memory: emif: fix device_node reference leak on np_ddr

of_get_memory_device_details() takes a reference on the DDR device
node via of_parse_phandle() and stores it in emif->np_ddr for later
use, but drops that reference without calling of_node_put() on two
error paths: the devm_kzalloc() allocation-failure check and the
is_dev_data_valid() check. Both return NULL immediately, leaking the
node reference each time either failure triggers.

The same reference is also never released on the success path: it is
kept for the life of the bound device (compared against a later
instance's np_ddr in the duplicate-DDR-geometry check) but
emif_remove() never calls of_node_put() on it, leaking it every time
an EMIF device unbinds. of_node_put() on a NULL pointer is a no-op, so
this is also safe for the non-DT get_device_details() path, where
np_ddr is left NULL by devm_kzalloc().

Fixes: e6b42eb6a66c ("memory: emif: add device tree support to emif driver")
Signed-off-by: Miles Krause <mileskrause5200@gmail.com>
Link: https://patch.msgid.link/20260909-master-v1-1-8800f5647ab2@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

0 files changed, 0 insertions, 0 deletions