diff options
| author | Jia-Ju Bai <baijiaju1990@gmail.com> | 2018-07-27 16:55:28 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2018-07-27 11:48:07 +0200 |
| commit | df3f0347fd856272ca9fdbb6e691b7b512b7acb4 (patch) | |
| tree | 04c6ac57507626815273058742566eb07333f9c9 /sound/usb | |
| parent | 13e9a3edb4b702b701b5a9553b830aa3d2a3e3e9 (diff) | |
| download | linux-stable-df3f0347fd856272ca9fdbb6e691b7b512b7acb4.tar.gz linux-stable-df3f0347fd856272ca9fdbb6e691b7b512b7acb4.tar.bz2 linux-stable-df3f0347fd856272ca9fdbb6e691b7b512b7acb4.zip | |
ALSA: usb-audio: quirks: Replace mdelay() with msleep() and usleep_range()
snd_usb_select_mode_quirk(), snd_usb_set_interface_quirk() and
snd_usb_ctl_msg_quirk() are never called in atomic context.
They call mdelay() to busily wait, which is not necessary.
mdelay() can be replaced with msleep() and usleep_range().
This is found by a static analysis tool named DCNS written by myself.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb')
| -rw-r--r-- | sound/usb/quirks.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c index dde87d64bc32..8a945ece9869 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -1213,7 +1213,7 @@ int snd_usb_select_mode_quirk(struct snd_usb_substream *subs, if (err < 0) return err; - mdelay(20); /* Delay needed after setting the interface */ + msleep(20); /* Delay needed after setting the interface */ /* Vendor mode switch cmd is required. */ if (fmt->formats & SNDRV_PCM_FMTBIT_DSD_U32_BE) { @@ -1234,7 +1234,7 @@ int snd_usb_select_mode_quirk(struct snd_usb_substream *subs, return err; } - mdelay(20); + msleep(20); } return 0; } @@ -1281,7 +1281,7 @@ void snd_usb_set_interface_quirk(struct usb_device *dev) switch (USB_ID_VENDOR(chip->usb_id)) { case 0x23ba: /* Playback Design */ case 0x0644: /* TEAC Corp. */ - mdelay(50); + msleep(50); break; } } @@ -1301,7 +1301,7 @@ void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe, */ if (USB_ID_VENDOR(chip->usb_id) == 0x23ba && (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS) - mdelay(20); + msleep(20); /* * "TEAC Corp." products need a 20ms delay after each @@ -1309,14 +1309,14 @@ void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe, */ if (USB_ID_VENDOR(chip->usb_id) == 0x0644 && (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS) - mdelay(20); + msleep(20); /* ITF-USB DSD based DACs functionality need a delay * after each class compliant request */ if (is_itf_usb_dsd_dac(chip->usb_id) && (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS) - mdelay(20); + msleep(20); /* Zoom R16/24, Logitech H650e, Jabra 550a needs a tiny delay here, * otherwise requests like get/set frequency return as failed despite @@ -1326,7 +1326,7 @@ void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe, chip->usb_id == USB_ID(0x046d, 0x0a46) || chip->usb_id == USB_ID(0x0b0e, 0x0349)) && (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS) - mdelay(1); + usleep_range(1000, 2000); } /* |