[PATCH] media: verisilicon: Fix kernel panic due to __initconst misuse

[ming.qian@oss.nxp.com]

From: Ming Qian <ming.qian@oss.nxp.com>

Fix a kernel panic when probing the driver as a module:

  Unable to handle kernel paging request at virtual address
  ffffd9c18eb05000
  of_find_matching_node_and_match+0x5c/0x1a0
  hantro_probe+0x2f4/0x7d0 [hantro_vpu]

The imx8mq_vpu_shared_resources array is referenced by variant
structures through their shared_devices field. When built as a
module, __initconst causes this data to be freed after module
init, but it's later accessed during probe, causing a page fault.

Use __initconst_or_module to keep the data available when built
as a module while still allowing it to be freed when built-in.

Fixes: e0203ddf9af7 ("media: verisilicon: Avoid G2 bus error while decoding H.264 and HEVC")
Signed-off-by: Ming Qian <ming.qian@oss.nxp.com>
---
 drivers/media/platform/verisilicon/imx8m_vpu_hw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/verisilicon/imx8m_vpu_hw.c b/drivers/media/platform/verisilicon/imx8m_vpu_hw.c
index 6f8e43b7f157..fa429e6e8281 100644
--- a/drivers/media/platform/verisilicon/imx8m_vpu_hw.c
+++ b/drivers/media/platform/verisilicon/imx8m_vpu_hw.c
@@ -343,7 +343,7 @@ const struct hantro_variant imx8mq_vpu_variant = {
 	.num_regs = ARRAY_SIZE(imx8mq_reg_names)
 };
 
-static const struct of_device_id imx8mq_vpu_shared_resources[] __initconst = {
+static const struct of_device_id imx8mq_vpu_shared_resources[] __initconst_or_module = {
 	{ .compatible = "nxp,imx8mq-vpu-g1", },
 	{ .compatible = "nxp,imx8mq-vpu-g2", },
 	{ /* sentinel */ }
-- 
2.52.0