wifi: rtw89: fw: scan offload prohibit all 6 GHz channel if no 6 GHz sband

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>
Link: https://msgid.link/20240412115729.8316-3-pkshih@realtek.com

diff --git a/drivers/net/wireless/realtek/rtw89/fw.c b/drivers/net/wireless/realtek/rtw89/fw.c
index 74d0d515ada0e5decfb44825d648478aa59aabc9..d9ab781fa0e64d9b90ccde46ba3aeeb3c6e77e03 100644 (file)
--- 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];