[PATCH] ALSA: asihpi: Use flexible array for control cache

[Rosen Penev <rosenp@gmail.com>]

Store the ASIHPI control-cache lookup table in the control-cache
allocation instead of allocating it separately.

This keeps the lookup table tied to the cache object lifetime and
removes the extra allocation and free path.

Assisted-by: Codex:GPT-5.5
Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 sound/pci/asihpi/hpicmn.c | 16 ++++------------
 sound/pci/asihpi/hpicmn.h |  4 ++--
 2 files changed, 6 insertions(+), 14 deletions(-)

diff --git a/sound/pci/asihpi/hpicmn.c b/sound/pci/asihpi/hpicmn.c
index d846777e7462..0674fd854cc8 100644
--- a/sound/pci/asihpi/hpicmn.c
+++ b/sound/pci/asihpi/hpicmn.c
@@ -641,17 +641,12 @@ void hpi_cmn_control_cache_sync_to_msg(struct hpi_control_cache *p_cache,
 struct hpi_control_cache *hpi_alloc_control_cache(const u32 control_count,
 	const u32 size_in_bytes, u8 *p_dsp_control_buffer)
 {
-	struct hpi_control_cache *p_cache = kmalloc_obj(*p_cache);
+	struct hpi_control_cache *p_cache;
+
+	p_cache = kzalloc_flex(*p_cache, p_info, control_count);
 	if (!p_cache)
 		return NULL;
 
-	p_cache->p_info =
-		kzalloc_objs(*p_cache->p_info, control_count);
-	if (!p_cache->p_info) {
-		kfree(p_cache);
-		return NULL;
-	}
-
 	p_cache->cache_size_in_bytes = size_in_bytes;
 	p_cache->control_count = control_count;
 	p_cache->p_cache = p_dsp_control_buffer;
@@ -661,10 +656,7 @@ struct hpi_control_cache *hpi_alloc_control_cache(const u32 control_count,
 
 void hpi_free_control_cache(struct hpi_control_cache *p_cache)
 {
-	if (p_cache) {
-		kfree(p_cache->p_info);
-		kfree(p_cache);
-	}
+	kfree(p_cache);
 }
 
 static void subsys_message(struct hpi_message *phm, struct hpi_response *phr)
diff --git a/sound/pci/asihpi/hpicmn.h b/sound/pci/asihpi/hpicmn.h
index 8ec656cf8848..40af7329587a 100644
--- a/sound/pci/asihpi/hpicmn.h
+++ b/sound/pci/asihpi/hpicmn.h
@@ -37,10 +37,10 @@ struct hpi_control_cache {
 	u16 adap_idx;
 	u32 control_count;
 	u32 cache_size_in_bytes;
-	/** pointer to allocated memory of lookup pointers. */
-	struct hpi_control_cache_info **p_info;
 	/** pointer to DSP's control cache. */
 	u8 *p_cache;
+	/** pointer to allocated memory of lookup pointers. */
+	struct hpi_control_cache_info *p_info[] __counted_by(control_count);
 };
 
 struct hpi_adapter_obj *hpi_find_adapter(u16 adapter_index);
-- 
2.54.0