_cb *self)
/* These callbacks we must handle ourselves */
notify.data_indication = ircomm_tty_data_indication;
notify.udata_indication = ircomm_tty_control_indication;
- notify.flow_indication = ircomm_tty_flow_indication;
+ notify.flow_indication = ircomm_tty_flow_indication;
/* Use the ircomm_tty interface for these ones */
- notify.disconnect_indication = ircomm_tty_disconnect_indication;
+ notify.disconnect_indication = ircomm_tty_disconnect_indication;
notify.connect_confirm = ircomm_tty_connect_confirm;
- notify.connect_indication = ircomm_tty_connect_indication;
+ notify.connect_indication = ircomm_tty_connect_indication;
strlcpy(notify.name, "ircomm_tty", sizeof(notify.name));
notify.instance = self;
if (!self->ircomm) {
- self->ircomm = ircomm_open(¬ify, self->service_type,
+ self->ircomm = ircomm_open(¬ify, self->service_type,
self->line);
}
if (!self->ircomm)
/*
* Function ircomm_block_til_ready (self, filp)
*
- *
+ *
*
*/
-static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
+static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
struct file *filp)
{
DECLARE_WAITQUEUE(wait, current);
int do_clocal = 0, extra_count = 0;
unsigned long flags;
struct tty_struct *tty;
-
+
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
tty = self->tty;
/*
* If non-blocking mode is set, or the port is not enabled,
* then make the check up front and then exit.
- */
+ */
if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
/* nonblock mode is set or port is not enabled */
self->flags |= ASYNC_NORMAL_ACTIVE;
IRDA_DEBUG(1, "%s(), doing CLOCAL!\n", __FUNCTION__ );
do_clocal = 1;
}
-
+
/* Wait for carrier detect and the line to become
* free (i.e., not in use by the callout). While we are in
* this loop, self->open_count is dropped by one, so that
* mgsl_close() knows when to free things. We restore it upon
* exit, either normal or abnormal.
*/
-
+
retval = 0;
add_wait_queue(&self->open_wait, &wait);
-
+
IRDA_DEBUG(2, "%s(%d):block_til_ready before block on %s open_count=%d\n",
__FILE__,__LINE__, tty->driver->name, self->open_count );
}
spin_unlock_irqrestore(&self->spinlock, flags);
self->blocked_open++;
-
+
while (1) {
if (tty->termios->c_cflag & CBAUD) {
/* Here, we use to lock those two guys, but
* I don't see the point (and I see the deadlock).
* Jean II */
self->settings.dte |= IRCOMM_RTS + IRCOMM_DTR;
-
+
ircomm_param_request(self, IRCOMM_DTE, TRUE);
}
-
+
current->state = TASK_INTERRUPTIBLE;
-
+
if (tty_hung_up_p(filp) ||
!test_bit(ASYNC_B_INITIALIZED, &self->flags)) {
retval = (self->flags & ASYNC_HUP_NOTIFY) ?
-EAGAIN : -ERESTARTSYS;
break;
}
-
- /*
+
+ /*
* Check if link is ready now. Even if CLOCAL is
* specified, we cannot return before the IrCOMM link is
- * ready
+ * ready
*/
- if (!test_bit(ASYNC_B_CLOSING, &self->flags) &&
- (do_clocal || (self->settings.dce & IRCOMM_CD)) &&
+ if (!test_bit(ASYNC_B_CLOSING, &self->flags) &&
+ (do_clocal || (self->settings.dce & IRCOMM_CD)) &&
self->state == IRCOMM_TTY_READY)
{
- break;
+ break;
}
-
+
if (signal_pending(current)) {
retval = -ERESTARTSYS;
break;
}
-
+
IRDA_DEBUG(1, "%s(%d):block_til_ready blocking on %s open_count=%d\n",
__FILE__,__LINE__, tty->driver->name, self->open_count );
-
+
schedule();
}
-
+
__set_current_state(TASK_RUNNING);
remove_wait_queue(&self->open_wait, &wait);
-
+
if (extra_count) {
/* ++ is not atomic, so this should be protected - Jean II */
spin_lock_irqsave(&self->spinlock, flags);
spin_unlock_irqrestore(&self->spinlock, flags);
}
self->blocked_open--;
-
+
IRDA_DEBUG(1, "%s(%d):block_til_ready after blocking on %s open_count=%d\n",
__FILE__,__LINE__, tty->driver->name, self->open_count);
-
+
if (!retval)
self->flags |= ASYNC_NORMAL_ACTIVE;
-
- return retval;
+
+ return retval;
}
/*
IRDA_ERROR("%s(), kmalloc failed!\n", __FUNCTION__);
return -ENOMEM;
}
-
+
self->magic = IRCOMM_TTY_MAGIC;
self->flow = FLOW_STOP;
self->line = line;
- INIT_WORK(&self->tqueue, ircomm_tty_do_softint, self);
+ INIT_WORK(&self->tqueue, ircomm_tty_do_softint);
self->max_header_size = IRCOMM_TTY_HDR_UNINITIALISED;
self->max_data_size = IRCOMM_TTY_DATA_UNINITIALISED;
self->close_delay = 5*HZ/10;
/* Init some important stuff */
init_timer(&self->watchdog_timer);
init_waitqueue_head(&self->open_wait);
- init_waitqueue_head(&self->close_wait);
+ init_waitqueue_head(&self->close_wait);
spin_lock_init(&self->spinlock);
- /*
+ /*
* Force TTY into raw mode by default which is usually what
* we want for IrCOMM and IrLPT. This way applications will
- * not have to twiddle with printcap etc.
+ * not have to twiddle with printcap etc.
*/
tty->termios->c_iflag = 0;
tty->termios->c_oflag = 0;
self->tty = tty;
spin_unlock_irqrestore(&self->spinlock, flags);
- IRDA_DEBUG(1, "%s(), %s%d, count = %d\n", __FUNCTION__ , tty->driver->name,
+ IRDA_DEBUG(1, "%s(), %s%d, count = %d\n", __FUNCTION__ , tty->driver->name,
self->line, self->open_count);
/* Not really used by us, but lets do it anyway */
ret = ircomm_tty_block_til_ready(self, filp);
if (ret) {
- IRDA_DEBUG(2,
+ IRDA_DEBUG(2,
"%s(), returning after block_til_ready with %d\n", __FUNCTION__ ,
ret);
* serial port won't be shutdown.
*/
IRDA_DEBUG(0, "%s(), bad serial port count; "
- "tty->count is 1, state->count is %d\n", __FUNCTION__ ,
+ "tty->count is 1, state->count is %d\n", __FUNCTION__ ,
self->open_count);
self->open_count = 1;
}
spin_unlock_irqrestore(&self->spinlock, flags);
/*
- * Now we wait for the transmit buffer to clear; and we notify
+ * Now we wait for the transmit buffer to clear; and we notify
* the line discipline to only process XON/XOFF characters.
*/
tty->closing = 1;
/*
* Function ircomm_tty_flush_buffer (tty)
*
- *
+ *
*
*/
static void ircomm_tty_flush_buffer(struct tty_struct *tty)
IRDA_ASSERT(self != NULL, return;);
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
- /*
- * Let do_softint() do this to avoid race condition with
- * do_softint() ;-)
+ /*
+ * Let do_softint() do this to avoid race condition with
+ * do_softint() ;-)
*/
schedule_work(&self->tqueue);
}
/*
- * Function ircomm_tty_do_softint (private_)
+ * Function ircomm_tty_do_softint (work)
*
* We use this routine to give the write wakeup to the user at at a
- * safe time (as fast as possible after write have completed). This
+ * safe time (as fast as possible after write have completed). This
* can be compared to the Tx interrupt.
*/
-static void ircomm_tty_do_softint(void *private_)
+static void ircomm_tty_do_softint(struct work_struct *work)
{
- struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) private_;
+ struct ircomm_tty_cb *self =
+ container_of(work, struct ircomm_tty_cb, tqueue);
struct tty_struct *tty;
unsigned long flags;
struct sk_buff *skb, *ctrl_skb;
/* Unlink transmit buffer */
spin_lock_irqsave(&self->spinlock, flags);
-
+
skb = self->tx_skb;
self->tx_skb = NULL;
/* Drop reference count - see ircomm_ttp_data_request(). */
dev_kfree_skb(skb);
}
-
+
/* Check if user (still) wants to be waken up */
- if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
tty->ldisc.write_wakeup)
{
(tty->ldisc.write_wakeup)(tty);
/* Fetch current transmit buffer */
skb = self->tx_skb;
- /*
+ /*
* Send out all the data we get, possibly as multiple fragmented
* frames, but this will only happen if the data is larger than the
* max data size. The normal case however is just the opposite, and
* this function may be called multiple times, and will then actually
- * defragment the data and send it out as one packet as soon as
+ * defragment the data and send it out as one packet as soon as
* possible, but at a safer point in time
*/
while (count) {
/* Adjust data size to the max data size */
if (size > self->max_data_size)
size = self->max_data_size;
-
- /*
+
+ /*
* Do we already have a buffer ready for transmit, or do
- * we need to allocate a new frame
+ * we need to allocate a new frame
*/
- if (skb) {
- /*
- * Any room for more data at the end of the current
+ if (skb) {
+ /*
+ * Any room for more data at the end of the current
* transmit buffer? Cannot use skb_tailroom, since
- * dev_alloc_skb gives us a larger skb than we
+ * dev_alloc_skb gives us a larger skb than we
* requested
* Note : use tx_data_size, because max_data_size
* may have changed and we don't want to overwrite
if (size > tailroom)
size = tailroom;
} else {
- /*
- * Current transmit frame is full, so break
+ /*
+ * Current transmit frame is full, so break
* out, so we can send it as soon as possible
*/
break;
spin_unlock_irqrestore(&self->spinlock, flags);
- /*
+ /*
* Schedule a new thread which will transmit the frame as soon
* as possible, but at a safe point in time. We do this so the
* "user" can give us data multiple times, as PPP does (because of
* its 256 byte tx buffer). We will then defragment and send out
- * all this data as one single packet.
+ * all this data as one single packet.
*/
schedule_work(&self->tqueue);
-
+
return len;
}
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
unsigned long orig_jiffies, poll_time;
unsigned long flags;
-
+
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
IRDA_ASSERT(self != NULL, return;);
*
* This routine notifies the tty driver that input buffers for the line
* discipline are close to full, and it should somehow signal that no
- * more characters should be sent to the tty.
+ * more characters should be sent to the tty.
*/
static void ircomm_tty_throttle(struct tty_struct *tty)
{
/* Software flow control? */
if (I_IXOFF(tty))
ircomm_tty_send_xchar(tty, STOP_CHAR(tty));
-
+
/* Hardware flow control? */
if (tty->termios->c_cflag & CRTSCTS) {
self->settings.dte &= ~IRCOMM_RTS;
self->settings.dte |= IRCOMM_DELTA_RTS;
-
+
ircomm_param_request(self, IRCOMM_DTE, TRUE);
}
- ircomm_flow_request(self->ircomm, FLOW_STOP);
+ ircomm_flow_request(self->ircomm, FLOW_STOP);
}
/*
ircomm_param_request(self, IRCOMM_DTE, TRUE);
IRDA_DEBUG(1, "%s(), FLOW_START\n", __FUNCTION__ );
}
- ircomm_flow_request(self->ircomm, FLOW_START);
+ ircomm_flow_request(self->ircomm, FLOW_START);
}
/*
spin_lock_irqsave(&self->spinlock, flags);
del_timer(&self->watchdog_timer);
-
+
/* Free parameter buffer */
if (self->ctrl_skb) {
dev_kfree_skb(self->ctrl_skb);
*
* This routine notifies the tty driver that it should hangup the tty
* device.
- *
+ *
*/
static void ircomm_tty_hangup(struct tty_struct *tty)
{
* Function ircomm_tty_start (tty)
*
* This routine notifies the tty driver that it resume sending
- * characters to the tty device.
+ * characters to the tty device.
*/
void ircomm_tty_start(struct tty_struct *tty)
{
* Function ircomm_tty_stop (tty)
*
* This routine notifies the tty driver that it should stop outputting
- * characters to the tty device.
+ * characters to the tty device.
*/
-static void ircomm_tty_stop(struct tty_struct *tty)
+static void ircomm_tty_stop(struct tty_struct *tty)
{
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
/*wake_up_interruptible(&self->delta_msr_wait);*/
}
if ((self->flags & ASYNC_CHECK_CD) && (status & IRCOMM_DELTA_CD)) {
- IRDA_DEBUG(2,
+ IRDA_DEBUG(2,
"%s(), ircomm%d CD now %s...\n", __FUNCTION__ , self->line,
(status & IRCOMM_CD) ? "on" : "off");
if (status & IRCOMM_CD) {
wake_up_interruptible(&self->open_wait);
} else {
- IRDA_DEBUG(2,
+ IRDA_DEBUG(2,
"%s(), Doing serial hangup..\n", __FUNCTION__ );
if (tty)
tty_hangup(tty);
if (self->flags & ASYNC_CTS_FLOW) {
if (tty->hw_stopped) {
if (status & IRCOMM_CTS) {
- IRDA_DEBUG(2,
+ IRDA_DEBUG(2,
"%s(), CTS tx start...\n", __FUNCTION__ );
tty->hw_stopped = 0;
-
+
/* Wake up processes blocked on open */
wake_up_interruptible(&self->open_wait);
}
} else {
if (!(status & IRCOMM_CTS)) {
- IRDA_DEBUG(2,
+ IRDA_DEBUG(2,
"%s(), CTS tx stop...\n", __FUNCTION__ );
tty->hw_stopped = 1;
}
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
-
+
IRDA_ASSERT(self != NULL, return -1;);
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
IRDA_ASSERT(skb != NULL, return -1;);
return 0;
}
- /*
+ /*
* If we receive data when hardware is stopped then something is wrong.
* We try to poll the peers line settings to check if we are up todate.
- * Devices like WinCE can do this, and since they don't send any
+ * Devices like WinCE can do this, and since they don't send any
* params, we can just as well declare the hardware for running.
*/
if (self->tty->hw_stopped && (self->flow == FLOW_START)) {
ircomm_tty_link_established(self);
}
- /*
+ /*
* Just give it over to the line discipline. There is no need to
- * involve the flip buffers, since we are not running in an interrupt
+ * involve the flip buffers, since we are not running in an interrupt
* handler
*/
self->tty->ldisc.receive_buf(self->tty, skb->data, NULL, skb->len);
int clen;
IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
-
+
IRDA_ASSERT(self != NULL, return -1;);
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
IRDA_ASSERT(skb != NULL, return -1;);
clen = skb->data[0];
- irda_param_extract_all(self, skb->data+1, IRDA_MIN(skb->len-1, clen),
+ irda_param_extract_all(self, skb->data+1, IRDA_MIN(skb->len-1, clen),
&ircomm_param_info);
/* No need to kfree_skb - see ircomm_control_indication() */
* transmission of data. We just mark the hardware as stopped, and wait
* for IrTTP to notify us that things are OK again.
*/
-static void ircomm_tty_flow_indication(void *instance, void *sap,
+static void ircomm_tty_flow_indication(void *instance, void *sap,
LOCAL_FLOW cmd)
{
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
static int ircomm_tty_line_info(struct ircomm_tty_cb *self, char *buf)
{
- int ret=0;
+ int ret=0;
ret += sprintf(buf+ret, "State: %s\n", ircomm_tty_state[self->state]);
ret += sprintf(buf+ret, "3_WIRE_RAW");
else
ret += sprintf(buf+ret, "No common service type!\n");
- ret += sprintf(buf+ret, "\n");
+ ret += sprintf(buf+ret, "\n");
ret += sprintf(buf+ret, "Port name: %s\n", self->settings.port_name);
- ret += sprintf(buf+ret, "DTE status: ");
- if (self->settings.dte & IRCOMM_RTS)
- ret += sprintf(buf+ret, "RTS|");
- if (self->settings.dte & IRCOMM_DTR)
- ret += sprintf(buf+ret, "DTR|");
+ ret += sprintf(buf+ret, "DTE status: ");
+ if (self->settings.dte & IRCOMM_RTS)
+ ret += sprintf(buf+ret, "RTS|");
+ if (self->settings.dte & IRCOMM_DTR)
+ ret += sprintf(buf+ret, "DTR|");
if (self->settings.dte)
ret--; /* remove the last | */
- ret += sprintf(buf+ret, "\n");
+ ret += sprintf(buf+ret, "\n");
ret += sprintf(buf+ret, "DCE status: ");
- if (self->settings.dce & IRCOMM_CTS)
- ret += sprintf(buf+ret, "CTS|");
- if (self->settings.dce & IRCOMM_DSR)
- ret += sprintf(buf+ret, "DSR|");
- if (self->settings.dce & IRCOMM_CD)
- ret += sprintf(buf+ret, "CD|");
- if (self->settings.dce & IRCOMM_RI)
- ret += sprintf(buf+ret, "RI|");
+ if (self->settings.dce & IRCOMM_CTS)
+ ret += sprintf(buf+ret, "CTS|");
+ if (self->settings.dce & IRCOMM_DSR)
+ ret += sprintf(buf+ret, "DSR|");
+ if (self->settings.dce & IRCOMM_CD)
+ ret += sprintf(buf+ret, "CD|");
+ if (self->settings.dce & IRCOMM_RI)
+ ret += sprintf(buf+ret, "RI|");
if (self->settings.dce)
ret--; /* remove the last | */
- ret += sprintf(buf+ret, "\n");
+ ret += sprintf(buf+ret, "\n");
ret += sprintf(buf+ret, "Configuration: ");
if (!self->settings.null_modem)
ret += sprintf(buf+ret, "DTE <-> DCE\n");
else
- ret += sprintf(buf+ret,
+ ret += sprintf(buf+ret,
"DTE <-> DTE (null modem emulation)\n");
ret += sprintf(buf+ret, "Data rate: %d\n", self->settings.data_rate);
ret += sprintf(buf+ret, "ENQ_ACK_OUT|");
if (self->settings.flow_control)
ret--; /* remove the last | */
- ret += sprintf(buf+ret, "\n");
+ ret += sprintf(buf+ret, "\n");
ret += sprintf(buf+ret, "Flags: ");
if (self->flags & ASYNC_CTS_FLOW)
ret--; /* remove the last | */
ret += sprintf(buf+ret, "\n");
- ret += sprintf(buf+ret, "Role: %s\n", self->client ?
+ ret += sprintf(buf+ret, "Role: %s\n", self->client ?
"client" : "server");
ret += sprintf(buf+ret, "Open count: %d\n", self->open_count);
ret += sprintf(buf+ret, "Max data size: %d\n", self->max_data_size);
ret += sprintf(buf+ret, "Max header size: %d\n", self->max_header_size);
-
+
if (self->tty)
- ret += sprintf(buf+ret, "Hardware: %s\n",
+ ret += sprintf(buf+ret, "Hardware: %s\n",
self->tty->hw_stopped ? "Stopped" : "Running");
- ret += sprintf(buf+ret, "\n");
- return ret;
+ ret += sprintf(buf+ret, "\n");
+ return ret;
}
/*
* Function ircomm_tty_read_proc (buf, start, offset, len, eof, unused)
*
- *
+ *
*
*/
#ifdef CONFIG_PROC_FS
int *eof, void *unused)
{
struct ircomm_tty_cb *self;
- int count = 0, l;
- off_t begin = 0;
+ int count = 0, l;
+ off_t begin = 0;
unsigned long flags;
spin_lock_irqsave(&ircomm_tty->hb_spinlock, flags);
if (self->magic != IRCOMM_TTY_MAGIC)
break;
- l = ircomm_tty_line_info(self, buf + count);
- count += l;
- if (count+begin > offset+len)
- goto done;
- if (count+begin < offset) {
- begin += count;
- count = 0;
- }
-
+ l = ircomm_tty_line_info(self, buf + count);
+ count += l;
+ if (count+begin > offset+len)
+ goto done;
+ if (count+begin < offset) {
+ begin += count;
+ count = 0;
+ }
+
self = (struct ircomm_tty_cb *) hashbin_get_next(ircomm_tty);
- }
- *eof = 1;
+ }
+ *eof = 1;
done:
spin_unlock_irqrestore(&ircomm_tty->hb_spinlock, flags);
- if (offset >= count+begin)
- return 0;
- *start = buf + (offset-begin);
- return ((len < begin+count-offset) ? len : begin+count-offset);
+ if (offset >= count+begin)
+ return 0;
+ *start = buf + (offset-begin);
+ return ((len < begin+count-offset) ? len : begin+count-offset);
}
#endif /* CONFIG_PROC_FS */
projects / linux-drm-fsl-dcu.git / blobdiff