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From: Takashi Iwai <tiwai@suse.de>
To: alsa-devel@alsa-project.org
Cc: Takashi Iwai <tiwai@suse.de>
Subject: [PATCH v2 4/6] ALSA: control: Minor optimization for SNDRV_CTL_IOCTL_POWER_STATE
Date: Sun, 23 May 2021 11:09:18 +0200	[thread overview]
Message-ID: <20210523090920.15345-5-tiwai@suse.de> (raw)
In-Reply-To: <20210523090920.15345-1-tiwai@suse.de>

Long long time ago, before the proper PM framework was introduced, it
was still possible to reach SNDRV_CTL_IOCTL_POWER ioctl during the
power off state.  This ioctl existed as a main control for the suspend
resume state in the past, but the feature was already dropped along
with the standard PM framework.  Now the read part,
SNDRV_IOCTL_POWER_STATE ioctl, returns practically always D0, and we
can do some minor optimization there.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/core/control.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/sound/core/control.c b/sound/core/control.c
index 7fe901384c9c..a25c0d64d104 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -1817,11 +1817,7 @@ static long snd_ctl_ioctl(struct file *file, unsigned int cmd, unsigned long arg
 	case SNDRV_CTL_IOCTL_POWER:
 		return -ENOPROTOOPT;
 	case SNDRV_CTL_IOCTL_POWER_STATE:
-#ifdef CONFIG_PM
-		return put_user(card->power_state, ip) ? -EFAULT : 0;
-#else
 		return put_user(SNDRV_CTL_POWER_D0, ip) ? -EFAULT : 0;
-#endif
 	}
 	down_read(&snd_ioctl_rwsem);
 	list_for_each_entry(p, &snd_control_ioctls, list) {
-- 
2.26.2


  parent reply	other threads:[~2021-05-23  9:11 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-23  9:09 [PATCH v2 0/6] ALSA: Prep work for PCI rescan support Takashi Iwai
2021-05-23  9:09 ` [PATCH v2 1/6] ALSA: core: Use READ_ONCE() / WRITE_ONCE() for power state change Takashi Iwai
2021-05-23  9:09 ` [PATCH v2 2/6] ALSA: control: Track in-flight control read/write/tlv accesses Takashi Iwai
2021-05-23  9:09 ` [PATCH v2 3/6] ALSA: control: Drop superfluous snd_power_wait() calls Takashi Iwai
2021-05-23  9:09 ` Takashi Iwai [this message]
2021-05-23  9:09 ` [PATCH v2 5/6] ALSA: Drop superfluous argument from snd_power_wait() Takashi Iwai
2021-05-24  8:39   ` Mark Brown
2021-05-23  9:09 ` [PATCH v2 6/6] ALSA: pcm: Block the release until the system resume finishes Takashi Iwai
2021-05-24  9:32 ` [PATCH v2 0/6] ALSA: Prep work for PCI rescan support Jaroslav Kysela
2021-05-25  6:56 ` Takashi Iwai

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