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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Hanjun Guo <guohanjun@huawei.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Subject: [PATCH 5.9 203/391] ACPI: configfs: Add missing config_item_put() to fix refcount leak
Date:   Tue,  3 Nov 2020 21:34:14 +0100
Message-Id: <20201103203400.591849167@linuxfoundation.org>
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From: Hanjun Guo <guohanjun@huawei.com>

commit 9a2e849fb6de471b82d19989a7944d3b7671793c upstream.

config_item_put() should be called in the drop_item callback, to
decrement refcount for the config item.

Fixes: 772bf1e2878ec ("ACPI: configfs: Unload SSDT on configfs entry removal")
Signed-off-by: Hanjun Guo <guohanjun@huawei.com>
[ rjw: Subject edit ]
Cc: 4.13+ <stable@vger.kernel.org> # 4.13+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/acpi/acpi_configfs.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/acpi/acpi_configfs.c
+++ b/drivers/acpi/acpi_configfs.c
@@ -228,6 +228,7 @@ static void acpi_table_drop_item(struct
 
 	ACPI_INFO(("Host-directed Dynamic ACPI Table Unload"));
 	acpi_unload_table(table->index);
+	config_item_put(cfg);
 }
 
 static struct configfs_group_operations acpi_table_group_ops = {