linux-kernel - [PATCH 5.15 238/262] MIPS: ralink: mt7621: use bitwise NOT instead of logical

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Date:   Mon,  7 Mar 2022 10:19:42 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Chuanhong Guo <gch981213@...il.com>,
        Ilya Lipnitskiy <ilya.lipnitskiy@...il.com>,
        Sergio Paracuellos <sergio.paracuellos@...il.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 238/262] MIPS: ralink: mt7621: use bitwise NOT instead of logical

From: Ilya Lipnitskiy <ilya.lipnitskiy@...il.com>

[ Upstream commit 5d8965704fe5662e2e4a7e4424a2cbe53e182670 ]

It was the intention to reverse the bits, not make them all zero by
using logical NOT operator.

Fixes: cc19db8b312a ("MIPS: ralink: mt7621: do memory detection on KSEG1")
Suggested-by: Chuanhong Guo <gch981213@...il.com>
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@...il.com>
Reviewed-by: Sergio Paracuellos <sergio.paracuellos@...il.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/mips/ralink/mt7621.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/ralink/mt7621.c b/arch/mips/ralink/mt7621.c
index fd9a872d5713..4c8378661219 100644
--- a/arch/mips/ralink/mt7621.c
+++ b/arch/mips/ralink/mt7621.c
@@ -38,7 +38,7 @@ static bool __init mt7621_addr_wraparound_test(phys_addr_t size)
 	__raw_writel(MT7621_MEM_TEST_PATTERN, dm);
 	if (__raw_readl(dm) != __raw_readl(dm + size))
 		return false;
-	__raw_writel(!MT7621_MEM_TEST_PATTERN, dm);
+	__raw_writel(~MT7621_MEM_TEST_PATTERN, dm);
 	return __raw_readl(dm) == __raw_readl(dm + size);
 }
 
-- 
2.34.1