diff options
| author | Johan Hovold <johan@kernel.org> | 2018-08-27 10:21:52 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-11-13 11:08:48 -0800 |
| commit | d9e1cdc8b0ff6083103ef3c02e2b5163f52cc061 (patch) | |
| tree | eb33288d7f406bf3e26fa97d4403e9890089ef9c /drivers/nfc | |
| parent | c6d2e2023c2c0dd91cf8ba18fe2fa888aceb0f88 (diff) | |
NFC: nfcmrvl_uart: fix OF child-node lookup
commit 5bf59773aaf36dd62117dc83d50e1bbf9ef432da upstream.
Use the new of_get_compatible_child() helper to lookup the nfc 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 parent node).
Fixes: e097dc624f78 ("NFC: nfcmrvl: add UART driver")
Fixes: d8e018c0b321 ("NFC: nfcmrvl: update device tree bindings for Marvell NFC")
Cc: stable <stable@vger.kernel.org> # 4.2
Cc: Vincent Cuissard <cuissard@marvell.com>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nfc')
| -rw-r--r-- | drivers/nfc/nfcmrvl/uart.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/nfc/nfcmrvl/uart.c b/drivers/nfc/nfcmrvl/uart.c index 91162f8e0366..9a22056e8d9e 100644 --- a/drivers/nfc/nfcmrvl/uart.c +++ b/drivers/nfc/nfcmrvl/uart.c @@ -73,10 +73,9 @@ static int nfcmrvl_uart_parse_dt(struct device_node *node, struct device_node *matched_node; int ret; - matched_node = of_find_compatible_node(node, NULL, "marvell,nfc-uart"); + matched_node = of_get_compatible_child(node, "marvell,nfc-uart"); if (!matched_node) { - matched_node = of_find_compatible_node(node, NULL, - "mrvl,nfc-uart"); + matched_node = of_get_compatible_child(node, "mrvl,nfc-uart"); if (!matched_node) return -ENODEV; } |