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Char: moxa, fix and optimise empty timer

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moxa, fix and optimise empty timer

don't wait and delete empty timer in empty timer function. Also fire next
empty timer at rounded jiffies to save power.

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jiri Slaby 2007-10-18 03:06:19 -07:00 committed by Linus Torvalds
parent fc37449f79
commit c43422053b
1 changed files with 2 additions and 2 deletions
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4
drivers/char/moxa.c
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@ -1040,14 +1040,14 @@ static void check_xmit_empty(unsigned long data)
struct moxa_port *ch;
ch = (struct moxa_port *) data;
del_timer_sync(&moxa_ports[ch->port].emptyTimer);
if (ch->tty && (ch->statusflags & EMPTYWAIT)) {
if (MoxaPortTxQueue(ch->port) == 0) {
ch->statusflags &= ~EMPTYWAIT;
tty_wakeup(ch->tty);
return;
}
mod_timer(&moxa_ports[ch->port].emptyTimer, jiffies + HZ);
mod_timer(&moxa_ports[ch->port].emptyTimer,
round_jiffies(jiffies + HZ));
} else
ch->statusflags &= ~EMPTYWAIT;
}