From: Mathieu Malaterre <malat@debian.org>
Date: Wed, 16 May 2018 21:20:20 +0200
Subject: mmc: block: propagate correct returned value in mmc_rpmb_ioctl
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Git-commit: b25b750df99bcba29317d3f9d9f93c4ec58890e6
Patch-mainline: v4.17-rc7
References: fate#326572

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@debian.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Fixes: 97548575bef3 ("mmc: block: Convert RPMB to a character device")
Cc: stable@vger.kernel.org # v4.15+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
 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