drm/mediatek: Add missing IS_ERR check for ovl_adaptor platform devicegrafted

platform_device_register_data() can fail and return an ERR_PTR, but the
return value is used without checking, leading to an invalid pointer
being stored in ddp_comp[].dev and passed to component_match_add() and
mtk_ddp_comp_init(), which could result in a kernel crash.

Add an IS_ERR() check to jump to the error handling path on failure.

Fixes: 0d9eee9118b7 ("drm/mediatek: Add drm ovl_adaptor sub driver for MT8195")
Cc: stable@vger.kernel.org
Signed-off-by: Haojie Li <lihaojie@kylinos.cn>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20260825100845.438893-1-lihaojie@kylinos.cn/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

1 files changed, 109 insertions, 0 deletions

diff --git a/Documentation/driver-api/infiniband.rst b/Documentation/driver-api/infiniband.rst
new file mode 100644
index 000000000..d48f24677
--- /dev/null
+++ b/Documentation/driver-api/infiniband.rst
@@ -0,0 +1,109 @@
+===========================================
+InfiniBand and Remote DMA (RDMA) Interfaces
+===========================================
+
+Introduction and Overview
+=========================
+
+TBD
+
+InfiniBand core interfaces
+==========================
+
+.. kernel-doc:: drivers/infiniband/core/iwpm_util.h
+    :internal:
+
+.. kernel-doc:: drivers/infiniband/core/cq.c
+    :export:
+
+.. kernel-doc:: drivers/infiniband/core/cm.c
+    :export:
+
+.. kernel-doc:: drivers/infiniband/core/rw.c
+    :export:
+
+.. kernel-doc:: drivers/infiniband/core/device.c
+    :export:
+
+.. kernel-doc:: drivers/infiniband/core/verbs.c
+    :export:
+
+.. kernel-doc:: drivers/infiniband/core/packer.c
+    :export:
+
+.. kernel-doc:: drivers/infiniband/core/sa_query.c
+    :export:
+
+.. kernel-doc:: drivers/infiniband/core/ud_header.c
+    :export:
+
+.. kernel-doc:: drivers/infiniband/core/umem.c
+    :export:
+
+.. kernel-doc:: drivers/infiniband/core/umem_odp.c
+    :export:
+
+RDMA Verbs transport library
+============================
+
+.. kernel-doc:: drivers/infiniband/sw/rdmavt/mr.c
+    :export:
+
+.. kernel-doc:: drivers/infiniband/sw/rdmavt/rc.c
+    :export:
+
+.. kernel-doc:: drivers/infiniband/sw/rdmavt/ah.c
+    :export:
+
+.. kernel-doc:: drivers/infiniband/sw/rdmavt/vt.c
+    :export:
+
+.. kernel-doc:: drivers/infiniband/sw/rdmavt/cq.c
+    :export:
+
+.. kernel-doc:: drivers/infiniband/sw/rdmavt/qp.c
+    :export:
+
+.. kernel-doc:: drivers/infiniband/sw/rdmavt/mcast.c
+    :export:
+
+Upper Layer Protocols
+=====================
+
+iSCSI Extensions for RDMA (iSER)
+--------------------------------
+
+.. kernel-doc:: drivers/infiniband/ulp/iser/iscsi_iser.h
+   :internal:
+
+.. kernel-doc:: drivers/infiniband/ulp/iser/iscsi_iser.c
+   :functions: iscsi_iser_pdu_alloc iser_initialize_task_headers
+               iscsi_iser_task_init iscsi_iser_mtask_xmit iscsi_iser_task_xmit
+               iscsi_iser_cleanup_task iscsi_iser_check_protection
+               iscsi_iser_conn_create iscsi_iser_conn_bind
+               iscsi_iser_conn_start iscsi_iser_conn_stop
+               iscsi_iser_session_destroy iscsi_iser_session_create
+               iscsi_iser_set_param iscsi_iser_ep_connect iscsi_iser_ep_poll
+               iscsi_iser_ep_disconnect
+
+.. kernel-doc:: drivers/infiniband/ulp/iser/iser_initiator.c
+   :internal:
+
+.. kernel-doc:: drivers/infiniband/ulp/iser/iser_verbs.c
+   :internal:
+
+InfiniBand SCSI RDMA protocol target support
+--------------------------------------------
+
+.. kernel-doc:: drivers/infiniband/ulp/srpt/ib_srpt.h
+   :internal:
+
+.. kernel-doc:: drivers/infiniband/ulp/srpt/ib_srpt.c
+   :internal:
+
+iSCSI Extensions for RDMA (iSER) target support
+-----------------------------------------------
+
+.. kernel-doc:: drivers/infiniband/ulp/isert/ib_isert.c
+   :internal:
+