ALSA: emu10k1: remove pointless locks from timer code
Contrary to its name, reg_lock locks the emu data structure, not the registers. As the functions access only data which is set once at card initialization, there is no point in locking it. Actually locking the registers would be pointless as well, as snd_emu10k1_intr_{en,dis}able() does its own locking, and TIMER is accessed only in this one place. Locking snd_emu10k1_timer_{start,stop}() against each other also wouldn't buy us anything; the functions interleaving their I/O accesses wouldn't introduce new problems. Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de> Link: https://lore.kernel.org/r/20230428095941.1706278-2-oswald.buddenhagen@gmx.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -18,29 +18,23 @@
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static int snd_emu10k1_timer_start(struct snd_timer *timer)
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{
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struct snd_emu10k1 *emu;
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unsigned long flags;
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unsigned int delay;
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emu = snd_timer_chip(timer);
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delay = timer->sticks - 1;
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if (delay < 5 ) /* minimum time is 5 ticks */
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delay = 5;
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spin_lock_irqsave(&emu->reg_lock, flags);
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snd_emu10k1_intr_enable(emu, INTE_INTERVALTIMERENB);
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outw(delay & TIMER_RATE_MASK, emu->port + TIMER);
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spin_unlock_irqrestore(&emu->reg_lock, flags);
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return 0;
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}
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static int snd_emu10k1_timer_stop(struct snd_timer *timer)
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{
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struct snd_emu10k1 *emu;
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unsigned long flags;
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emu = snd_timer_chip(timer);
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spin_lock_irqsave(&emu->reg_lock, flags);
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snd_emu10k1_intr_disable(emu, INTE_INTERVALTIMERENB);
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spin_unlock_irqrestore(&emu->reg_lock, flags);
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return 0;
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}
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