The arch-linux-ath-user-regd from twisteroidambassador

ath10k can be patched, NO NEED to compile the entire kernel

I have found a site [1] which contains instructions on how to patch ath10k to ignore regulatory domain in EEPROM. Since I have a Qualcomm Atheros card which is affected by the problem, I tried the solution and it worked.

For me, I do the following steps in /tmp/ because it is faster, especially when extracting the kernel source code:
Step 1. Get the kernel source code, e.g. https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.14.14.tar.xz (Download the appropriate version according to the result of uname -r).
Step 2. Extract it, e.g. tar -xvJf linux-4.14.14.tar.xz
Step 3. Edit drivers/net/wireless/ath/regd.c in the extracted directory:
There are four parts to be patched in the aforementioned file:
Part 1:

static void  
ath_reg_apply_beaconing_flags(struct wiphy *wiphy,  
                              struct ath_regulatory *reg,
                              enum nl80211_reg_initiator initiator)
{

        enum nl80211_band band;
        struct ieee80211_supported_band *sband;
        struct ieee80211_channel *ch;
        unsigned int i;

       +#ifdef CONFIG_ATH_USER_REGD
       +    return;
       +#endif

        for (band = 0; band < NUM_NL80211_BANDS; band++) {
                if (!wiphy->bands[band])
                        continue;
                sband = wiphy->bands[band];
                for (i = 0; i < sband->n_channels; i++) {
                        ch = &sband->channels[i];
                        __ath_reg_apply_beaconing_flags(wiphy, reg,
                                                        initiator, ch);
                }
        }
}

Part 2:

static void  
ath_reg_apply_ir_flags(struct wiphy *wiphy,  
                       struct ath_regulatory *reg,
                       enum nl80211_reg_initiator initiator)
{
        struct ieee80211_supported_band *sband;

        +#ifdef CONFIG_ATH_USER_REGD
        +    return;
        +#endif

        sband = wiphy->bands[NL80211_BAND_2GHZ];
        if (!sband)
                return;

Part 3:

static void ath_reg_apply_radar_flags(struct wiphy *wiphy)  
{
        struct ieee80211_supported_band *sband;
        struct ieee80211_channel *ch;
        unsigned int i;

        +#ifdef CONFIG_ATH_USER_REGD
        +    return;
        +#endif

        if (!wiphy->bands[NL80211_BAND_5GHZ])
                return;

        sband = wiphy->bands[NL80211_BAND_5GHZ];

Part 4:

static int  
ath_regd_init_wiphy(struct ath_regulatory *reg,  
                    struct wiphy *wiphy,
                    void (*reg_notifier)(struct wiphy *wiphy,
                                         struct regulatory_request *request))
{
        const struct ieee80211_regdomain *regd;

        wiphy->reg_notifier = reg_notifier;

        +#ifdef CONFIG_ATH_USER_REGD
        +    return 0;
        +#endif

        wiphy->regulatory_flags |= REGULATORY_STRICT_REG |
                                   REGULATORY_CUSTOM_REG;

        if (ath_is_world_regd(reg)) {

Step 4. Edit drivers/net/wireless/ath/Kconfig in the extracted directory:

if WLAN_VENDOR_ATH

+config ATH_USER_REGD
+    bool "Do not enforce EEPROM regulatory restrictions"
+       default n

config ATH_DEBUG  
        bool "Atheros wireless debugging"
        ---help---
          Say Y, if you want to debug atheros wireless drivers.
          Right now only ath9k makes use of this.

Step 5. Run the following commands:

make clean && make mrproper  
cp /usr/lib/modules/$(uname -r)/build/Module.symvers ./  
# Copy current existing kernel configuration
zcat /proc/config.gz > .config  
make oldconfig && make prepare

If the following appears:

Wireless LAN (WLAN) [Y/n/?] y  
  ADMtek devices (WLAN_VENDOR_ADMTEK) [Y/n/?] y
    ADMtek ADM8211 support (ADM8211) [M/n/?] m
  Atheros/Qualcomm devices (WLAN_VENDOR_ATH) [Y/n/?] y
    Do not enforce EEPROM regulatory restrictions (ATH_USER_REGD) [N/y]

Enter y.
Then, start the compilation:

make scripts  
make M=drivers/net/wireless/ath

Step 6. Replace the kernel module by entering the following commands:

# Use xz. Although the website says to use gzip, which will not work. From the file list on https://www.archlinux.org/packages/core/x86_64/linux/ , one can see that xz is used.
xz drivers/net/wireless/ath/ath.ko 
sudo cp -f drivers/net/wireless/ath/ath.ko.xz /lib/modules/$(uname -r)/kernel/drivers/net/wireless/ath/ath.ko.xz
sudo depmod -a

Step 7. Reboot.

The above method does not require the compilation of the entire kernel, which takes many hours.

[1] https://www.kdaye.com/ap-5ghz-ath10k/

There is new update for 402-ath_regd_optional.patch for power limit issue

Hi,
I found that there is a power limit related update for 402-ath_regd_optional.patch.
79a768a90fa94c0a38c9def1992cc974c091e286
That patch maybe helpful as I was suffering week signal strength issue after applying your patch.

Thanks.

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ath10k can be patched, NO NEED to compile the entire kernel

There is new update for 402-ath_regd_optional.patch for power limit issue

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