From: Zong-Zhe Yang kevin_yang@realtek.com
[ Upstream commit c074da21dd346e0cfef5d08b0715078d7aea7f8d ]
Only 8852C chip has valid pages on RTW89_DBG_SEL_MAC_30. To other chips, this section is an address hole. It will lead to crash if trying to access this section on chips except for 8852C. So, we avoid that.
Signed-off-by: Zong-Zhe Yang kevin_yang@realtek.com Signed-off-by: Ping-Ke Shih pkshih@realtek.com Signed-off-by: Kalle Valo kvalo@kernel.org Link: https://lore.kernel.org/r/20230119063529.61563-2-pkshih@realtek.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/realtek/rtw89/debug.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/net/wireless/realtek/rtw89/debug.c b/drivers/net/wireless/realtek/rtw89/debug.c index 730e83d54257f..50701c55ed602 100644 --- a/drivers/net/wireless/realtek/rtw89/debug.c +++ b/drivers/net/wireless/realtek/rtw89/debug.c @@ -594,6 +594,7 @@ rtw89_debug_priv_mac_reg_dump_select(struct file *filp, struct seq_file *m = (struct seq_file *)filp->private_data; struct rtw89_debugfs_priv *debugfs_priv = m->private; struct rtw89_dev *rtwdev = debugfs_priv->rtwdev; + const struct rtw89_chip_info *chip = rtwdev->chip; char buf[32]; size_t buf_size; int sel; @@ -613,6 +614,12 @@ rtw89_debug_priv_mac_reg_dump_select(struct file *filp, return -EINVAL; }
+ if (sel == RTW89_DBG_SEL_MAC_30 && chip->chip_id != RTL8852C) { + rtw89_info(rtwdev, "sel %d is address hole on chip %d\n", sel, + chip->chip_id); + return -EINVAL; + } + debugfs_priv->cb_data = sel; rtw89_info(rtwdev, "select mac page dump %d\n", debugfs_priv->cb_data);