From: fenugrec <fenugrec@mail.com>
Date: Sun, 11 Jan 2026 21:36:40 +0000 (-0500)
Subject: ALSA: usb-audio: presonus s18xx uses little-endian
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3ce03297baff0ba116769044e4594fb324d4a551;p=thirdparty%2Fkernel%2Flinux.git

ALSA: usb-audio: presonus s18xx uses little-endian

Use __le32 types for USB control transfers

Signed-off-by: fenugrec <fenugrec@mail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20260111-preso_clean1-v2-1-44b4e5129a75@mail.com
---

diff --git a/sound/usb/mixer_s1810c.c b/sound/usb/mixer_s1810c.c
index 6e09e074c0e7..93510aa0dc5e 100644
--- a/sound/usb/mixer_s1810c.c
+++ b/sound/usb/mixer_s1810c.c
@@ -82,13 +82,13 @@
  * mixer and output but a different set for device.
  */
 struct s1810c_ctl_packet {
-	u32 a;
-	u32 b;
-	u32 fixed1;
-	u32 fixed2;
-	u32 c;
-	u32 d;
-	u32 e;
+	__le32 a;
+	__le32 b;
+	__le32 fixed1;
+	__le32 fixed2;
+	__le32 c;
+	__le32 d;
+	__le32 e;
 };
 
 #define SC1810C_CTL_LINE_SW	0
@@ -118,7 +118,7 @@ struct s1810c_ctl_packet {
  * being zero and different f1/f2.
  */
 struct s1810c_state_packet {
-	u32 fields[63];
+	__le32 fields[63];
 };
 
 #define SC1810C_STATE_48V_SW	58
@@ -140,14 +140,14 @@ snd_s1810c_send_ctl_packet(struct usb_device *dev, u32 a,
 	struct s1810c_ctl_packet pkt = { 0 };
 	int ret = 0;
 
-	pkt.fixed1 = SC1810C_CMD_F1;
-	pkt.fixed2 = SC1810C_CMD_F2;
+	pkt.fixed1 = __cpu_to_le32(SC1810C_CMD_F1);
+	pkt.fixed2 = __cpu_to_le32(SC1810C_CMD_F2);
 
-	pkt.a = a;
-	pkt.b = b;
-	pkt.c = c;
-	pkt.d = d;
-	pkt.e = e;
+	pkt.a = __cpu_to_le32(a);
+	pkt.b = __cpu_to_le32(b);
+	pkt.c = __cpu_to_le32(c);
+	pkt.d = __cpu_to_le32(d);
+	pkt.e = __cpu_to_le32(e);
 
 	ret = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
 			      SC1810C_CMD_REQ,
@@ -176,8 +176,8 @@ snd_sc1810c_get_status_field(struct usb_device *dev,
 	struct s1810c_state_packet pkt_in = { { 0 } };
 	int ret = 0;
 
-	pkt_out.fields[SC1810C_STATE_F1_IDX] = SC1810C_SET_STATE_F1;
-	pkt_out.fields[SC1810C_STATE_F2_IDX] = SC1810C_SET_STATE_F2;
+	pkt_out.fields[SC1810C_STATE_F1_IDX] = __cpu_to_le32(SC1810C_SET_STATE_F1);
+	pkt_out.fields[SC1810C_STATE_F2_IDX] = __cpu_to_le32(SC1810C_SET_STATE_F2);
 	ret = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
 			      SC1810C_SET_STATE_REQ,
 			      SC1810C_SET_STATE_REQTYPE,
@@ -197,7 +197,7 @@ snd_sc1810c_get_status_field(struct usb_device *dev,
 		return ret;
 	}
 
-	(*field) = pkt_in.fields[field_idx];
+	(*field) = __le32_to_cpu(pkt_in.fields[field_idx]);
 	(*seqnum)++;
 	return 0;
 }