From 8a3ad1047593f1f6f431140f7dd9748423c51cd1 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:48:00 +0200 Subject: [PATCH] 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 Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/synclink.c | 44 +++++++++++++++++++++++++----------------- 1 file changed, 26 insertions(+), 18 deletions(-) diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c index 991bae821232..666aa1455fc7 100644 --- a/drivers/tty/synclink.c +++ b/drivers/tty/synclink.c @@ -3362,6 +3362,29 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, } /* 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 block_til_ready(struct tty_struct *tty, struct file * filp, */ 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 @@ static struct mgsl_struct* mgsl_allocate_device(void) } /* end of mgsl_allocate_device()*/ static const struct tty_operations mgsl_ops = { + .install = mgsl_install, .open = mgsl_open, .close = mgsl_close, .write = mgsl_write,