linux-kernel - [PATCH] net: mvpp2: ptp: Fix unused variables

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Message-Id: <20200910134915.46660-1-alex.dewar90@gmail.com>
Date:   Thu, 10 Sep 2020 14:49:10 +0100
From:   Alex Dewar <alex.dewar90@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Alex Dewar <alex.dewar90@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Russell King <rmk+kernel@...linux.org.uk>,
        Matteo Croce <mcroce@...rosoft.com>,
        Sven Auhagen <sven.auhagen@...eatech.de>,
        Andrew Lunn <andrew@...n.ch>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] net: mvpp2: ptp: Fix unused variables

In the functions mvpp2_isr_handle_xlg() and
mvpp2_isr_handle_gmac_internal(), the bool variable link is assigned a
true value in the case that a given bit of val is set. However, if the
bit is unset, no value is assigned to link and it is then passed to
mvpp2_isr_handle_link() without being initialised. Fix by assigning to
link the value of the bit test.

Build-tested on x86.

Fixes: 36cfd3a6e52b ("net: mvpp2: restructure "link status" interrupt handling")
Signed-off-by: Alex Dewar <alex.dewar90@...il.com>
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 7d86940747d1..87b1c9cfdc77 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -3070,8 +3070,7 @@ static void mvpp2_isr_handle_xlg(struct mvpp2_port *port)
 	val = readl(port->base + MVPP22_XLG_INT_STAT);
 	if (val & MVPP22_XLG_INT_STAT_LINK) {
 		val = readl(port->base + MVPP22_XLG_STATUS);
-		if (val & MVPP22_XLG_STATUS_LINK_UP)
-			link = true;
+		link = (val & MVPP22_XLG_STATUS_LINK_UP);
 		mvpp2_isr_handle_link(port, link);
 	}
 }
@@ -3087,8 +3086,7 @@ static void mvpp2_isr_handle_gmac_internal(struct mvpp2_port *port)
 		val = readl(port->base + MVPP22_GMAC_INT_STAT);
 		if (val & MVPP22_GMAC_INT_STAT_LINK) {
 			val = readl(port->base + MVPP2_GMAC_STATUS0);
-			if (val & MVPP2_GMAC_STATUS0_LINK_UP)
-				link = true;
+			link = (val & MVPP2_GMAC_STATUS0_LINK_UP);
 			mvpp2_isr_handle_link(port, link);
 		}
 	}
-- 
2.28.0