From 410235fd4d20b8feaf8930a0575d23acc088aa87 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 5 Mar 2012 14:52:01 +0100 Subject: TTY: remove unneeded tty->index checks Checking if tty->index is in bounds is not needed. The tty has the index set in the initial open. This is done in get_tty_driver. And it can be only in interval <0,driver->num). So remove the tests which check exactly this interval. Some are left untouched as they check against the current backing device count. (Leaving apart that the check is racy in most of the cases.) Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/hvc/hvcs.c | 24 ++++++++++-------------- drivers/tty/hvc/hvsi.c | 5 +---- 2 files changed, 11 insertions(+), 18 deletions(-) (limited to 'drivers/tty/hvc') diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c index da0aa476804..d23759183b4 100644 --- a/drivers/tty/hvc/hvcs.c +++ b/drivers/tty/hvc/hvcs.c @@ -1090,27 +1090,23 @@ static int hvcs_enable_device(struct hvcs_struct *hvcsd, uint32_t unit_address, */ static struct hvcs_struct *hvcs_get_by_index(int index) { - struct hvcs_struct *hvcsd = NULL; + struct hvcs_struct *hvcsd; unsigned long flags; spin_lock(&hvcs_structs_lock); - /* We can immediately discard OOB requests */ - if (index >= 0 && index < HVCS_MAX_SERVER_ADAPTERS) { - list_for_each_entry(hvcsd, &hvcs_structs, next) { - spin_lock_irqsave(&hvcsd->lock, flags); - if (hvcsd->index == index) { - kref_get(&hvcsd->kref); - spin_unlock_irqrestore(&hvcsd->lock, flags); - spin_unlock(&hvcs_structs_lock); - return hvcsd; - } + list_for_each_entry(hvcsd, &hvcs_structs, next) { + spin_lock_irqsave(&hvcsd->lock, flags); + if (hvcsd->index == index) { + kref_get(&hvcsd->kref); spin_unlock_irqrestore(&hvcsd->lock, flags); + spin_unlock(&hvcs_structs_lock); + return hvcsd; } - hvcsd = NULL; + spin_unlock_irqrestore(&hvcsd->lock, flags); } - spin_unlock(&hvcs_structs_lock); - return hvcsd; + + return NULL; } /* diff --git a/drivers/tty/hvc/hvsi.c b/drivers/tty/hvc/hvsi.c index 60bc4516418..a7488b74864 100644 --- a/drivers/tty/hvc/hvsi.c +++ b/drivers/tty/hvc/hvsi.c @@ -737,14 +737,11 @@ static int hvsi_open(struct tty_struct *tty, struct file *filp) { struct hvsi_struct *hp; unsigned long flags; - int line = tty->index; int ret; pr_debug("%s\n", __func__); - if (line < 0 || line >= hvsi_count) - return -ENODEV; - hp = &hvsi_ports[line]; + hp = &hvsi_ports[tty->index]; tty->driver_data = hp; -- cgit v1.2.3-70-g09d2