For better readability, use list_for_each_entry_continue_reverse() in have_dup_chmap().
Signed-off-by: Geliang Tang geliangtang@163.com --- sound/usb/stream.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/sound/usb/stream.c b/sound/usb/stream.c index 8ee14f2..c4dc577 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;