[openwrt/openwrt] kernel: ltq-vdsl-vr9-mei: fix warning about field-spanning write

[LEDE Commits]

nick pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/7bc487c12eefc53a4f7b67cba6f590ce9807a968

commit 7bc487c12eefc53a4f7b67cba6f590ce9807a968
Author: Martin Schiller <ms at dev.tdt.de>
AuthorDate: Thu Apr 11 20:31:01 2024 +0200

    kernel: ltq-vdsl-vr9-mei: fix warning about field-spanning write
    
    We need to use unsafe_memcpy() here, because the code do the field-
    spanning write intentionally.
    
    Signed-off-by: Martin Schiller <ms at dev.tdt.de>
---
 ...safe_memcpy-for-intentional-field-spanning-write.patch | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/package/kernel/lantiq/ltq-vdsl-vr9-mei/patches/401-use-unsafe_memcpy-for-intentional-field-spanning-write.patch b/package/kernel/lantiq/ltq-vdsl-vr9-mei/patches/401-use-unsafe_memcpy-for-intentional-field-spanning-write.patch
new file mode 100644
index 0000000000..1542ace44f
--- /dev/null
+++ b/package/kernel/lantiq/ltq-vdsl-vr9-mei/patches/401-use-unsafe_memcpy-for-intentional-field-spanning-write.patch
@@ -0,0 +1,15 @@
+--- a/src/drv_mei_cpe_msg_process.c
++++ b/src/drv_mei_cpe_msg_process.c
+@@ -3524,7 +3524,12 @@ IFX_int32_t MEI_IoctlCmdMsgWrite(
+    {
+       if (bInternCall)
+       {
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(5,19,0))
+          memcpy(pDestPtr, pUserMsg->pPayload, pUserMsg->paylSize_byte);
++#else
++         unsafe_memcpy(pDestPtr, pUserMsg->pPayload, pUserMsg->paylSize_byte,
++                       /* field-spanning writing is used here intentionally */);
++#endif
+       }
+       else
+       {