From 1ec7ed5163c70a0d040150d2279f932c7e7c143f Mon Sep 17 00:00:00 2001
From: Brian Norris <briannorris@chromium.org>
Date: Fri, 25 Feb 2022 11:44:32 +0200
Subject: [PATCH] Revert "ath: add support for special 0x0 regulatory domain"
Git-commit: 1ec7ed5163c70a0d040150d2279f932c7e7c143f
Patch-mainline: v5.18-rc1
References: git-fixes

This reverts commit 2dc016599cfa9672a147528ca26d70c3654a5423.

Users are reporting regressions in regulatory domain detection and
channel availability.

The problem this was trying to resolve was fixed in firmware anyway:

    QCA6174 hw3.0: sdio-4.4.1: add firmware.bin_WLAN.RMH.4.4.1-00042
    https://github.com/kvalo/ath10k-firmware/commit/4d382787f0efa77dba40394e0bc604f8eff82552

Link: https://bbs.archlinux.org/viewtopic.php?id=254535
Link: http://lists.infradead.org/pipermail/ath10k/2020-April/014871.html
Link: http://lists.infradead.org/pipermail/ath10k/2020-May/015152.html
Link: https://lore.kernel.org/all/1c160dfb-6ccc-b4d6-76f6-4364e0adb6dd@reox.at/
Fixes: 2dc016599cfa ("ath: add support for special 0x0 regulatory domain")
Cc: <stable@vger.kernel.org>
Cc: Wen Gong <wgong@codeaurora.org>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20200527165718.129307-1-briannorris@chromium.org
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/wireless/ath/regd.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/ath/regd.c b/drivers/net/wireless/ath/regd.c
index b2400e2417a5..f15e7bd690b5 100644
--- a/drivers/net/wireless/ath/regd.c
+++ b/drivers/net/wireless/ath/regd.c
@@ -667,14 +667,14 @@ ath_regd_init_wiphy(struct ath_regulatory *reg,
 
 /*
  * Some users have reported their EEPROM programmed with
- * 0x8000 or 0x0 set, this is not a supported regulatory
- * domain but since we have more than one user with it we
- * need a solution for them. We default to 0x64, which is
- * the default Atheros world regulatory domain.
+ * 0x8000 set, this is not a supported regulatory domain
+ * but since we have more than one user with it we need
+ * a solution for them. We default to 0x64, which is the
+ * default Atheros world regulatory domain.
  */
 static void ath_regd_sanitize(struct ath_regulatory *reg)
 {
-	if (reg->current_rd != COUNTRY_ERD_FLAG && reg->current_rd != 0)
+	if (reg->current_rd != COUNTRY_ERD_FLAG)
 		return;
 	printk(KERN_DEBUG "ath: EEPROM regdomain sanitized\n");
 	reg->current_rd = 0x64;
-- 
2.31.1