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 4.19 3/6] r8152: Fix potential PM refcount imbalance
Date: Tue, 27 Jul 2021 09:20:12 -0400 [thread overview]
Message-ID: <20210727132015.835651-3-sashal@kernel.org> (raw)
In-Reply-To: <20210727132015.835651-1-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 726fb5561a0f..4764e4f54cef 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -3960,9 +3960,10 @@ 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
parent reply other threads:[~2021-07-27 13:28 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20210727132015.835651-1-sashal@kernel.org>]
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