linux-kernel - [PATCH 1/2] ALSA: hda: Use min() to simplify snd_hda_get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250813205507.215658-2-thorsten.blum@linux.dev>
Date: Wed, 13 Aug 2025 22:55:02 +0200
From: Thorsten Blum <thorsten.blum@...ux.dev>
To: Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Thorsten Blum <thorsten.blum@...ux.dev>,
	"Dr. David Alan Gilbert" <linux@...blig.org>,
	Julia Lawall <Julia.Lawall@...ia.fr>,
	Wentao Liang <vulab@...as.ac.cn>
Cc: Takashi Iwai <tiwai@...e.de>,
	linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] ALSA: hda: Use min() to simplify snd_hda_get_devices()

Use min() to simplify snd_hda_get_devices() and improve its readability.

Change the function parameter 'max_devices' from 'int' to 'unsigned int'
to avoid a min() signedness error. Update all related local variables
and the function's return type to 'unsigned int' accordingly.

No functional changes intended.

Signed-off-by: Thorsten Blum <thorsten.blum@...ux.dev>
---
 include/sound/hda_codec.h |  4 ++--
 sound/hda/common/codec.c  | 11 +++++------
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/include/sound/hda_codec.h b/include/sound/hda_codec.h
index ddc9c392f93f..006d4e4a8195 100644
--- a/include/sound/hda_codec.h
+++ b/include/sound/hda_codec.h
@@ -360,8 +360,8 @@ int snd_hda_override_conn_list(struct hda_codec *codec, hda_nid_t nid, int nums,
 int snd_hda_get_conn_index(struct hda_codec *codec, hda_nid_t mux,
 			   hda_nid_t nid, int recursive);
 unsigned int snd_hda_get_num_devices(struct hda_codec *codec, hda_nid_t nid);
-int snd_hda_get_devices(struct hda_codec *codec, hda_nid_t nid,
-			u8 *dev_list, int max_devices);
+unsigned int snd_hda_get_devices(struct hda_codec *codec, hda_nid_t nid,
+				u8 *dev_list, unsigned int max_devices);
 int snd_hda_get_dev_select(struct hda_codec *codec, hda_nid_t nid);
 int snd_hda_set_dev_select(struct hda_codec *codec, hda_nid_t nid, int dev_id);
 
diff --git a/sound/hda/common/codec.c b/sound/hda/common/codec.c
index eb268d442201..ce25608beff5 100644
--- a/sound/hda/common/codec.c
+++ b/sound/hda/common/codec.c
@@ -8,6 +8,7 @@
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/slab.h>
+#include <linux/minmax.h>
 #include <linux/mutex.h>
 #include <linux/module.h>
 #include <linux/pm.h>
@@ -323,18 +324,16 @@ EXPORT_SYMBOL_GPL(snd_hda_get_num_devices);
  * Copy the device list. This info is dynamic and so not cached.
  * Currently called only from hda_proc.c, so not exported.
  */
-int snd_hda_get_devices(struct hda_codec *codec, hda_nid_t nid,
-			u8 *dev_list, int max_devices)
+unsigned int snd_hda_get_devices(struct hda_codec *codec, hda_nid_t nid,
+				u8 *dev_list, unsigned int max_devices)
 {
-	unsigned int parm;
-	int i, dev_len, devices;
+	unsigned int parm, i, dev_len, devices;
 
 	parm = snd_hda_get_num_devices(codec, nid);
 	if (!parm)	/* not multi-stream capable */
 		return 0;
 
-	dev_len = parm + 1;
-	dev_len = dev_len < max_devices ? dev_len : max_devices;
+	dev_len = min(parm + 1, max_devices);
 
 	devices = 0;
 	while (devices < dev_len) {
-- 
2.50.1