From 1601033da2dd2052e0489137f7788a46a8fcd82f Mon Sep 17 00:00:00 2001
From: Mark Brown <broonie@kernel.org>
Date: Fri, 28 Jan 2022 19:24:43 +0000
Subject: [PATCH] ASoC: ops: Check for negative values before reading them
Git-commit: 1601033da2dd2052e0489137f7788a46a8fcd82f
Patch-mainline: v5.17-rc3
References: jsc#PED-850

The controls allow inputs to be specified as negative but our manipulating
them into register fields need to be done on unsigned variables so the
checks for negative numbers weren't taking effect properly. Do the checks
for negative values on the variable in the ABI struct rather than on our
local unsigned copy.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220128192443.3504823-1-broonie@kernel.org
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 sound/soc/soc-ops.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

--- a/sound/soc/soc-ops.c
+++ b/sound/soc/soc-ops.c
@@ -316,26 +316,26 @@ int snd_soc_put_volsw(struct snd_kcontro
 	if (sign_bit)
 		mask = BIT(sign_bit + 1) - 1;
 
+	if (ucontrol->value.integer.value[0] < 0)
+		return -EINVAL;
 	val = ucontrol->value.integer.value[0];
 	if (mc->platform_max && val > mc->platform_max)
 		return -EINVAL;
 	if (val > max - min)
 		return -EINVAL;
-	if (val < 0)
-		return -EINVAL;
 	val = (val + min) & mask;
 	if (invert)
 		val = max - val;
 	val_mask = mask << shift;
 	val = val << shift;
 	if (snd_soc_volsw_is_stereo(mc)) {
+		if (ucontrol->value.integer.value[1] < 0)
+			return -EINVAL;
 		val2 = ucontrol->value.integer.value[1];
 		if (mc->platform_max && val2 > mc->platform_max)
 			return -EINVAL;
 		if (val2 > max - min)
 			return -EINVAL;
-		if (val2 < 0)
-			return -EINVAL;
 		val2 = (val2 + min) & mask;
 		if (invert)
 			val2 = max - val2;
@@ -423,13 +423,13 @@ int snd_soc_put_volsw_sx(struct snd_kcon
 	int err = 0;
 	unsigned int val, val_mask;
 
+	if (ucontrol->value.integer.value[0] < 0)
+		return -EINVAL;
 	val = ucontrol->value.integer.value[0];
 	if (mc->platform_max && val > mc->platform_max)
 		return -EINVAL;
 	if (val > max - min)
 		return -EINVAL;
-	if (val < 0)
-		return -EINVAL;
 	val_mask = mask << shift;
 	val = (val + min) & mask;
 	val = val << shift;