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path: root/drivers/isdn/gigaset/interface.c
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Diffstat (limited to 'drivers/isdn/gigaset/interface.c')
-rw-r--r--drivers/isdn/gigaset/interface.c105
1 files changed, 14 insertions, 91 deletions
diff --git a/drivers/isdn/gigaset/interface.c b/drivers/isdn/gigaset/interface.c
index 648260b07f1a..8ff50b056285 100644
--- a/drivers/isdn/gigaset/interface.c
+++ b/drivers/isdn/gigaset/interface.c
@@ -151,8 +151,6 @@ static int if_open(struct tty_struct *tty, struct file *filp)
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;
@@ -178,12 +176,11 @@ 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;
+ struct cardstate *cs = tty->driver_data;
unsigned long flags;
- 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;
}
@@ -211,18 +208,12 @@ 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 +222,7 @@ 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 +274,9 @@ 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 +292,10 @@ 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 +318,10 @@ 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 +332,6 @@ 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 +363,9 @@ 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 +374,7 @@ 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 +387,15 @@ 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 +408,7 @@ 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 +416,6 @@ 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 +424,7 @@ 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 +432,6 @@ 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 +440,12 @@ 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 +455,6 @@ 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;
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-15 05:04:56 +0300