From 3c50211f2d534a5b766b1ff3c6cf6f7bd0bae753 Mon Sep 17 00:00:00 2001 From: Bard Liao Date: Tue, 7 Mar 2023 13:08:30 +0200 Subject: [PATCH] ASoC: SOF: ipc4-topology: don't allocate blob if it will not be used A copier blob will be only used when a copier is connected in the topology. An ALH copier in playback direction that doesn't have any source means the copier is not connected in the topology. Thus, we don't need to allocate the blob. The patch doesn't do the same test before freeing the blob because the blob is null and it is fine to free null. Signed-off-by: Bard Liao Reviewed-by: Pierre-Louis Bossart Reviewed-by: Ranjani Sridharan Signed-off-by: Peter Ujfalusi Link: https://lore.kernel.org/r/20230307110830.2178-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown --- sound/soc/sof/ipc4-topology.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/sound/soc/sof/ipc4-topology.c b/sound/soc/sof/ipc4-topology.c index 3e27c7a48ebd3..93b2855388d5a 100644 --- a/sound/soc/sof/ipc4-topology.c +++ b/sound/soc/sof/ipc4-topology.c @@ -517,7 +517,23 @@ static int sof_ipc4_widget_setup_comp_dai(struct snd_sof_widget *swidget) { struct snd_sof_dev *sdev = snd_soc_component_get_drvdata(scomp); struct sof_ipc4_alh_configuration_blob *blob; + struct snd_soc_dapm_path *p; struct snd_sof_widget *w; + int src_num = 0; + + snd_soc_dapm_widget_for_each_source_path(swidget->widget, p) + src_num++; + + if (swidget->id == snd_soc_dapm_dai_in && src_num == 0) { + /* + * The blob will not be used if the ALH copier is playback direction + * and doesn't connect to any source. + * It is fine to call kfree(ipc4_copier->copier_config) since + * ipc4_copier->copier_config is null. + */ + ret = 0; + break; + } blob = kzalloc(sizeof(*blob), GFP_KERNEL); if (!blob) { -- 2.30.2