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From: Ping-Ke Shih <pkshih@realtek.com>
To: <linux-wireless@vger.kernel.org>
CC: <kevin_yang@realtek.com>
Subject: [PATCH 2/8] wifi: rtw89: fw: scan offload prohibit all 6 GHz channel if no 6 GHz sband
Date: Fri, 12 Apr 2024 19:57:23 +0800
Message-ID: <20240412115729.8316-3-pkshih@realtek.com>
In-Reply-To: <20240412115729.8316-1-pkshih@realtek.com>
References: <20240412115729.8316-1-pkshih@realtek.com>
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From: Zong-Zhe Yang <kevin_yang@realtek.com>

We have some policy via BIOS to block uses of 6 GHz. In this case, 6 GHz
sband will be NULL even if it is WiFi 7 chip. So, add NULL handling here
to avoid crash.

Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/fw.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtw89/fw.c b/drivers/net/wireless/realtek/rtw89/fw.c
index 74d0d515ada0..d9ab781fa0e6 100644
--- a/drivers/net/wireless/realtek/rtw89/fw.c
+++ b/drivers/net/wireless/realtek/rtw89/fw.c
@@ -4689,6 +4689,10 @@ static void rtw89_scan_get_6g_disabled_chan(struct rtw89_dev *rtwdev,
 	u8 i, idx;
 
 	sband = rtwdev->hw->wiphy->bands[NL80211_BAND_6GHZ];
+	if (!sband) {
+		option->prohib_chan = U64_MAX;
+		return;
+	}
 
 	for (i = 0; i < sband->n_channels; i++) {
 		chan = &sband->channels[i];
-- 
2.25.1