linux-kernel - [PATCH] mmc: block: propagate correct returned value in mmc_rpmb

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Date:   Wed, 16 May 2018 21:20:20 +0200
From:   Mathieu Malaterre <malat@...ian.org>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Mathieu Malaterre <malat@...ian.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] mmc: block: propagate correct returned value in mmc_rpmb_ioctl

In commit 97548575bef3 ("mmc: block: Convert RPMB to a character device") a
new function `mmc_rpmb_ioctl` was added. The final return is simply
returning a value of `0` instead of propagating the correct return code.

Discovered during a compilation with W=1, silence the following gcc warning

  drivers/mmc/core/block.c:2470:6: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable]

Signed-off-by: Mathieu Malaterre <malat@...ian.org>
---
 drivers/mmc/core/block.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 9e923cd1d80e..38a7586b00cc 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -2485,7 +2485,7 @@ static long mmc_rpmb_ioctl(struct file *filp, unsigned int cmd,
 		break;
 	}
 
-	return 0;
+	return ret;
 }
 
 #ifdef CONFIG_COMPAT
-- 
2.11.0