+++ /dev/null
-From c483a5cc9d09f4ceaa9abb106f863cc89cb643d9 Mon Sep 17 00:00:00 2001
-From: Johan Hovold <johan@kernel.org>
-Date: Mon, 27 Aug 2018 10:21:48 +0200
-Subject: mmc: meson-mx-sdio: fix OF child-node lookup
-
-From: Johan Hovold <johan@kernel.org>
-
-commit c483a5cc9d09f4ceaa9abb106f863cc89cb643d9 upstream.
-
-Use the new of_get_compatible_child() helper to lookup the slot child
-node instead of using of_find_compatible_node(), which searches the
-entire tree from a given start node and thus can return an unrelated
-(i.e. non-child) node.
-
-This also addresses a potential use-after-free (e.g. after probe
-deferral) as the tree-wide helper drops a reference to its first
-argument (i.e. the node of the device being probed).
-
-While at it, also fix up the related slot-node reference leak.
-
-Fixes: ed80a13bb4c4 ("mmc: meson-mx-sdio: Add a driver for the Amlogic Meson8 and Meson8b SoCs")
-Cc: stable <stable@vger.kernel.org> # 4.15
-Cc: Carlo Caione <carlo@endlessm.com>
-Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
-Cc: Ulf Hansson <ulf.hansson@linaro.org>
-Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
-Signed-off-by: Johan Hovold <johan@kernel.org>
-Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-
----
- drivers/mmc/host/meson-mx-sdio.c | 8 ++++++--
- 1 file changed, 6 insertions(+), 2 deletions(-)
-
---- a/drivers/mmc/host/meson-mx-sdio.c
-+++ b/drivers/mmc/host/meson-mx-sdio.c
-@@ -517,19 +517,23 @@ static struct mmc_host_ops meson_mx_mmc_
- static struct platform_device *meson_mx_mmc_slot_pdev(struct device *parent)
- {
- struct device_node *slot_node;
-+ struct platform_device *pdev;
-
- /*
- * TODO: the MMC core framework currently does not support
- * controllers with multiple slots properly. So we only register
- * the first slot for now
- */
-- slot_node = of_find_compatible_node(parent->of_node, NULL, "mmc-slot");
-+ slot_node = of_get_compatible_child(parent->of_node, "mmc-slot");
- if (!slot_node) {
- dev_warn(parent, "no 'mmc-slot' sub-node found\n");
- return ERR_PTR(-ENOENT);
- }
-
-- return of_platform_device_create(slot_node, NULL, parent);
-+ pdev = of_platform_device_create(slot_node, NULL, parent);
-+ of_node_put(slot_node);
-+
-+ return pdev;
- }
-
- static int meson_mx_mmc_add_host(struct meson_mx_mmc_host *host)