linux-kernel - [PATCH 5.15 081/279] maple: fix wrong return value of maple_bus

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Message-Id: <20211124115721.518399441@linuxfoundation.org>
Date:   Wed, 24 Nov 2021 12:56:08 +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, Hulk Robot <hulkci@...wei.com>,
        Lu Wei <luwei32@...wei.com>,
        John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
        Rich Felker <dalias@...c.org>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 081/279] maple: fix wrong return value of maple_bus_init().

From: Lu Wei <luwei32@...wei.com>

[ Upstream commit bde82ee391fa6d3ad054313c4aa7b726d32515ce ]

If KMEM_CACHE or maple_alloc_dev failed, the maple_bus_init() will return 0
rather than error, because the retval is not changed after KMEM_CACHE or
maple_alloc_dev failed.

Fixes: 17be2d2b1c33 ("sh: Add maple bus support for the SEGA Dreamcast.")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Lu Wei <luwei32@...wei.com>
Acked-by: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
Signed-off-by: Rich Felker <dalias@...c.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/sh/maple/maple.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/sh/maple/maple.c b/drivers/sh/maple/maple.c
index bd0fbcdbdefe9..e24e220e56eea 100644
--- a/drivers/sh/maple/maple.c
+++ b/drivers/sh/maple/maple.c
@@ -834,8 +834,10 @@ static int __init maple_bus_init(void)
 
 	maple_queue_cache = KMEM_CACHE(maple_buffer, SLAB_HWCACHE_ALIGN);
 
-	if (!maple_queue_cache)
+	if (!maple_queue_cache) {
+		retval = -ENOMEM;
 		goto cleanup_bothirqs;
+	}
 
 	INIT_LIST_HEAD(&maple_waitq);
 	INIT_LIST_HEAD(&maple_sentq);
@@ -848,6 +850,7 @@ static int __init maple_bus_init(void)
 		if (!mdev[i]) {
 			while (i-- > 0)
 				maple_free_dev(mdev[i]);
+			retval = -ENOMEM;
 			goto cleanup_cache;
 		}
 		baseunits[i] = mdev[i];
-- 
2.33.0