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r8152: Fix potential PM refcount imbalance

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[ 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>
This commit is contained in:
Takashi Iwai 2021-07-14 19:00:21 +02:00 • committed by Greg Kroah-Hartman
commit 6bc48348ec
1 changed files with 2 additions and 1 deletions
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5
drivers/net/usb/r8152.c
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@ -4317,10 +4317,11 @@ static int rtl8152_close(struct net_device *netdev)
tp->rtl_ops.down(tp);
mutex_unlock(&tp->control);
usb_autopm_put_interface(tp->intf);
}
if (!res)
usb_autopm_put_interface(tp->intf);
free_all_mem(tp);
return res;