On Sat, 27 Feb 2021 09:59:51 +0100, Anton Yakovlev wrote: > +static int virtsnd_pcm_build_hw(struct virtio_pcm_substream *vss, > + struct virtio_snd_pcm_info *info) > +{ .... > + for (i = 0; i < ARRAY_SIZE(g_v2a_format_map); ++i) > + if (values & (1ULL << i)) { > + snd_pcm_format_t alsa_fmt = g_v2a_format_map[i]; > + int bytes = snd_pcm_format_physical_width(alsa_fmt) / 8; > + > + if (!sample_min || sample_min > bytes) > + sample_min = bytes; > + > + if (sample_max < bytes) > + sample_max = bytes; > + > + vss->hw.formats |= (1ULL << (__force int)alsa_fmt); Please use pcm_format_to_bits(). > + /* Align the buffer size to the page size */ > + vss->hw.buffer_bytes_max = > + (vss->hw.buffer_bytes_max + PAGE_SIZE - 1) & -PAGE_SIZE; You can use PAGE_ALIGN() macro. thanks, Takashi