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authorGeliang Tang <geliangtang@163.com>2015-12-21 16:55:39 +0100
committerTakashi Iwai <tiwai@suse.de>2015-12-22 10:58:28 +0100
commitf67d71ae8bb18137eb1909a588879b33e06cc4c4 (patch)
tree592ec8f86af441c3153d263f96feb43494efe42a
parentALSA: fm801: restore TEA575x state on resume (diff)
downloadlinux-f67d71ae8bb18137eb1909a588879b33e06cc4c4.tar.xz
linux-f67d71ae8bb18137eb1909a588879b33e06cc4c4.zip
ALSA: usb-audio: use list_for_each_entry_continue_reverse
For better readability, use list_for_each_entry_continue_reverse() in have_dup_chmap(). Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
-rw-r--r--sound/usb/stream.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/sound/usb/stream.c b/sound/usb/stream.c
index 8ee14f2365e7..c4dc577ab1bd 100644
--- a/sound/usb/stream.c
+++ b/sound/usb/stream.c
@@ -125,11 +125,9 @@ static int usb_chmap_ctl_info(struct snd_kcontrol *kcontrol,
static bool have_dup_chmap(struct snd_usb_substream *subs,
struct audioformat *fp)
{
- struct list_head *p;
+ struct audioformat *prev = fp;
- for (p = fp->list.prev; p != &subs->fmt_list; p = p->prev) {
- struct audioformat *prev;
- prev = list_entry(p, struct audioformat, list);
+ list_for_each_entry_continue_reverse(prev, &subs->fmt_list, list) {
if (prev->chmap &&
!memcmp(prev->chmap, fp->chmap, sizeof(*fp->chmap)))
return true;