From 1e75622c630b8701f11ea6af568e0006885c9b46 Mon Sep 17 00:00:00 2001 From: Ping-Ke Shih Date: Mon, 6 Feb 2017 21:29:58 -0600 Subject: [PATCH] rtlwifi: Fix programing CAM content sequence. There is a potential race condition when the control byte of a CAM entry is written first. Write in reverse order to correct the condition. Signed-off-by: Ping-Ke Shih Signed-off-by: shaofu Signed-off-by: Larry Finger Signed-off-by: Kalle Valo --- drivers/net/wireless/realtek/rtlwifi/cam.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/realtek/rtlwifi/cam.c b/drivers/net/wireless/realtek/rtlwifi/cam.c index a0605d8e9970..f7a7dcbf945e 100644 --- a/drivers/net/wireless/realtek/rtlwifi/cam.c +++ b/drivers/net/wireless/realtek/rtlwifi/cam.c @@ -45,12 +45,13 @@ static void rtl_cam_program_entry(struct ieee80211_hw *hw, u32 entry_no, u32 target_command; u32 target_content = 0; - u8 entry_i; + int entry_i; RT_PRINT_DATA(rtlpriv, COMP_SEC, DBG_DMESG, "Key content :", key_cont_128, 16); - for (entry_i = 0; entry_i < CAM_CONTENT_COUNT; entry_i++) { + /* 0-1 config + mac, 2-5 fill 128key,6-7 are reserved */ + for (entry_i = CAM_CONTENT_COUNT - 1; entry_i >= 0; entry_i--) { target_command = entry_i + CAM_CONTENT_COUNT * entry_no; target_command = target_command | BIT(31) | BIT(16); @@ -102,7 +103,6 @@ static void rtl_cam_program_entry(struct ieee80211_hw *hw, u32 entry_no, target_content); rtl_write_dword(rtlpriv, rtlpriv->cfg->maps[RWCAM], target_command); - udelay(100); RT_TRACE(rtlpriv, COMP_SEC, DBG_LOUD, "WRITE A4: %x\n", target_content); -- 2.39.5