linux-kernel - [PATCH net-next 3/8] net: phy: mscc: ptp: fix a smatch error

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Date:   Thu, 25 Jun 2020 17:42:06 +0200
From:   Antoine Tenart <antoine.tenart@...tlin.com>
To:     davem@...emloft.net, andrew@...n.ch, f.fainelli@...il.com,
        hkallweit1@...il.com
Cc:     Antoine Tenart <antoine.tenart@...tlin.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        thomas.petazzoni@...tlin.com, kernel test robot <lkp@...el.com>,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: [PATCH net-next 3/8] net: phy: mscc: ptp: fix a smatch error

The following error was reported by smatch:
vsc85xx_ts_read_csr() error: uninitialized symbol 'blk_hw'.

In practice this is very unlikely, as all the block identifiers given to
this functions are handled and described in an enum. The smatch error is
fixed by doing what is already done in vsc85xx_ts_write_csr: using the
"PROCESSOR" block by default.

Reported-by: kernel test robot <lkp@...el.com>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Antoine Tenart <antoine.tenart@...tlin.com>
---
 drivers/net/phy/mscc/mscc_ptp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/phy/mscc/mscc_ptp.c b/drivers/net/phy/mscc/mscc_ptp.c
index 17256d85cedf..030a56c9a06d 100644
--- a/drivers/net/phy/mscc/mscc_ptp.c
+++ b/drivers/net/phy/mscc/mscc_ptp.c
@@ -75,6 +75,7 @@ static u32 vsc85xx_ts_read_csr(struct phy_device *phydev, enum ts_blk blk,
 		blk_hw = base_port ? EGRESS_ENGINE_0 : EGRESS_ENGINE_1;
 		break;
 	case PROCESSOR:
+	default:
 		blk_hw = base_port ? PROCESSOR_0 : PROCESSOR_1;
 		break;
 	}
-- 
2.26.2