2015-07-08 15:18:58

by Larry Finger

Subject: [PATCH] rtlwifi: rtl8821ae: Fix an expression that is always false

In routine _rtl8821ae_set_media_status(), an incorrect mask results in a test
for AP status to always be false. Similar bugs were fixed in rtl8192cu and
rtl8192de, but this instance was missed at that time.

Reported-by: David Binderman <[email protected]>
Signed-off-by: Larry Finger <[email protected]>
Cc: Stable <[email protected]> [3.18+]
Cc: David Binderman <[email protected]>
---
drivers/net/wireless/rtlwifi/rtl8821ae/hw.c | 2 +-
drivers/net/wireless/rtlwifi/rtl8821ae/reg.h | 1 +
2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/rtlwifi/rtl8821ae/hw.c b/drivers/net/wireless/rtlwifi/rtl8821ae/hw.c
index 3236d44..b7f18e21 100644
--- a/drivers/net/wireless/rtlwifi/rtl8821ae/hw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8821ae/hw.c
@@ -2180,7 +2180,7 @@ static int _rtl8821ae_set_media_status(struct ieee80211_hw *hw,

rtl_write_byte(rtlpriv, MSR, bt_msr);
rtlpriv->cfg->ops->led_control(hw, ledaction);
- if ((bt_msr & 0xfc) == MSR_AP)
+ if ((bt_msr & MSR_MASK) == MSR_AP)
rtl_write_byte(rtlpriv, REG_BCNTCFG + 1, 0x00);
else
rtl_write_byte(rtlpriv, REG_BCNTCFG + 1, 0x66);
diff --git a/drivers/net/wireless/rtlwifi/rtl8821ae/reg.h b/drivers/net/wireless/rtlwifi/rtl8821ae/reg.h
index 53668fc..1d6110f 100644
--- a/drivers/net/wireless/rtlwifi/rtl8821ae/reg.h
+++ b/drivers/net/wireless/rtlwifi/rtl8821ae/reg.h
@@ -429,6 +429,7 @@
#define MSR_ADHOC 0x01
#define MSR_INFRA 0x02
#define MSR_AP 0x03
+#define MSR_MASK 0x03

#define RRSR_RSC_OFFSET 21
#define RRSR_SHORT_OFFSET 23
--
2.1.4

2015-07-21 14:59:09

by Kalle Valo

Subject: Re: rtlwifi: rtl8821ae: Fix an expression that is always false

> In routine _rtl8821ae_set_media_status(), an incorrect mask results in a test
> for AP status to always be false. Similar bugs were fixed in rtl8192cu and
> rtl8192de, but this instance was missed at that time.
>
> Reported-by: David Binderman <[email protected]>
> Signed-off-by: Larry Finger <[email protected]>
> Cc: Stable <[email protected]> [3.18+]
> Cc: David Binderman <[email protected]>

Thanks, applied to wireless-drivers-next.git.

Kalle Valo