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authorLinus Torvalds <torvalds@linux-foundation.org>2012-03-20 11:24:39 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-20 11:24:39 -0700
commit843ec558f91b8e8fdb6efc908f2c0506407cc750 (patch)
tree1866dccbc298390fc8686875942324075fd83f9d /drivers/isdn
parent71e7ff2578c3bc67fd893a9ba7f69fd563f271de (diff)
parentfb8ebec00b04f921ea1614a7303f1a8e5e9e47c5 (diff)
Merge tag 'tty-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull TTY/serial patches from Greg KH: "tty and serial merge for 3.4-rc1 Here's the big serial and tty merge for the 3.4-rc1 tree. There's loads of fixes and reworks in here from Jiri for the tty layer, and a number of patches from Alan to help try to wrestle the vt layer into a sane model. Other than that, lots of driver updates and fixes, and other minor stuff, all detailed in the shortlog." * tag 'tty-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (132 commits) serial: pxa: add clk_prepare/clk_unprepare calls TTY: Wrong unicode value copied in con_set_unimap() serial: PL011: clear pending interrupts serial: bfin-uart: Don't access tty circular buffer in TX DMA interrupt after it is reset. vt: NULL dereference in vt_do_kdsk_ioctl() tty: serial: vt8500: fix annotations for probe/remove serial: remove back and forth conversions in serial_out_sync serial: use serial_port_in/out vs serial_in/out in 8250 serial: introduce generic port in/out helpers serial: reduce number of indirections in 8250 code serial: delete useless void casts in 8250.c serial: make 8250's serial_in shareable to other drivers. serial: delete last unused traces of pausing I/O in 8250 pch_uart: Add module parameter descriptions pch_uart: Use existing default_baud in setup_console pch_uart: Add user_uartclk parameter pch_uart: Add Fish River Island II uart clock quirks pch_uart: Use uartclk instead of base_baud mpc5200b/uart: select more tolerant uart prescaler on low baudrates tty: moxa: fix bit test in moxa_start() ...
Diffstat (limited to 'drivers/isdn')
-rw-r--r--drivers/isdn/capi/capi.c13
-rw-r--r--drivers/isdn/gigaset/common.c5
-rw-r--r--drivers/isdn/gigaset/gigaset.h3
-rw-r--r--drivers/isdn/gigaset/interface.c158
-rw-r--r--drivers/isdn/i4l/isdn_tty.c7
5 files changed, 42 insertions, 144 deletions
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
index e44933d58790..3a7905b06e53 100644
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -1013,16 +1013,12 @@ static const struct file_operations capi_fops =
static int
capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty)
{
- int idx = tty->index;
- struct capiminor *mp = capiminor_get(idx);
- int ret = tty_init_termios(tty);
+ struct capiminor *mp = capiminor_get(tty->index);
+ int ret = tty_standard_install(driver, tty);
- if (ret == 0) {
- tty_driver_kref_get(driver);
- tty->count++;
+ if (ret == 0)
tty->driver_data = mp;
- driver->ttys[idx] = tty;
- } else
+ else
capiminor_put(mp);
return ret;
}
@@ -1290,7 +1286,6 @@ static int __init capinc_tty_init(void)
kfree(capiminors);
return -ENOMEM;
}
- drv->owner = THIS_MODULE;
drv->driver_name = "capi_nc";
drv->name = "capi";
drv->major = 0;
diff --git a/drivers/isdn/gigaset/common.c b/drivers/isdn/gigaset/common.c
index db621db67f61..880f6ef0e18d 100644
--- a/drivers/isdn/gigaset/common.c
+++ b/drivers/isdn/gigaset/common.c
@@ -720,12 +720,11 @@ struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
tasklet_init(&cs->event_tasklet, gigaset_handle_event,
(unsigned long) cs);
+ tty_port_init(&cs->port);
cs->commands_pending = 0;
cs->cur_at_seq = 0;
cs->gotfwver = -1;
- cs->open_count = 0;
cs->dev = NULL;
- cs->tty = NULL;
cs->tty_dev = NULL;
cs->cidmode = cidmode != 0;
cs->tabnocid = gigaset_tab_nocid;
@@ -1051,8 +1050,6 @@ static struct cardstate *gigaset_get_cs_by_minor(unsigned minor)
struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty)
{
- if (tty->index < 0 || tty->index >= tty->driver->num)
- return NULL;
return gigaset_get_cs_by_minor(tty->index + tty->driver->minor_start);
}
diff --git a/drivers/isdn/gigaset/gigaset.h b/drivers/isdn/gigaset/gigaset.h
index 212efaf9a4e4..f877726d664b 100644
--- a/drivers/isdn/gigaset/gigaset.h
+++ b/drivers/isdn/gigaset/gigaset.h
@@ -433,8 +433,7 @@ struct cardstate {
spinlock_t cmdlock;
unsigned curlen, cmdbytes;
- unsigned open_count;
- struct tty_struct *tty;
+ struct tty_port port;
struct tasklet_struct if_wake_tasklet;
unsigned control_state;
diff --git a/drivers/isdn/gigaset/interface.c b/drivers/isdn/gigaset/interface.c
index ee0a549a933a..8f8814afce86 100644
--- a/drivers/isdn/gigaset/interface.c
+++ b/drivers/isdn/gigaset/interface.c
@@ -146,13 +146,10 @@ static const struct tty_operations if_ops = {
static int if_open(struct tty_struct *tty, struct file *filp)
{
struct cardstate *cs;
- unsigned long flags;
gig_dbg(DEBUG_IF, "%d+%d: %s()",
tty->driver->minor_start, tty->index, __func__);
- tty->driver_data = NULL;
-
cs = gigaset_get_cs_by_tty(tty);
if (!cs || !try_module_get(cs->driver->owner))
return -ENODEV;
@@ -163,12 +160,10 @@ static int if_open(struct tty_struct *tty, struct file *filp)
}
tty->driver_data = cs;
- ++cs->open_count;
+ ++cs->port.count;
- if (cs->open_count == 1) {
- spin_lock_irqsave(&cs->lock, flags);
- cs->tty = tty;
- spin_unlock_irqrestore(&cs->lock, flags);
+ if (cs->port.count == 1) {
+ tty_port_tty_set(&cs->port, tty);
tty->low_latency = 1;
}
@@ -178,12 +173,10 @@ static int if_open(struct tty_struct *tty, struct file *filp)
static void if_close(struct tty_struct *tty, struct file *filp)
{
- struct cardstate *cs;
- unsigned long flags;
+ struct cardstate *cs = tty->driver_data;
- cs = (struct cardstate *) tty->driver_data;
- if (!cs) {
- pr_err("%s: no cardstate\n", __func__);
+ if (!cs) { /* happens if we didn't find cs in open */
+ printk(KERN_DEBUG "%s: no cardstate\n", __func__);
return;
}
@@ -193,15 +186,10 @@ static void if_close(struct tty_struct *tty, struct file *filp)
if (!cs->connected)
gig_dbg(DEBUG_IF, "not connected"); /* nothing to do */
- else if (!cs->open_count)
+ else if (!cs->port.count)
dev_warn(cs->dev, "%s: device not opened\n", __func__);
- else {
- if (!--cs->open_count) {
- spin_lock_irqsave(&cs->lock, flags);
- cs->tty = NULL;
- spin_unlock_irqrestore(&cs->lock, flags);
- }
- }
+ else if (!--cs->port.count)
+ tty_port_tty_set(&cs->port, NULL);
mutex_unlock(&cs->mutex);
@@ -211,18 +199,12 @@ static void if_close(struct tty_struct *tty, struct file *filp)
static int if_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg)
{
- struct cardstate *cs;
+ struct cardstate *cs = tty->driver_data;
int retval = -ENODEV;
int int_arg;
unsigned char buf[6];
unsigned version[4];
- cs = (struct cardstate *) tty->driver_data;
- if (!cs) {
- pr_err("%s: no cardstate\n", __func__);
- return -ENODEV;
- }
-
gig_dbg(DEBUG_IF, "%u: %s(0x%x)", cs->minor_index, __func__, cmd);
if (mutex_lock_interruptible(&cs->mutex))
@@ -231,9 +213,7 @@ static int if_ioctl(struct tty_struct *tty,
if (!cs->connected) {
gig_dbg(DEBUG_IF, "not connected");
retval = -ENODEV;
- } else if (!cs->open_count)
- dev_warn(cs->dev, "%s: device not opened\n", __func__);
- else {
+ } else {
retval = 0;
switch (cmd) {
case GIGASET_REDIR:
@@ -285,15 +265,9 @@ static int if_ioctl(struct tty_struct *tty,
static int if_tiocmget(struct tty_struct *tty)
{
- struct cardstate *cs;
+ struct cardstate *cs = tty->driver_data;
int retval;
- cs = (struct cardstate *) tty->driver_data;
- if (!cs) {
- pr_err("%s: no cardstate\n", __func__);
- return -ENODEV;
- }
-
gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
if (mutex_lock_interruptible(&cs->mutex))
@@ -309,16 +283,10 @@ static int if_tiocmget(struct tty_struct *tty)
static int if_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear)
{
- struct cardstate *cs;
+ struct cardstate *cs = tty->driver_data;
int retval;
unsigned mc;
- cs = (struct cardstate *) tty->driver_data;
- if (!cs) {
- pr_err("%s: no cardstate\n", __func__);
- return -ENODEV;
- }
-
gig_dbg(DEBUG_IF, "%u: %s(0x%x, 0x%x)",
cs->minor_index, __func__, set, clear);
@@ -341,16 +309,10 @@ static int if_tiocmset(struct tty_struct *tty,
static int if_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
- struct cardstate *cs;
+ struct cardstate *cs = tty->driver_data;
struct cmdbuf_t *cb;
int retval;
- cs = (struct cardstate *) tty->driver_data;
- if (!cs) {
- pr_err("%s: no cardstate\n", __func__);
- return -ENODEV;
- }
-
gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
if (mutex_lock_interruptible(&cs->mutex))
@@ -361,11 +323,6 @@ static int if_write(struct tty_struct *tty, const unsigned char *buf, int count)
retval = -ENODEV;
goto done;
}
- if (!cs->open_count) {
- dev_warn(cs->dev, "%s: device not opened\n", __func__);
- retval = -ENODEV;
- goto done;
- }
if (cs->mstate != MS_LOCKED) {
dev_warn(cs->dev, "can't write to unlocked device\n");
retval = -EBUSY;
@@ -397,15 +354,9 @@ done:
static int if_write_room(struct tty_struct *tty)
{
- struct cardstate *cs;
+ struct cardstate *cs = tty->driver_data;
int retval = -ENODEV;
- cs = (struct cardstate *) tty->driver_data;
- if (!cs) {
- pr_err("%s: no cardstate\n", __func__);
- return -ENODEV;
- }
-
gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
if (mutex_lock_interruptible(&cs->mutex))
@@ -414,9 +365,7 @@ static int if_write_room(struct tty_struct *tty)
if (!cs->connected) {
gig_dbg(DEBUG_IF, "not connected");
retval = -ENODEV;
- } else if (!cs->open_count)
- dev_warn(cs->dev, "%s: device not opened\n", __func__);
- else if (cs->mstate != MS_LOCKED) {
+ } else if (cs->mstate != MS_LOCKED) {
dev_warn(cs->dev, "can't write to unlocked device\n");
retval = -EBUSY;
} else
@@ -429,23 +378,15 @@ static int if_write_room(struct tty_struct *tty)
static int if_chars_in_buffer(struct tty_struct *tty)
{
- struct cardstate *cs;
+ struct cardstate *cs = tty->driver_data;
int retval = 0;
- cs = (struct cardstate *) tty->driver_data;
- if (!cs) {
- pr_err("%s: no cardstate\n", __func__);
- return 0;
- }
-
gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
mutex_lock(&cs->mutex);
if (!cs->connected)
gig_dbg(DEBUG_IF, "not connected");
- else if (!cs->open_count)
- dev_warn(cs->dev, "%s: device not opened\n", __func__);
else if (cs->mstate != MS_LOCKED)
dev_warn(cs->dev, "can't write to unlocked device\n");
else
@@ -458,13 +399,7 @@ static int if_chars_in_buffer(struct tty_struct *tty)
static void if_throttle(struct tty_struct *tty)
{
- struct cardstate *cs;
-
- cs = (struct cardstate *) tty->driver_data;
- if (!cs) {
- pr_err("%s: no cardstate\n", __func__);
- return;
- }
+ struct cardstate *cs = tty->driver_data;
gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
@@ -472,8 +407,6 @@ static void if_throttle(struct tty_struct *tty)
if (!cs->connected)
gig_dbg(DEBUG_IF, "not connected"); /* nothing to do */
- else if (!cs->open_count)
- dev_warn(cs->dev, "%s: device not opened\n", __func__);
else
gig_dbg(DEBUG_IF, "%s: not implemented\n", __func__);
@@ -482,13 +415,7 @@ static void if_throttle(struct tty_struct *tty)
static void if_unthrottle(struct tty_struct *tty)
{
- struct cardstate *cs;
-
- cs = (struct cardstate *) tty->driver_data;
- if (!cs) {
- pr_err("%s: no cardstate\n", __func__);
- return;
- }
+ struct cardstate *cs = tty->driver_data;
gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
@@ -496,8 +423,6 @@ static void if_unthrottle(struct tty_struct *tty)
if (!cs->connected)
gig_dbg(DEBUG_IF, "not connected"); /* nothing to do */
- else if (!cs->open_count)
- dev_warn(cs->dev, "%s: device not opened\n", __func__);
else
gig_dbg(DEBUG_IF, "%s: not implemented\n", __func__);
@@ -506,18 +431,12 @@ static void if_unthrottle(struct tty_struct *tty)
static void if_set_termios(struct tty_struct *tty, struct ktermios *old)
{
- struct cardstate *cs;
+ struct cardstate *cs = tty->driver_data;
unsigned int iflag;
unsigned int cflag;
unsigned int old_cflag;
unsigned int control_state, new_state;
- cs = (struct cardstate *) tty->driver_data;
- if (!cs) {
- pr_err("%s: no cardstate\n", __func__);
- return;
- }
-
gig_dbg(DEBUG_IF, "%u: %s()", cs->minor_index, __func__);
mutex_lock(&cs->mutex);
@@ -527,11 +446,6 @@ static void if_set_termios(struct tty_struct *tty, struct ktermios *old)
goto out;
}
- if (!cs->open_count) {
- dev_warn(cs->dev, "%s: device not opened\n", __func__);
- goto out;
- }
-
iflag = tty->termios->c_iflag;
cflag = tty->termios->c_cflag;
old_cflag = old ? old->c_cflag : cflag;
@@ -588,10 +502,13 @@ out:
/* wakeup tasklet for the write operation */
static void if_wake(unsigned long data)
{
- struct cardstate *cs = (struct cardstate *) data;
+ struct cardstate *cs = (struct cardstate *)data;
+ struct tty_struct *tty = tty_port_tty_get(&cs->port);
- if (cs->tty)
- tty_wakeup(cs->tty);
+ if (tty) {
+ tty_wakeup(tty);
+ tty_kref_put(tty);
+ }
}
/*** interface to common ***/
@@ -644,18 +561,16 @@ void gigaset_if_free(struct cardstate *cs)
void gigaset_if_receive(struct cardstate *cs,
unsigned char *buffer, size_t len)
{
- unsigned long flags;
- struct tty_struct *tty;
+ struct tty_struct *tty = tty_port_tty_get(&cs->port);
- spin_lock_irqsave(&cs->lock, flags);
- tty = cs->tty;
- if (tty == NULL)
+ if (tty == NULL) {
gig_dbg(DEBUG_IF, "receive on closed device");
- else {
- tty_insert_flip_string(tty, buffer, len);
- tty_flip_buffer_push(tty);
+ return;
}
- spin_unlock_irqrestore(&cs->lock, flags);
+
+ tty_insert_flip_string(tty, buffer, len);
+ tty_flip_buffer_push(tty);
+ tty_kref_put(tty);
}
EXPORT_SYMBOL_GPL(gigaset_if_receive);
@@ -669,17 +584,15 @@ EXPORT_SYMBOL_GPL(gigaset_if_receive);
void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
const char *devname)
{
- unsigned minors = drv->minors;
int ret;
struct tty_driver *tty;
drv->have_tty = 0;
- drv->tty = tty = alloc_tty_driver(minors);
+ drv->tty = tty = alloc_tty_driver(drv->minors);
if (tty == NULL)
goto enomem;
- tty->magic = TTY_DRIVER_MAGIC,
tty->type = TTY_DRIVER_TYPE_SERIAL,
tty->subtype = SERIAL_TYPE_NORMAL,
tty->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
@@ -687,9 +600,6 @@ void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
tty->driver_name = procname;
tty->name = devname;
tty->minor_start = drv->minor;
- tty->num = drv->minors;
-
- tty->owner = THIS_MODULE;
tty->init_termios = tty_std_termios;
tty->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
index 2c26b64ebbea..ac4840124bc0 100644
--- a/drivers/isdn/i4l/isdn_tty.c
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -1590,12 +1590,9 @@ static int
isdn_tty_open(struct tty_struct *tty, struct file *filp)
{
modem_info *info;
- int retval, line;
+ int retval;
- line = tty->index;
- if (line < 0 || line >= ISDN_MAX_CHANNELS)
- return -ENODEV;
- info = &dev->mdm.info[line];
+ info = &dev->mdm.info[tty->index];
if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
return -ENODEV;
if (!try_module_get(info->owner)) {