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plug various tty/serial stack leaks

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This commit is contained in:
Kyle McMartin 2010-11-26 14:48:47 -05:00
parent e7fe04dcca
commit 9a17bea44f
3 changed files with 1208 additions and 0 deletions
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10
kernel.spec
View File

@ -742,6 +742,9 @@ Patch12406: posix-cpu-timers-workaround-to-suppress-problems-with-mt-exec.patch
Patch12407: hda_realtek-handle-unset-external-amp-bits.patch
Patch12410: tty-make-tiocgicount-a-handler.patch
Patch12411: tty-icount-changeover-for-other-main-devices.patch
%endif
BuildRoot: %{_tmppath}/kernel-%{KVERREL}-root
@ -1384,6 +1387,10 @@ ApplyPatch posix-cpu-timers-workaround-to-suppress-problems-with-mt-exec.patch
# rhbz#657388
ApplyPatch hda_realtek-handle-unset-external-amp-bits.patch
# CVE-2010-4077, CVE-2010-4075 (rhbz#648660, #648663)
ApplyPatch tty-make-tiocgicount-a-handler.patch
ApplyPatch tty-icount-changeover-for-other-main-devices.patch
# END OF PATCH APPLICATIONS
%endif
@ -1997,6 +2004,9 @@ fi
# || ||
%changelog
* Fri Nov 26 2010 Kyle McMartin <kyle@redhat.com>
- Plug stack leaks in tty/serial drivers. (#648663, #648660)
* Fri Nov 26 2010 Kyle McMartin <kyle@redhat.com>
- hda/realtek: handle unset external amp config (#657388)

980
tty-icount-changeover-for-other-main-devices.patch Normal file
View File

@ -0,0 +1,980 @@
From 9f13e0aa6e05b9b773f952a435afdc0b4d10e5dc Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@linux.intel.com>
Date: Thu, 16 Sep 2010 18:21:52 +0100
Subject: [PATCH 2/2] tty: icount changeover for other main devices
Again basically cut and paste
Convert the main driver set to use the hooks for GICOUNT
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
arch/ia64/hp/sim/simserial.c | 12 +------
drivers/char/amiserial.c | 56 ++++++++++++++++-------------
drivers/char/cyclades.c | 49 +++++++++++++------------
drivers/char/ip2/ip2main.c | 72 ++++++++++++++++++++++---------------
drivers/char/mxser.c | 62 ++++++++++++++++++--------------
drivers/char/nozomi.c | 37 +++++++++----------
drivers/char/pcmcia/synclink_cs.c | 60 ++++++++++++++-----------------
drivers/char/synclink.c | 73 +++++++++++++++++--------------------
drivers/char/synclink_gt.c | 55 +++++++++++++++-------------
drivers/char/synclinkmp.c | 61 ++++++++++++++-----------------
drivers/serial/68360serial.c | 51 +++++++++++++-------------
net/bluetooth/rfcomm/tty.c | 4 --
12 files changed, 297 insertions(+), 295 deletions(-)
diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c
index 1e8d71a..13633da 100644
--- a/arch/ia64/hp/sim/simserial.c
+++ b/arch/ia64/hp/sim/simserial.c
@@ -395,7 +395,7 @@ static int rs_ioctl(struct tty_struct *tty, struct file * file,
{
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
(cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
- (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
+ (cmd != TIOCMIWAIT)) {
if (tty->flags & (1 << TTY_IO_ERROR))
return -EIO;
}
@@ -433,16 +433,6 @@ static int rs_ioctl(struct tty_struct *tty, struct file * file,
case TIOCMIWAIT:
printk(KERN_INFO "rs_ioctl: TIOCMIWAIT: called\n");
return 0;
- /*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for
- * RI where only 0->1 is counted.
- */
- case TIOCGICOUNT:
- printk(KERN_INFO "rs_ioctl: TIOCGICOUNT called\n");
- return 0;
-
case TIOCSERGWILD:
case TIOCSERSWILD:
/* "setserial -W" is called in Debian boot */
diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c
index a11c8c9..b0a7046 100644
--- a/drivers/char/amiserial.c
+++ b/drivers/char/amiserial.c
@@ -1263,6 +1263,36 @@ static int rs_break(struct tty_struct *tty, int break_state)
return 0;
}
+/*
+ * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+ * Return: write counters to the user passed counter struct
+ * NB: both 1->0 and 0->1 transitions are counted except for
+ * RI where only 0->1 is counted.
+ */
+static int rs_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+{
+ struct async_struct *info = tty->driver_data;
+ struct async_icount cnow;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ cnow = info->state->icount;
+ local_irq_restore(flags);
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->frame = cnow.frame;
+ icount->overrun = cnow.overrun;
+ icount->parity = cnow.parity;
+ icount->brk = cnow.brk;
+ icount->buf_overrun = cnow.buf_overrun;
+
+ return 0;
+}
static int rs_ioctl(struct tty_struct *tty, struct file * file,
unsigned int cmd, unsigned long arg)
@@ -1332,31 +1362,6 @@ static int rs_ioctl(struct tty_struct *tty, struct file * file,
}
/* NOTREACHED */
- /*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for
- * RI where only 0->1 is counted.
- */
- case TIOCGICOUNT:
- local_irq_save(flags);
- cnow = info->state->icount;
- local_irq_restore(flags);
- icount.cts = cnow.cts;
- icount.dsr = cnow.dsr;
- icount.rng = cnow.rng;
- icount.dcd = cnow.dcd;
- icount.rx = cnow.rx;
- icount.tx = cnow.tx;
- icount.frame = cnow.frame;
- icount.overrun = cnow.overrun;
- icount.parity = cnow.parity;
- icount.brk = cnow.brk;
- icount.buf_overrun = cnow.buf_overrun;
-
- if (copy_to_user(argp, &icount, sizeof(icount)))
- return -EFAULT;
- return 0;
case TIOCSERGWILD:
case TIOCSERSWILD:
/* "setserial -W" is called in Debian boot */
@@ -1958,6 +1963,7 @@ static const struct tty_operations serial_ops = {
.wait_until_sent = rs_wait_until_sent,
.tiocmget = rs_tiocmget,
.tiocmset = rs_tiocmset,
+ .get_icount = rs_get_icount,
.proc_fops = &rs_proc_fops,
};
diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c
index 27aad94..4f152c2 100644
--- a/drivers/char/cyclades.c
+++ b/drivers/char/cyclades.c
@@ -2790,29 +2790,6 @@ cy_ioctl(struct tty_struct *tty, struct file *file,
* NB: both 1->0 and 0->1 transitions are counted except for
* RI where only 0->1 is counted.
*/
- case TIOCGICOUNT: {
- struct serial_icounter_struct sic = { };
-
- spin_lock_irqsave(&info->card->card_lock, flags);
- cnow = info->icount;
- spin_unlock_irqrestore(&info->card->card_lock, flags);
-
- sic.cts = cnow.cts;
- sic.dsr = cnow.dsr;
- sic.rng = cnow.rng;
- sic.dcd = cnow.dcd;
- sic.rx = cnow.rx;
- sic.tx = cnow.tx;
- sic.frame = cnow.frame;
- sic.overrun = cnow.overrun;
- sic.parity = cnow.parity;
- sic.brk = cnow.brk;
- sic.buf_overrun = cnow.buf_overrun;
-
- if (copy_to_user(argp, &sic, sizeof(sic)))
- ret_val = -EFAULT;
- break;
- }
default:
ret_val = -ENOIOCTLCMD;
}
@@ -2823,6 +2800,31 @@ cy_ioctl(struct tty_struct *tty, struct file *file,
return ret_val;
} /* cy_ioctl */
+static int cy_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *sic)
+{
+ struct cyclades_port *info = tty->driver_data;
+ struct cyclades_icount cnow; /* Used to snapshot */
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->card->card_lock, flags);
+ cnow = info->icount;
+ spin_unlock_irqrestore(&info->card->card_lock, flags);
+
+ sic->cts = cnow.cts;
+ sic->dsr = cnow.dsr;
+ sic->rng = cnow.rng;
+ sic->dcd = cnow.dcd;
+ sic->rx = cnow.rx;
+ sic->tx = cnow.tx;
+ sic->frame = cnow.frame;
+ sic->overrun = cnow.overrun;
+ sic->parity = cnow.parity;
+ sic->brk = cnow.brk;
+ sic->buf_overrun = cnow.buf_overrun;
+ return 0;
+}
+
/*
* This routine allows the tty driver to be notified when
* device's termios settings have changed. Note that a
@@ -4084,6 +4086,7 @@ static const struct tty_operations cy_ops = {
.wait_until_sent = cy_wait_until_sent,
.tiocmget = cy_tiocmget,
.tiocmset = cy_tiocmset,
+ .get_icount = cy_get_icount,
.proc_fops = &cyclades_proc_fops,
};
diff --git a/drivers/char/ip2/ip2main.c b/drivers/char/ip2/ip2main.c
index d4b71e8..438272c 100644
--- a/drivers/char/ip2/ip2main.c
+++ b/drivers/char/ip2/ip2main.c
@@ -183,6 +183,8 @@ static void ip2_hangup(PTTY);
static int ip2_tiocmget(struct tty_struct *tty, struct file *file);
static int ip2_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear);
+static int ip2_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount);
static void set_irq(int, int);
static void ip2_interrupt_bh(struct work_struct *work);
@@ -454,6 +456,7 @@ static const struct tty_operations ip2_ops = {
.hangup = ip2_hangup,
.tiocmget = ip2_tiocmget,
.tiocmset = ip2_tiocmset,
+ .get_icount = ip2_get_icount,
.proc_fops = &ip2_proc_fops,
};
@@ -2128,7 +2131,6 @@ ip2_ioctl ( PTTY tty, struct file *pFile, UINT cmd, ULONG arg )
i2ChanStrPtr pCh = DevTable[tty->index];
i2eBordStrPtr pB;
struct async_icount cprev, cnow; /* kernel counter temps */
- struct serial_icounter_struct __user *p_cuser;
int rc = 0;
unsigned long flags;
void __user *argp = (void __user *)arg;
@@ -2297,34 +2299,6 @@ ip2_ioctl ( PTTY tty, struct file *pFile, UINT cmd, ULONG arg )
break;
/*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for RI where
- * only 0->1 is counted. The controller is quite capable of counting
- * both, but this done to preserve compatibility with the standard
- * serial driver.
- */
- case TIOCGICOUNT:
- ip2trace (CHANN, ITRC_IOCTL, 11, 1, rc );
-
- write_lock_irqsave(&pB->read_fifo_spinlock, flags);
- cnow = pCh->icount;
- write_unlock_irqrestore(&pB->read_fifo_spinlock, flags);
- p_cuser = argp;
- rc = put_user(cnow.cts, &p_cuser->cts);
- rc = put_user(cnow.dsr, &p_cuser->dsr);
- rc = put_user(cnow.rng, &p_cuser->rng);
- rc = put_user(cnow.dcd, &p_cuser->dcd);
- rc = put_user(cnow.rx, &p_cuser->rx);
- rc = put_user(cnow.tx, &p_cuser->tx);
- rc = put_user(cnow.frame, &p_cuser->frame);
- rc = put_user(cnow.overrun, &p_cuser->overrun);
- rc = put_user(cnow.parity, &p_cuser->parity);
- rc = put_user(cnow.brk, &p_cuser->brk);
- rc = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
- break;
-
- /*
* The rest are not supported by this driver. By returning -ENOIOCTLCMD they
* will be passed to the line discipline for it to handle.
*/
@@ -2348,6 +2322,46 @@ ip2_ioctl ( PTTY tty, struct file *pFile, UINT cmd, ULONG arg )
return rc;
}
+static int ip2_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+{
+ i2ChanStrPtr pCh = DevTable[tty->index];
+ i2eBordStrPtr pB;
+ struct async_icount cnow; /* kernel counter temp */
+ unsigned long flags;
+
+ if ( pCh == NULL )
+ return -ENODEV;
+
+ pB = pCh->pMyBord;
+
+ /*
+ * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+ * Return: write counters to the user passed counter struct
+ * NB: both 1->0 and 0->1 transitions are counted except for RI where
+ * only 0->1 is counted. The controller is quite capable of counting
+ * both, but this done to preserve compatibility with the standard
+ * serial driver.
+ */
+
+ write_lock_irqsave(&pB->read_fifo_spinlock, flags);
+ cnow = pCh->icount;
+ write_unlock_irqrestore(&pB->read_fifo_spinlock, flags);
+
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->frame = cnow.frame;
+ icount->overrun = cnow.overrun;
+ icount->parity = cnow.parity;
+ icount->brk = cnow.brk;
+ icount->buf_overrun = cnow.buf_overrun;
+ return 0;
+}
+
/******************************************************************************/
/* Function: GetSerialInfo() */
/* Parameters: Pointer to channel structure */
diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index 3fc89da..b3704ae7 100644
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -1700,7 +1700,7 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
return 0;
}
- if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
+ if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT &&
test_bit(TTY_IO_ERROR, &tty->flags))
return -EIO;
@@ -1730,32 +1730,6 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
return wait_event_interruptible(info->port.delta_msr_wait,
mxser_cflags_changed(info, arg, &cnow));
- /*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for
- * RI where only 0->1 is counted.
- */
- case TIOCGICOUNT: {
- struct serial_icounter_struct icnt = { 0 };
- spin_lock_irqsave(&info->slock, flags);
- cnow = info->icount;
- spin_unlock_irqrestore(&info->slock, flags);
-
- icnt.frame = cnow.frame;
- icnt.brk = cnow.brk;
- icnt.overrun = cnow.overrun;
- icnt.buf_overrun = cnow.buf_overrun;
- icnt.parity = cnow.parity;
- icnt.rx = cnow.rx;
- icnt.tx = cnow.tx;
- icnt.cts = cnow.cts;
- icnt.dsr = cnow.dsr;
- icnt.rng = cnow.rng;
- icnt.dcd = cnow.dcd;
-
- return copy_to_user(argp, &icnt, sizeof(icnt)) ? -EFAULT : 0;
- }
case MOXA_HighSpeedOn:
return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
case MOXA_SDS_RSTICOUNTER:
@@ -1828,6 +1802,39 @@ static int mxser_ioctl(struct tty_struct *tty, struct file *file,
return 0;
}
+ /*
+ * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+ * Return: write counters to the user passed counter struct
+ * NB: both 1->0 and 0->1 transitions are counted except for
+ * RI where only 0->1 is counted.
+ */
+
+static int mxser_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+
+{
+ struct mxser_port *info = tty->driver_data;
+ struct async_icount cnow;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->slock, flags);
+ cnow = info->icount;
+ spin_unlock_irqrestore(&info->slock, flags);
+
+ icount->frame = cnow.frame;
+ icount->brk = cnow.brk;
+ icount->overrun = cnow.overrun;
+ icount->buf_overrun = cnow.buf_overrun;
+ icount->parity = cnow.parity;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ return 0;
+}
+
static void mxser_stoprx(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
@@ -2326,6 +2333,7 @@ static const struct tty_operations mxser_ops = {
.wait_until_sent = mxser_wait_until_sent,
.tiocmget = mxser_tiocmget,
.tiocmset = mxser_tiocmset,
+ .get_icount = mxser_get_icount,
};
struct tty_port_operations mxser_port_ops = {
diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c
index 817169c..dd3f9b1 100644
--- a/drivers/char/nozomi.c
+++ b/drivers/char/nozomi.c
@@ -1804,24 +1804,24 @@ static int ntty_cflags_changed(struct port *port, unsigned long flags,
return ret;
}
-static int ntty_ioctl_tiocgicount(struct port *port, void __user *argp)
+static int ntty_tiocgicount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
{
+ struct port *port = tty->driver_data;
const struct async_icount cnow = port->tty_icount;
- struct serial_icounter_struct icount;
-
- icount.cts = cnow.cts;
- icount.dsr = cnow.dsr;
- icount.rng = cnow.rng;
- icount.dcd = cnow.dcd;
- icount.rx = cnow.rx;
- icount.tx = cnow.tx;
- icount.frame = cnow.frame;
- icount.overrun = cnow.overrun;
- icount.parity = cnow.parity;
- icount.brk = cnow.brk;
- icount.buf_overrun = cnow.buf_overrun;
-
- return copy_to_user(argp, &icount, sizeof(icount)) ? -EFAULT : 0;
+
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->frame = cnow.frame;
+ icount->overrun = cnow.overrun;
+ icount->parity = cnow.parity;
+ icount->brk = cnow.brk;
+ icount->buf_overrun = cnow.buf_overrun;
+ return 0;
}
static int ntty_ioctl(struct tty_struct *tty, struct file *file,
@@ -1840,9 +1840,7 @@ static int ntty_ioctl(struct tty_struct *tty, struct file *file,
rval = wait_event_interruptible(port->tty_wait,
ntty_cflags_changed(port, arg, &cprev));
break;
- } case TIOCGICOUNT:
- rval = ntty_ioctl_tiocgicount(port, argp);
- break;
+ }
default:
DBG1("ERR: 0x%08X, %d", cmd, cmd);
break;
@@ -1922,6 +1920,7 @@ static const struct tty_operations tty_ops = {
.chars_in_buffer = ntty_chars_in_buffer,
.tiocmget = ntty_tiocmget,
.tiocmset = ntty_tiocmset,
+ .get_icount = ntty_tiocgicount,
.install = ntty_install,
.cleanup = ntty_cleanup,
};
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index 45f9fad..7404809 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -2215,6 +2215,32 @@ static int mgslpc_break(struct tty_struct *tty, int break_state)
return 0;
}
+static int mgslpc_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+{
+ MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
+ struct mgsl_icount cnow; /* kernel counter temps */
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock,flags);
+ cnow = info->icount;
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->frame = cnow.frame;
+ icount->overrun = cnow.overrun;
+ icount->parity = cnow.parity;
+ icount->brk = cnow.brk;
+ icount->buf_overrun = cnow.buf_overrun;
+
+ return 0;
+}
+
/* Service an IOCTL request
*
* Arguments:
@@ -2230,11 +2256,7 @@ static int mgslpc_ioctl(struct tty_struct *tty, struct file * file,
unsigned int cmd, unsigned long arg)
{
MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
- int error;
- struct mgsl_icount cnow; /* kernel counter temps */
- struct serial_icounter_struct __user *p_cuser; /* user space */
void __user *argp = (void __user *)arg;
- unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__,__LINE__,
@@ -2244,7 +2266,7 @@ static int mgslpc_ioctl(struct tty_struct *tty, struct file * file,
return -ENODEV;
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
- (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
+ (cmd != TIOCMIWAIT)) {
if (tty->flags & (1 << TTY_IO_ERROR))
return -EIO;
}
@@ -2274,34 +2296,6 @@ static int mgslpc_ioctl(struct tty_struct *tty, struct file * file,
return wait_events(info, argp);
case TIOCMIWAIT:
return modem_input_wait(info,(int)arg);
- case TIOCGICOUNT:
- spin_lock_irqsave(&info->lock,flags);
- cnow = info->icount;
- spin_unlock_irqrestore(&info->lock,flags);
- p_cuser = argp;
- PUT_USER(error,cnow.cts, &p_cuser->cts);
- if (error) return error;
- PUT_USER(error,cnow.dsr, &p_cuser->dsr);
- if (error) return error;
- PUT_USER(error,cnow.rng, &p_cuser->rng);
- if (error) return error;
- PUT_USER(error,cnow.dcd, &p_cuser->dcd);
- if (error) return error;
- PUT_USER(error,cnow.rx, &p_cuser->rx);
- if (error) return error;
- PUT_USER(error,cnow.tx, &p_cuser->tx);
- if (error) return error;
- PUT_USER(error,cnow.frame, &p_cuser->frame);
- if (error) return error;
- PUT_USER(error,cnow.overrun, &p_cuser->overrun);
- if (error) return error;
- PUT_USER(error,cnow.parity, &p_cuser->parity);
- if (error) return error;
- PUT_USER(error,cnow.brk, &p_cuser->brk);
- if (error) return error;
- PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun);
- if (error) return error;
- return 0;
default:
return -ENOIOCTLCMD;
}
diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c
index a2a5800..3a6824f 100644
--- a/drivers/char/synclink.c
+++ b/drivers/char/synclink.c
@@ -2925,6 +2925,38 @@ static int mgsl_break(struct tty_struct *tty, int break_state)
} /* end of mgsl_break() */
+/*
+ * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+ * Return: write counters to the user passed counter struct
+ * NB: both 1->0 and 0->1 transitions are counted except for
+ * RI where only 0->1 is counted.
+ */
+static int msgl_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+
+{
+ struct mgsl_struct * info = tty->driver_data;
+ struct mgsl_icount cnow; /* kernel counter temps */
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->irq_spinlock,flags);
+ cnow = info->icount;
+ spin_unlock_irqrestore(&info->irq_spinlock,flags);
+
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->frame = cnow.frame;
+ icount->overrun = cnow.overrun;
+ icount->parity = cnow.parity;
+ icount->brk = cnow.brk;
+ icount->buf_overrun = cnow.buf_overrun;
+ return 0;
+}
+
/* mgsl_ioctl() Service an IOCTL request
*
* Arguments:
@@ -2949,7 +2981,7 @@ static int mgsl_ioctl(struct tty_struct *tty, struct file * file,
return -ENODEV;
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
- (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
+ (cmd != TIOCMIWAIT)) {
if (tty->flags & (1 << TTY_IO_ERROR))
return -EIO;
}
@@ -2959,11 +2991,7 @@ static int mgsl_ioctl(struct tty_struct *tty, struct file * file,
static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigned long arg)
{
- int error;
- struct mgsl_icount cnow; /* kernel counter temps */
void __user *argp = (void __user *)arg;
- struct serial_icounter_struct __user *p_cuser; /* user space */
- unsigned long flags;
switch (cmd) {
case MGSL_IOCGPARAMS:
@@ -2992,40 +3020,6 @@ static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigne
case TIOCMIWAIT:
return modem_input_wait(info,(int)arg);
- /*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for
- * RI where only 0->1 is counted.
- */
- case TIOCGICOUNT:
- spin_lock_irqsave(&info->irq_spinlock,flags);
- cnow = info->icount;
- spin_unlock_irqrestore(&info->irq_spinlock,flags);
- p_cuser = argp;
- PUT_USER(error,cnow.cts, &p_cuser->cts);
- if (error) return error;
- PUT_USER(error,cnow.dsr, &p_cuser->dsr);
- if (error) return error;
- PUT_USER(error,cnow.rng, &p_cuser->rng);
- if (error) return error;
- PUT_USER(error,cnow.dcd, &p_cuser->dcd);
- if (error) return error;
- PUT_USER(error,cnow.rx, &p_cuser->rx);
- if (error) return error;
- PUT_USER(error,cnow.tx, &p_cuser->tx);
- if (error) return error;
- PUT_USER(error,cnow.frame, &p_cuser->frame);
- if (error) return error;
- PUT_USER(error,cnow.overrun, &p_cuser->overrun);
- if (error) return error;
- PUT_USER(error,cnow.parity, &p_cuser->parity);
- if (error) return error;
- PUT_USER(error,cnow.brk, &p_cuser->brk);
- if (error) return error;
- PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun);
- if (error) return error;
- return 0;
default:
return -ENOIOCTLCMD;
}
@@ -4328,6 +4322,7 @@ static const struct tty_operations mgsl_ops = {
.hangup = mgsl_hangup,
.tiocmget = tiocmget,
.tiocmset = tiocmset,
+ .get_icount = msgl_get_icount,
.proc_fops = &mgsl_proc_fops,
};
diff --git a/drivers/char/synclink_gt.c b/drivers/char/synclink_gt.c
index e63b830..1746d91 100644
--- a/drivers/char/synclink_gt.c
+++ b/drivers/char/synclink_gt.c
@@ -1032,9 +1032,6 @@ static int ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct slgt_info *info = tty->driver_data;
- struct mgsl_icount cnow; /* kernel counter temps */
- struct serial_icounter_struct __user *p_cuser; /* user space */
- unsigned long flags;
void __user *argp = (void __user *)arg;
int ret;
@@ -1043,7 +1040,7 @@ static int ioctl(struct tty_struct *tty, struct file *file,
DBGINFO(("%s ioctl() cmd=%08X\n", info->device_name, cmd));
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
- (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
+ (cmd != TIOCMIWAIT)) {
if (tty->flags & (1 << TTY_IO_ERROR))
return -EIO;
}
@@ -1053,24 +1050,6 @@ static int ioctl(struct tty_struct *tty, struct file *file,
return wait_mgsl_event(info, argp);
case TIOCMIWAIT:
return modem_input_wait(info,(int)arg);
- case TIOCGICOUNT:
- spin_lock_irqsave(&info->lock,flags);
- cnow = info->icount;
- spin_unlock_irqrestore(&info->lock,flags);
- p_cuser = argp;
- if (put_user(cnow.cts, &p_cuser->cts) ||
- put_user(cnow.dsr, &p_cuser->dsr) ||
- put_user(cnow.rng, &p_cuser->rng) ||
- put_user(cnow.dcd, &p_cuser->dcd) ||
- put_user(cnow.rx, &p_cuser->rx) ||
- put_user(cnow.tx, &p_cuser->tx) ||
- put_user(cnow.frame, &p_cuser->frame) ||
- put_user(cnow.overrun, &p_cuser->overrun) ||
- put_user(cnow.parity, &p_cuser->parity) ||
- put_user(cnow.brk, &p_cuser->brk) ||
- put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
- return -EFAULT;
- return 0;
case MGSL_IOCSGPIO:
return set_gpio(info, argp);
case MGSL_IOCGGPIO:
@@ -1117,6 +1096,33 @@ static int ioctl(struct tty_struct *tty, struct file *file,
return ret;
}
+static int get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+
+{
+ struct slgt_info *info = tty->driver_data;
+ struct mgsl_icount cnow; /* kernel counter temps */
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock,flags);
+ cnow = info->icount;
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->frame = cnow.frame;
+ icount->overrun = cnow.overrun;
+ icount->parity = cnow.parity;
+ icount->brk = cnow.brk;
+ icount->buf_overrun = cnow.buf_overrun;
+
+ return 0;
+}
+
/*
* support for 32 bit ioctl calls on 64 bit systems
*/
@@ -1206,10 +1212,6 @@ static long slgt_compat_ioctl(struct tty_struct *tty, struct file *file,
case MGSL_IOCSGPIO:
case MGSL_IOCGGPIO:
case MGSL_IOCWAITGPIO:
- case TIOCGICOUNT:
- rc = ioctl(tty, file, cmd, (unsigned long)(compat_ptr(arg)));
- break;
-
case MGSL_IOCSTXIDLE:
case MGSL_IOCTXENABLE:
case MGSL_IOCRXENABLE:
@@ -3642,6 +3644,7 @@ static const struct tty_operations ops = {
.hangup = hangup,
.tiocmget = tiocmget,
.tiocmset = tiocmset,
+ .get_icount = get_icount,
.proc_fops = &synclink_gt_proc_fops,
};
diff --git a/drivers/char/synclinkmp.c b/drivers/char/synclinkmp.c
index e56caf7..2f9eb4b 100644
--- a/drivers/char/synclinkmp.c
+++ b/drivers/char/synclinkmp.c
@@ -1258,10 +1258,6 @@ static int ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
SLMP_INFO *info = tty->driver_data;
- int error;
- struct mgsl_icount cnow; /* kernel counter temps */
- struct serial_icounter_struct __user *p_cuser; /* user space */
- unsigned long flags;
void __user *argp = (void __user *)arg;
if (debug_level >= DEBUG_LEVEL_INFO)
@@ -1272,7 +1268,7 @@ static int ioctl(struct tty_struct *tty, struct file *file,
return -ENODEV;
if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
- (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
+ (cmd != TIOCMIWAIT)) {
if (tty->flags & (1 << TTY_IO_ERROR))
return -EIO;
}
@@ -1310,40 +1306,38 @@ static int ioctl(struct tty_struct *tty, struct file *file,
* NB: both 1->0 and 0->1 transitions are counted except for
* RI where only 0->1 is counted.
*/
- case TIOCGICOUNT:
- spin_lock_irqsave(&info->lock,flags);
- cnow = info->icount;
- spin_unlock_irqrestore(&info->lock,flags);
- p_cuser = argp;
- PUT_USER(error,cnow.cts, &p_cuser->cts);
- if (error) return error;
- PUT_USER(error,cnow.dsr, &p_cuser->dsr);
- if (error) return error;
- PUT_USER(error,cnow.rng, &p_cuser->rng);
- if (error) return error;
- PUT_USER(error,cnow.dcd, &p_cuser->dcd);
- if (error) return error;
- PUT_USER(error,cnow.rx, &p_cuser->rx);
- if (error) return error;
- PUT_USER(error,cnow.tx, &p_cuser->tx);
- if (error) return error;
- PUT_USER(error,cnow.frame, &p_cuser->frame);
- if (error) return error;
- PUT_USER(error,cnow.overrun, &p_cuser->overrun);
- if (error) return error;
- PUT_USER(error,cnow.parity, &p_cuser->parity);
- if (error) return error;
- PUT_USER(error,cnow.brk, &p_cuser->brk);
- if (error) return error;
- PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun);
- if (error) return error;
- return 0;
default:
return -ENOIOCTLCMD;
}
return 0;
}
+static int get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+{
+ SLMP_INFO *info = tty->driver_data;
+ struct mgsl_icount cnow; /* kernel counter temps */
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock,flags);
+ cnow = info->icount;
+ spin_unlock_irqrestore(&info->lock,flags);
+
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->frame = cnow.frame;
+ icount->overrun = cnow.overrun;
+ icount->parity = cnow.parity;
+ icount->brk = cnow.brk;
+ icount->buf_overrun = cnow.buf_overrun;
+
+ return 0;
+}
+
/*
* /proc fs routines....
*/
@@ -3909,6 +3903,7 @@ static const struct tty_operations ops = {
.hangup = hangup,
.tiocmget = tiocmget,
.tiocmset = tiocmset,
+ .get_icount = get_icount,
.proc_fops = &synclinkmp_proc_fops,
};
diff --git a/drivers/serial/68360serial.c b/drivers/serial/68360serial.c
index 0dff3bb..88b1335 100644
--- a/drivers/serial/68360serial.c
+++ b/drivers/serial/68360serial.c
@@ -1381,6 +1381,30 @@ static void send_break(ser_info_t *info, unsigned int duration)
}
+/*
+ * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+ * Return: write counters to the user passed counter struct
+ * NB: both 1->0 and 0->1 transitions are counted except for
+ * RI where only 0->1 is counted.
+ */
+static int rs_360_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+{
+ ser_info_t *info = (ser_info_t *)tty->driver_data;
+ struct async_icount cnow;
+
+ local_irq_disable();
+ cnow = info->state->icount;
+ local_irq_enable();
+
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+
+ return 0;
+}
+
static int rs_360_ioctl(struct tty_struct *tty, struct file * file,
unsigned int cmd, unsigned long arg)
{
@@ -1394,7 +1418,7 @@ static int rs_360_ioctl(struct tty_struct *tty, struct file * file,
if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
return -ENODEV;
- if ((cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
+ if (cmd != TIOCMIWAIT) {
if (tty->flags & (1 << TTY_IO_ERROR))
return -EIO;
}
@@ -1477,31 +1501,6 @@ static int rs_360_ioctl(struct tty_struct *tty, struct file * file,
return 0;
#endif
- /*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for
- * RI where only 0->1 is counted.
- */
- case TIOCGICOUNT:
- local_irq_disable();
- cnow = info->state->icount;
- local_irq_enable();
- p_cuser = (struct serial_icounter_struct *) arg;
-/* error = put_user(cnow.cts, &p_cuser->cts); */
-/* if (error) return error; */
-/* error = put_user(cnow.dsr, &p_cuser->dsr); */
-/* if (error) return error; */
-/* error = put_user(cnow.rng, &p_cuser->rng); */
-/* if (error) return error; */
-/* error = put_user(cnow.dcd, &p_cuser->dcd); */
-/* if (error) return error; */
-
- put_user(cnow.cts, &p_cuser->cts);
- put_user(cnow.dsr, &p_cuser->dsr);
- put_user(cnow.rng, &p_cuser->rng);
- put_user(cnow.dcd, &p_cuser->dcd);
- return 0;
default:
return -ENOIOCTLCMD;
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index befc3a5..84c2a4d 100644
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -844,10 +844,6 @@ static int rfcomm_tty_ioctl(struct tty_struct *tty, struct file *filp, unsigned
BT_DBG("TIOCMIWAIT");
break;
- case TIOCGICOUNT:
- BT_DBG("TIOCGICOUNT");
- break;
-
case TIOCGSERIAL:
BT_ERR("TIOCGSERIAL is not supported");
return -ENOIOCTLCMD;
--
1.7.3.2

218
tty-make-tiocgicount-a-handler.patch Normal file
View File

@ -0,0 +1,218 @@
From e2047e3ffc61042a3228cd4228cd95ab0dad1d72 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@linux.intel.com>
Date: Thu, 16 Sep 2010 18:21:24 +0100
Subject: [PATCH 1/2] tty: Make tiocgicount a handler
Dan Rosenberg noted that various drivers return the struct with uncleared
fields. Instead of spending forever trying to stomp all the drivers that
get it wrong (and every new driver) do the job in one place.
This first patch adds the needed operations and hooks them up, including
the needed USB midlayer and serial core plumbing.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/char/tty_io.c | 21 +++++++++++++++++++++
drivers/serial/serial_core.c | 37 +++++++++++++++++--------------------
drivers/usb/serial/usb-serial.c | 13 +++++++++++++
include/linux/tty_driver.h | 9 +++++++++
include/linux/usb/serial.h | 2 ++
5 files changed, 62 insertions(+), 20 deletions(-)
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 613c852..68d7713 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -96,6 +96,7 @@
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
+#include <linux/serial.h>
#include <linux/uaccess.h>
#include <asm/system.h>
@@ -2502,6 +2503,20 @@ static int tty_tiocmset(struct tty_struct *tty, struct file *file, unsigned int
return tty->ops->tiocmset(tty, file, set, clear);
}
+static int tty_tiocgicount(struct tty_struct *tty, void __user *arg)
+{
+ int retval = -EINVAL;
+ struct serial_icounter_struct icount;
+ memset(&icount, 0, sizeof(icount));
+ if (tty->ops->get_icount)
+ retval = tty->ops->get_icount(tty, &icount);
+ if (retval != 0)
+ return retval;
+ if (copy_to_user(arg, &icount, sizeof(icount)))
+ return -EFAULT;
+ return 0;
+}
+
struct tty_struct *tty_pair_get_tty(struct tty_struct *tty)
{
if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&
@@ -2622,6 +2637,12 @@ long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case TIOCMBIC:
case TIOCMBIS:
return tty_tiocmset(tty, file, cmd, p);
+ case TIOCGICOUNT:
+ retval = tty_tiocgicount(tty, p);
+ /* For the moment allow fall through to the old method */
+ if (retval != -EINVAL)
+ return retval;
+ break;
case TCFLSH:
switch (arg) {
case TCIFLUSH:
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index cd85112..2ee0aec 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -1074,10 +1074,10 @@ uart_wait_modem_status(struct uart_state *state, unsigned long arg)
* NB: both 1->0 and 0->1 transitions are counted except for
* RI where only 0->1 is counted.
*/
-static int uart_get_count(struct uart_state *state,
- struct serial_icounter_struct __user *icnt)
+static int uart_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
{
- struct serial_icounter_struct icount;
+ struct uart_state *state = tty->driver_data;
struct uart_icount cnow;
struct uart_port *uport = state->uart_port;
@@ -1085,19 +1085,19 @@ static int uart_get_count(struct uart_state *state,
memcpy(&cnow, &uport->icount, sizeof(struct uart_icount));
spin_unlock_irq(&uport->lock);
- icount.cts = cnow.cts;
- icount.dsr = cnow.dsr;
- icount.rng = cnow.rng;
- icount.dcd = cnow.dcd;
- icount.rx = cnow.rx;
- icount.tx = cnow.tx;
- icount.frame = cnow.frame;
- icount.overrun = cnow.overrun;
- icount.parity = cnow.parity;
- icount.brk = cnow.brk;
- icount.buf_overrun = cnow.buf_overrun;
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->frame = cnow.frame;
+ icount->overrun = cnow.overrun;
+ icount->parity = cnow.parity;
+ icount->brk = cnow.brk;
+ icount->buf_overrun = cnow.buf_overrun;
- return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
+ return 0;
}
/*
@@ -1150,10 +1150,6 @@ uart_ioctl(struct tty_struct *tty, struct file *filp, unsigned int cmd,
case TIOCMIWAIT:
ret = uart_wait_modem_status(state, arg);
break;
-
- case TIOCGICOUNT:
- ret = uart_get_count(state, uarg);
- break;
}
if (ret != -ENOIOCTLCMD)
@@ -2283,6 +2279,7 @@ static const struct tty_operations uart_ops = {
#endif
.tiocmget = uart_tiocmget,
.tiocmset = uart_tiocmset,
+ .get_icount = uart_get_icount,
#ifdef CONFIG_CONSOLE_POLL
.poll_init = uart_poll_init,
.poll_get_char = uart_poll_get_char,
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 7a2177c..e64da74 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -519,6 +519,18 @@ static int serial_tiocmset(struct tty_struct *tty, struct file *file,
return -EINVAL;
}
+static int serial_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+{
+ struct usb_serial_port *port = tty->driver_data;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ if (port->serial->type->get_icount)
+ return port->serial->type->get_icount(tty, icount);
+ return -EINVAL;
+}
+
/*
* We would be calling tty_wakeup here, but unfortunately some line
* disciplines have an annoying habit of calling tty->write from
@@ -1195,6 +1207,7 @@ static const struct tty_operations serial_ops = {
.chars_in_buffer = serial_chars_in_buffer,
.tiocmget = serial_tiocmget,
.tiocmset = serial_tiocmset,
+ .get_icount = serial_get_icount,
.cleanup = serial_cleanup,
.install = serial_install,
.proc_fops = &serial_proc_fops,
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index b086779..db2d227 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -224,6 +224,12 @@
* unless the tty also has a valid tty->termiox pointer.
*
* Optional: Called under the termios lock
+ *
+ * int (*get_icount)(struct tty_struct *tty, struct serial_icounter *icount);
+ *
+ * Called when the device receives a TIOCGICOUNT ioctl. Passed a kernel
+ * structure to complete. This method is optional and will only be called
+ * if provided (otherwise EINVAL will be returned).
*/
#include <linux/fs.h>
@@ -232,6 +238,7 @@
struct tty_struct;
struct tty_driver;
+struct serial_icounter_struct;
struct tty_operations {
struct tty_struct * (*lookup)(struct tty_driver *driver,
@@ -268,6 +275,8 @@ struct tty_operations {
unsigned int set, unsigned int clear);
int (*resize)(struct tty_struct *tty, struct winsize *ws);
int (*set_termiox)(struct tty_struct *tty, struct termiox *tnew);
+ int (*get_icount)(struct tty_struct *tty,
+ struct serial_icounter_struct *icount);
#ifdef CONFIG_CONSOLE_POLL
int (*poll_init)(struct tty_driver *driver, int line, char *options);
int (*poll_get_char)(struct tty_driver *driver, int line);
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index 55675b1..16d682f 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -271,6 +271,8 @@ struct usb_serial_driver {
int (*tiocmget)(struct tty_struct *tty, struct file *file);
int (*tiocmset)(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear);
+ int (*get_icount)(struct tty_struct *tty,
+ struct serial_icounter_struct *icount);
/* Called by the tty layer for port level work. There may or may not
be an attached tty at this point */
void (*dtr_rts)(struct usb_serial_port *port, int on);
--
1.7.3.2