linux-kernel - [PATCH 5.15 089/171] mmc: renesas_sdhi: initialize variable properly when tuning

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Message-Id: <20211213092948.047760768@linuxfoundation.org>
Date:   Mon, 13 Dec 2021 10:30:04 +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>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
Subject: [PATCH 5.15 089/171] mmc: renesas_sdhi: initialize variable properly when tuning

From: Wolfram Sang <wsa+renesas@...g-engineering.com>

commit 7dba402807a85fa3723f4a27504813caf81cc9d7 upstream.

'cmd_error' is not necessarily initialized on some error paths in
mmc_send_tuning(). Initialize it.

Fixes: 2c9017d0b5d3 ("mmc: renesas_sdhi: abort tuning when timeout detected")
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc: stable@...r.kernel.org
Link: https://lore.kernel.org/r/20211130132309.18246-1-wsa+renesas@sang-engineering.com
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/mmc/host/renesas_sdhi_core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/mmc/host/renesas_sdhi_core.c
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -673,7 +673,7 @@ static int renesas_sdhi_execute_tuning(s
 
 	/* Issue CMD19 twice for each tap */
 	for (i = 0; i < 2 * priv->tap_num; i++) {
-		int cmd_error;
+		int cmd_error = 0;
 
 		/* Set sampling clock position */
 		sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, i % priv->tap_num);