TTY: synclink, add tty install
This has two outcomes:
* we give the TTY layer a tty_port
* we do not find the info structure every time open is called on that
tty
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c
index 991bae8..666aa14 100644
--- a/drivers/tty/synclink.c
+++ b/drivers/tty/synclink.c
@@ -3362,6 +3362,29 @@
} /* end of block_til_ready() */
+static int mgsl_install(struct tty_driver *driver, struct tty_struct *tty)
+{
+ struct mgsl_struct *info;
+ int line = tty->index;
+
+ /* verify range of specified line number */
+ if (line >= mgsl_device_count) {
+ printk("%s(%d):mgsl_open with invalid line #%d.\n",
+ __FILE__, __LINE__, line);
+ return -ENODEV;
+ }
+
+ /* find the info structure for the specified line */
+ info = mgsl_device_list;
+ while (info && info->line != line)
+ info = info->next_device;
+ if (mgsl_paranoia_check(info, tty->name, "mgsl_open"))
+ return -ENODEV;
+ tty->driver_data = info;
+
+ return tty_port_install(&info->port, driver, tty);
+}
+
/* mgsl_open()
*
* Called when a port is opened. Init and enable port.
@@ -3374,26 +3397,10 @@
*/
static int mgsl_open(struct tty_struct *tty, struct file * filp)
{
- struct mgsl_struct *info;
- int retval, line;
+ struct mgsl_struct *info = tty->driver_data;
unsigned long flags;
+ int retval;
- /* verify range of specified line number */
- line = tty->index;
- if (line >= mgsl_device_count) {
- printk("%s(%d):mgsl_open with invalid line #%d.\n",
- __FILE__,__LINE__,line);
- return -ENODEV;
- }
-
- /* find the info structure for the specified line */
- info = mgsl_device_list;
- while(info && info->line != line)
- info = info->next_device;
- if (mgsl_paranoia_check(info, tty->name, "mgsl_open"))
- return -ENODEV;
-
- tty->driver_data = info;
info->port.tty = tty;
if (debug_level >= DEBUG_LEVEL_INFO)
@@ -4297,6 +4304,7 @@
} /* end of mgsl_allocate_device()*/
static const struct tty_operations mgsl_ops = {
+ .install = mgsl_install,
.open = mgsl_open,
.close = mgsl_close,
.write = mgsl_write,