linux-kernel - [PATCH v2 1/5] memory: renesas-rpc-if: Return correct value to the caller of rpcif_manual

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Message-Id: <20201126191146.8753-2-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date:   Thu, 26 Nov 2020 19:11:42 +0000
From:   Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
To:     Sergei Shtylyov <sergei.shtylyov@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Jiri Kosina <trivial@...nel.org>,
        Mark Brown <broonie@...nel.org>,
        linux-renesas-soc@...r.kernel.org, Pavel Machek <pavel@...x.de>,
        Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     linux-kernel@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        stable@...r.kernel.org
Subject: [PATCH v2 1/5] memory: renesas-rpc-if: Return correct value to the caller of rpcif_manual_xfer()

In the error path of rpcif_manual_xfer() the value of ret is overwritten
by value returned by reset_control_reset() function and thus returning
incorrect value to the caller.

This patch makes sure the correct value is returned to the caller of
rpcif_manual_xfer() by dropping the overwrite of ret in error path.
Also now we ignore the value returned by reset_control_reset() in the
error path and instead print a error message when it fails.

Fixes: ca7d8b980b67f ("memory: add Renesas RPC-IF driver")
Reported-by: Pavel Machek <pavel@...x.de>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc: stable@...r.kernel.org
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@...il.com>
---
 drivers/memory/renesas-rpc-if.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/memory/renesas-rpc-if.c b/drivers/memory/renesas-rpc-if.c
index f2a33a1af836..69f2e2b4cd50 100644
--- a/drivers/memory/renesas-rpc-if.c
+++ b/drivers/memory/renesas-rpc-if.c
@@ -508,7 +508,8 @@ int rpcif_manual_xfer(struct rpcif *rpc)
 	return ret;
 
 err_out:
-	ret = reset_control_reset(rpc->rstc);
+	if (reset_control_reset(rpc->rstc))
+		dev_err(rpc->dev, "Failed to reset HW\n");
 	rpcif_hw_init(rpc, rpc->bus_size == 2);
 	goto exit;
 }
-- 
2.25.1