Commit 0f519b62 authored by Clemens Ladisch's avatar Clemens Ladisch Committed by Takashi Iwai
Browse files

ALSA: pcm: snd_interval_step: drop the min parameter 



The min parameter was not used by any caller.  And if it were used,
underflows in the calculations could lead to incorrect results.

Signed-off-by: default avatarClemens Ladisch <clemens@ladisch.de>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent d89c6c0c

sound/core/pcm_lib.c

+4 −4
Original line number Diff line number Diff line
@@ -1113,16 +1113,16 @@ int snd_interval_list(struct snd_interval *i, unsigned int count, 


EXPORT_SYMBOL(snd_interval_list);



static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned int step)

static int snd_interval_step(struct snd_interval *i, unsigned int step)

{

	unsigned int n;

	int changed = 0;

	n = (i->min - min) % step;

	n = i->min % step;

	if (n != 0 || i->openmin) {

		i->min += step - n;

		changed = 1;

	}

	n = (i->max - min) % step;

	n = i->max % step;

	if (n != 0 || i->openmax) {

		i->max -= n;

		changed = 1;
@@ -1427,7 +1427,7 @@ static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params, 
				struct snd_pcm_hw_rule *rule)

{

	unsigned long step = (unsigned long) rule->private;

	return snd_interval_step(hw_param_interval(params, rule->var), 0, step);

	return snd_interval_step(hw_param_interval(params, rule->var), step);

}



/**