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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Takashi Iwai <tiwai@suse.de>,
	"David S . Miller" <davem@davemloft.net>,
	Sasha Levin <sashal@kernel.org>,
	linux-usb@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 5.13 07/21] r8152: Fix potential PM refcount imbalance
Date: Tue, 27 Jul 2021 09:18:54 -0400	[thread overview]
Message-ID: <20210727131908.834086-7-sashal@kernel.org> (raw)
In-Reply-To: <20210727131908.834086-1-sashal@kernel.org>

From: Takashi Iwai <tiwai@suse.de>

[ Upstream commit 9c23aa51477a37f8b56c3c40192248db0663c196 ]

rtl8152_close() takes the refcount via usb_autopm_get_interface() but
it doesn't release when RTL8152_UNPLUG test hits.  This may lead to
the imbalance of PM refcount.  This patch addresses it.

Link: https://bugzilla.suse.com/show_bug.cgi?id=1186194
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/usb/r8152.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index e25bfb7021ed..8dcc55e4a5bc 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -6761,9 +6761,10 @@ static int rtl8152_close(struct net_device *netdev)
 		tp->rtl_ops.down(tp);
 
 		mutex_unlock(&tp->control);
+	}
 
+	if (!res)
 		usb_autopm_put_interface(tp->intf);
-	}
 
 	free_all_mem(tp);
 
-- 
2.30.2


       reply	other threads:[~2021-07-27 13:20 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20210727131908.834086-1-sashal@kernel.org>
2021-07-27 13:18 ` Sasha Levin [this message]
2021-07-27 13:18 ` [PATCH AUTOSEL 5.13 08/21] r8152: Fix a deadlock by doubly PM resume Sasha Levin
2021-07-27 13:18 ` [PATCH AUTOSEL 5.13 09/21] qed: fix possible unpaired spin_{un}lock_bh in _qed_mcp_cmd_and_union() Sasha Levin
2021-07-27 13:30   ` Justin He
2021-07-27 18:54     ` Sasha Levin
2021-07-27 13:18 ` [PATCH AUTOSEL 5.13 11/21] mt7530 fix mt7530_fdb_write vid missing ivl bit Sasha Levin
2021-07-27 13:18 ` [PATCH AUTOSEL 5.13 12/21] net: Fix zero-copy head len calculation Sasha Levin

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