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authorJiri Slaby <jslaby@suse.cz>2011-07-14 14:35:13 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2011-08-23 10:34:06 -0700
commiteff4b0b9fe37873d3dc7ade0e08e6f0f89279b8b (patch)
tree85b245dbe8b2dd6ae6eb79a883223bf5e34b0bb6 /drivers/tty/amiserial.c
parent6a3e492b6daaf7ec4dc41e51d87d2aae8ff886f2 (diff)
downloadop-kernel-dev-eff4b0b9fe37873d3dc7ade0e08e6f0f89279b8b.zip
op-kernel-dev-eff4b0b9fe37873d3dc7ade0e08e6f0f89279b8b.tar.gz
TTY: ami_serial, remove BTM from wait_until_sent
The same as in "TTY: serial, remove BTM from wait_until_sent" we don't need to take BTM in wait_until_sent of ami_serial. Exactly the same as serial, ami_serial accesses some "info" members (xmit_fifo_size, timeout), but their assignment on other places in the code is not protected by BTM anyway. So the BTM protects nothing here. This removal helps us to get rid of tty_locked() and __big_tty_mutex_owner in the following patch. This was suggested by Arnd. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@linux.intel.com> Cc: Andreas Bombe <aeb@debian.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/tty/amiserial.c')
-rw-r--r--drivers/tty/amiserial.c10
1 files changed, 1 insertions, 9 deletions
diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index 2205795..6d43f55 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -1529,7 +1529,6 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
{
struct async_struct * info = tty->driver_data;
unsigned long orig_jiffies, char_time;
- int tty_was_locked = tty_locked();
int lsr;
if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent"))
@@ -1541,12 +1540,6 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
orig_jiffies = jiffies;
/*
- * tty_wait_until_sent is called from lots of places,
- * with or without the BTM.
- */
- if (!tty_was_locked)
- tty_lock();
- /*
* Set the check interval to be 1/5 of the estimated time to
* send a single character, and make it at least 1. The check
* interval should also be less than the timeout.
@@ -1586,8 +1579,7 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
break;
}
__set_current_state(TASK_RUNNING);
- if (!tty_was_locked)
- tty_unlock();
+
#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
#endif
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