[openwrt/openwrt] ath10k-ct: Fix spectral scan NULL pointer

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/040c02497c56c17d8cf04f9b8b535967d7c3b10e

commit 040c02497c56c17d8cf04f9b8b535967d7c3b10e
Author: Robert Marko <robimarko at gmail.com>
AuthorDate: Mon Nov 29 12:46:54 2021 +0100

    ath10k-ct: Fix spectral scan NULL pointer
    
    If spectral scan support is enabled then ath10k-ct will cause a NULL
    pointer due to relay_open() being called with a const callback struct
    which is only supported in kernel 5.11 and later.
    
    So, simply check the kernel version and if 5.11 and newer use the const
    callback struct, otherwise use the regular struct.
    
    Fixes: 553a3ac ("ath10k-ct: use 5.15 version")
    Signed-off-by: Robert Marko <robimarko at gmail.com>
---
 ...-ath10k-ct-Fix-spectral-scan-NULL-pointer.patch | 32 ++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/package/kernel/ath10k-ct/patches/300-ath10k-ct-Fix-spectral-scan-NULL-pointer.patch b/package/kernel/ath10k-ct/patches/300-ath10k-ct-Fix-spectral-scan-NULL-pointer.patch
new file mode 100644
index 0000000000..a3822a7e49
--- /dev/null
+++ b/package/kernel/ath10k-ct/patches/300-ath10k-ct-Fix-spectral-scan-NULL-pointer.patch
@@ -0,0 +1,32 @@
+From 0d2e335d780bda1432a9ba719c8200f796d27854 Mon Sep 17 00:00:00 2001
+From: Robert Marko <robimarko at gmail.com>
+Date: Mon, 29 Nov 2021 12:27:12 +0100
+Subject: [PATCH] ath10k-ct: Fix spectral scan NULL pointer
+
+If spectral scan support is enabled then ath10k-ct will cause a NULL
+pointer due to relay_open() being called with a const callback struct
+which is only supported in kernel 5.11 and later.
+
+So, simply check the kernel version and if 5.11 and newer use the const
+callback struct, otherwise use the regular struct.
+
+Fixes: 553a3ac ("ath10k-ct: use 5.15 version")
+Signed-off-by: Robert Marko <robimarko at gmail.com>
+---
+ ath10k-5.15/spectral.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+--- a/ath10k-5.15/spectral.c
++++ b/ath10k-5.15/spectral.c
+@@ -497,7 +497,11 @@ static int remove_buf_file_handler(struc
+ 	return 0;
+ }
+ 
++#if LINUX_VERSION_IS_GEQ(5,11,0)
+ static const struct rchan_callbacks rfs_spec_scan_cb = {
++#else
++static struct rchan_callbacks rfs_spec_scan_cb = {
++#endif
+ 	.create_buf_file = create_buf_file_handler,
+ 	.remove_buf_file = remove_buf_file_handler,
+ };