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authorTakashi Iwai <tiwai@suse.de>2013-04-03 21:08:29 +0400
committerTakashi Iwai <tiwai@suse.de>2013-04-03 21:08:29 +0400
commit7c51746517e46806c59da6d780e7a14e8ae2bf78 (patch)
tree2bf23205e1d0557b623bff95e6a86ef80d443dc0 /sound/usb/clock.c
parentefc33ce197e4b6aaddf1eb2ba6293f51daf3c283 (diff)
downloadlinux-7c51746517e46806c59da6d780e7a14e8ae2bf78.tar.xz
ALSA: usb-audio: Clean up the code in set_sample_rate_v2()
Just for cleaning up, introduce a new function get_sample_rate_v2() for replacing two identical calls in set_sample_rate_v2(). No functional change. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/clock.c')
-rw-r--r--sound/usb/clock.c47
1 files changed, 23 insertions, 24 deletions
diff --git a/sound/usb/clock.c b/sound/usb/clock.c
index 9e2703a25156..e3ccf3d81075 100644
--- a/sound/usb/clock.c
+++ b/sound/usb/clock.c
@@ -247,6 +247,27 @@ static int set_sample_rate_v1(struct snd_usb_audio *chip, int iface,
return 0;
}
+static int get_sample_rate_v2(struct snd_usb_audio *chip, int iface,
+ int altsetting, int clock)
+{
+ struct usb_device *dev = chip->dev;
+ unsigned char data[4];
+ int err;
+
+ err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
+ USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
+ UAC2_CS_CONTROL_SAM_FREQ << 8,
+ snd_usb_ctrl_intf(chip) | (clock << 8),
+ data, sizeof(data));
+ if (err < 0) {
+ snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq (v2)\n",
+ dev->devnum, iface, altsetting);
+ return 0;
+ }
+
+ return data[0] | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);
+}
+
static int set_sample_rate_v2(struct snd_usb_audio *chip, int iface,
struct usb_host_interface *alts,
struct audioformat *fmt, int rate)
@@ -266,18 +287,7 @@ static int set_sample_rate_v2(struct snd_usb_audio *chip, int iface,
return -ENXIO;
}
- err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
- USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
- UAC2_CS_CONTROL_SAM_FREQ << 8,
- snd_usb_ctrl_intf(chip) | (clock << 8),
- data, sizeof(data));
- if (err < 0) {
- snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq (v2)\n",
- dev->devnum, iface, fmt->altsetting);
- prev_rate = 0;
- } else {
- prev_rate = data[0] | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);
- }
+ prev_rate = get_sample_rate_v2(chip, iface, fmt->altsetting, clock);
data[0] = rate;
data[1] = rate >> 8;
@@ -293,18 +303,7 @@ static int set_sample_rate_v2(struct snd_usb_audio *chip, int iface,
return err;
}
- err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_CUR,
- USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
- UAC2_CS_CONTROL_SAM_FREQ << 8,
- snd_usb_ctrl_intf(chip) | (clock << 8),
- data, sizeof(data));
- if (err < 0) {
- snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq (v2)\n",
- dev->devnum, iface, fmt->altsetting);
- cur_rate = 0;
- } else {
- cur_rate = data[0] | (data[1] << 8) | (data[2] << 16) | (data[3] << 24);
- }
+ cur_rate = get_sample_rate_v2(chip, iface, fmt->altsetting, clock);
if (cur_rate != rate) {
snd_printd(KERN_WARNING