linux-kernel - [PATCH 5.19 0470/1157] mt76: mt7915: fix endian bug in mt7915_rf_regval

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Date:   Mon, 15 Aug 2022 19:57:06 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Felix Fietkau <nbd@....name>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.19 0470/1157] mt76: mt7915: fix endian bug in mt7915_rf_regval_set()

From: Dan Carpenter <dan.carpenter@...cle.com>

[ Upstream commit f572dc969a59a80baa22bf2f7c9af0064402652f ]

This code is supposed to set a u32 value, but casting will not work on
big endian systems.

Fixes: 0a17329ae9c1 ("mt76: mt7915: add debugfs knob for RF registers read/write")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Felix Fietkau <nbd@....name>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
index d0c719ecacd0..fd76db8f5269 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
@@ -985,8 +985,9 @@ static int
 mt7915_rf_regval_set(void *data, u64 val)
 {
 	struct mt7915_dev *dev = data;
+	u32 val32 = val;
 
-	return mt7915_mcu_rf_regval(dev, dev->mt76.debugfs_reg, (u32 *)&val, true);
+	return mt7915_mcu_rf_regval(dev, dev->mt76.debugfs_reg, &val32, true);
 }
 
 DEFINE_DEBUGFS_ATTRIBUTE(fops_rf_regval, mt7915_rf_regval_get,
-- 
2.35.1