diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2023-12-04 08:30:13 +0100 |
|---|---|---|
| committer | Kalle Valo <kvalo@kernel.org> | 2023-12-12 17:10:41 +0200 |
| commit | 595b1280e2c95ea53fbb228bb90d834caa0f86f1 (patch) | |
| tree | 89e4c52b2880dd89e530cbe4f284ba43dab61882 /drivers/net/wireless/realtek | |
| parent | 379872288fd353119d15c65f11d20a219e09d6b2 (diff) | |
wifi: rtw89: avoid stringop-overflow warning
After -Wstringop-overflow got enabled, the rtw89 driver produced
two odd warnings with gcc-13:
drivers/net/wireless/realtek/rtw89/coex.c: In function 'rtw89_btc_ntfy_scan_start':
drivers/net/wireless/realtek/rtw89/coex.c:5362:50: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
5362 | wl->dbcc_info.scan_band[phy_idx] = band;
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
In file included from drivers/net/wireless/realtek/rtw89/coex.h:8,
from drivers/net/wireless/realtek/rtw89/coex.c:5:
drivers/net/wireless/realtek/rtw89/core.h:1441:12: note: at offset [64, 255] into destination object 'scan_band' of size 2
1441 | u8 scan_band[RTW89_PHY_MAX]; /* scan band in each phy */
| ^~~~~~~~~
drivers/net/wireless/realtek/rtw89/coex.c: In function 'rtw89_btc_ntfy_switch_band':
drivers/net/wireless/realtek/rtw89/coex.c:5406:50: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
5406 | wl->dbcc_info.scan_band[phy_idx] = band;
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
drivers/net/wireless/realtek/rtw89/core.h:1441:12: note: at offset [64, 255] into destination object 'scan_band' of size 2
1441 | u8 scan_band[RTW89_PHY_MAX]; /* scan band in each phy */
| ^~~~~~~~~
I don't know what happened here, but adding an explicit range check
shuts up the output.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20231204073020.1105416-1-arnd@kernel.org
Diffstat (limited to 'drivers/net/wireless/realtek')
| -rw-r--r-- | drivers/net/wireless/realtek/rtw89/coex.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtw89/coex.c b/drivers/net/wireless/realtek/rtw89/coex.c index b842cd9a86f8..9c0db35d3e13 100644 --- a/drivers/net/wireless/realtek/rtw89/coex.c +++ b/drivers/net/wireless/realtek/rtw89/coex.c @@ -5352,6 +5352,10 @@ void rtw89_btc_ntfy_scan_start(struct rtw89_dev *rtwdev, u8 phy_idx, u8 band) rtw89_debug(rtwdev, RTW89_DBG_BTC, "[BTC], %s(): phy_idx=%d, band=%d\n", __func__, phy_idx, band); + + if (phy_idx >= RTW89_PHY_MAX) + return; + btc->dm.cnt_notify[BTC_NCNT_SCAN_START]++; wl->status.map.scan = true; wl->scan_info.band[phy_idx] = band; @@ -5396,6 +5400,10 @@ void rtw89_btc_ntfy_switch_band(struct rtw89_dev *rtwdev, u8 phy_idx, u8 band) rtw89_debug(rtwdev, RTW89_DBG_BTC, "[BTC], %s(): phy_idx=%d, band=%d\n", __func__, phy_idx, band); + + if (phy_idx >= RTW89_PHY_MAX) + return; + btc->dm.cnt_notify[BTC_NCNT_SWITCH_BAND]++; wl->scan_info.band[phy_idx] = band; |