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rtlwifi: Fix programing CAM content sequence.

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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 <pkshih@realtek.com>
Signed-off-by: shaofu <shaofu@realtek.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Ping-Ke Shih 2017-02-06 21:29:58 -06:00 • committed by Kalle Valo
parent 36401cb7ff
commit 1e75622c63
1 changed files with 3 additions and 3 deletions
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6
drivers/net/wireless/realtek/rtlwifi/cam.c
View file

@ -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);