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media: nxp: imx8-isi: Add missing v4l2_subdev_cleanup() in crossbar and pipe

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Both mxc_isi_crossbar_init() and mxc_isi_pipe_init() call
v4l2_subdev_init_finalize() which allocates the subdev active state,
but neither mxc_isi_crossbar_cleanup() nor mxc_isi_pipe_cleanup()
calls v4l2_subdev_cleanup() to free it.

This causes a memory leak on every rmmod, reported by kmemleak:

  unreferenced object 0xffff0000d06fc800 (size 192):
    comm "(udev-worker)", pid 254, jiffies 4294913455
    backtrace (crc 36eeae58):
      kmemleak_alloc+0x34/0x40
      __kvmalloc_node_noprof+0x5f8/0x7d8
      __v4l2_subdev_state_alloc+0x1fc/0x30c
      __v4l2_subdev_init_finalize+0x178/0x368

Add the missing v4l2_subdev_cleanup() calls before media_entity_cleanup()
in both crossbar and pipe cleanup paths.

Fixes: cf21f328fc ("media: nxp: Add i.MX8 ISI driver")
Cc: stable@vger.kernel.org
Signed-off-by: Xiaolei Wang <xiaolei.wang@windriver.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patch.msgid.link/20260507041318.491594-3-xiaolei.wang@windriver.com
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
This commit is contained in:
Xiaolei Wang 2026-05-07 12:13:16 +08:00 committed by Hans Verkuil
parent b670bf8982
commit 567418eedd
2 changed files with 2 additions and 0 deletions
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1
drivers/media/platform/nxp/imx8-isi/imx8-isi-crossbar.c
View File

@ -491,6 +491,7 @@ int mxc_isi_crossbar_init(struct mxc_isi_dev *isi)
void mxc_isi_crossbar_cleanup(struct mxc_isi_crossbar *xbar)
{
v4l2_subdev_cleanup(&xbar->sd);
media_entity_cleanup(&xbar->sd.entity);
kfree(xbar->pads);
kfree(xbar->inputs);

1
drivers/media/platform/nxp/imx8-isi/imx8-isi-pipe.c
View File

@ -819,6 +819,7 @@ void mxc_isi_pipe_cleanup(struct mxc_isi_pipe *pipe)
{
struct v4l2_subdev *sd = &pipe->sd;
v4l2_subdev_cleanup(sd);
media_entity_cleanup(&sd->entity);
mutex_destroy(&pipe->lock);
}