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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        Biju Das <biju.das.jz@bp.renesas.com>,
        Wolfram Sang <wsa+renesas@sang-engineering.com>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.16 0118/1039] mtd: hyperbus: rpc-if: Check return value of rpcif_sw_init()
Date:   Mon, 24 Jan 2022 19:31:47 +0100
Message-Id: <20220124184129.107940134@linuxfoundation.org>
In-Reply-To: <20220124184125.121143506@linuxfoundation.org>
References: <20220124184125.121143506@linuxfoundation.org>
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From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

[ Upstream commit 981387ed06b96908223a607f5fba6efa42728fc2 ]

rpcif_sw_init() can fail so make sure we check the return value
of it and on error exit rpcif_hb_probe() callback with error code.

Fixes: 5de15b610f78 ("mtd: hyperbus: add Renesas RPC-IF driver")
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20211025205631.21151-5-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/mtd/hyperbus/rpc-if.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/hyperbus/rpc-if.c b/drivers/mtd/hyperbus/rpc-if.c
index ecb050ba95cdf..367b0d72bf622 100644
--- a/drivers/mtd/hyperbus/rpc-if.c
+++ b/drivers/mtd/hyperbus/rpc-if.c
@@ -124,7 +124,9 @@ static int rpcif_hb_probe(struct platform_device *pdev)
 	if (!hyperbus)
 		return -ENOMEM;
 
-	rpcif_sw_init(&hyperbus->rpc, pdev->dev.parent);
+	error = rpcif_sw_init(&hyperbus->rpc, pdev->dev.parent);
+	if (error)
+		return error;
 
 	platform_set_drvdata(pdev, hyperbus);
 
-- 
2.34.1