linux-kernel - [PATCH 5.15 666/917] phy: ti: gmii-sel: check of_get

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Date:   Mon, 15 Nov 2021 18:02:41 +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, Dan Carpenter <dan.carpenter@...cle.com>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Vinod Koul <vkoul@...nel.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 666/917] phy: ti: gmii-sel: check of_get_address() for failure

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

[ Upstream commit 8d55027f4e2c04146a75fb63371ab96ccc887f2c ]

Smatch complains that if of_get_address() returns NULL, then "size"
isn't initialized.  Also it would lead to an Oops.

Fixes: 7f78322cdd67 ("phy: ti: gmii-sel: retrieve ports number and base offset from dt")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@...com>
Link: https://lore.kernel.org/r/20210914110038.GB11657@kili
Signed-off-by: Vinod Koul <vkoul@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/phy/ti/phy-gmii-sel.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/phy/ti/phy-gmii-sel.c b/drivers/phy/ti/phy-gmii-sel.c
index 5fd2e8a08bfcf..d0ab69750c6b4 100644
--- a/drivers/phy/ti/phy-gmii-sel.c
+++ b/drivers/phy/ti/phy-gmii-sel.c
@@ -320,6 +320,8 @@ static int phy_gmii_sel_init_ports(struct phy_gmii_sel_priv *priv)
 		u64 size;
 
 		offset = of_get_address(dev->of_node, 0, &size, NULL);
+		if (!offset)
+			return -EINVAL;
 		priv->num_ports = size / sizeof(u32);
 		if (!priv->num_ports)
 			return -EINVAL;
-- 
2.33.0