[PATCH NEXT] rtlwifi: rtl8192c-common: Fix two typos

[PATCH NEXT] rtlwifi: rtl8192c-common: Fix two typos

[Larry Finger]

In this driver, two variables are masked by one quantity, and then tested
against a second number with more bits that the mask. Accordingly, the
test always fails. To minimize the possibility of such typos, a symbolic
definition of the mask is created and used.

The separate load and mask operations are also combined into a single
statement.

Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: David Binderman <dcb314@hotmail.com>
---
 drivers/net/wireless/rtlwifi/rtl8192c/dm_common.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/rtlwifi/rtl8192c/dm_common.c b/drivers/net/wireless/rtlwifi/rtl8192c/dm_common.c
index 0aca6f4..61c857b 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192c/dm_common.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192c/dm_common.c
@@ -39,6 +39,7 @@
 #define BT_RSSI_STATE_SPECIAL_LOW	BIT_OFFSET_LEN_MASK_32(2, 1)
 #define BT_RSSI_STATE_BG_EDCA_LOW	BIT_OFFSET_LEN_MASK_32(3, 1)
 #define BT_RSSI_STATE_TXPOWER_LOW	BIT_OFFSET_LEN_MASK_32(4, 1)
+#define BT_MASK				0x00ffffff
 
 #define RTLPRIV			(struct rtl_priv *)
 #define GET_UNDECORATED_AVERAGE_RSSI(_priv)	\
@@ -1536,13 +1537,11 @@ static bool rtl92c_bt_state_change(struct ieee80211_hw *hw)
 		return false;
 
 	bt_state = rtl_read_byte(rtlpriv, 0x4fd);
-	bt_tx = rtl_read_dword(rtlpriv, 0x488);
-	bt_tx = bt_tx & 0x00ffffff;
-	bt_pri = rtl_read_dword(rtlpriv, 0x48c);
-	bt_pri = bt_pri & 0x00ffffff;
+	bt_tx = rtl_read_dword(rtlpriv, 0x488) & BT_MASK;
+	bt_pri = rtl_read_dword(rtlpriv, 0x48c) & BT_MASK;
 	polling = rtl_read_dword(rtlpriv, 0x490);
 
-	if (bt_tx == 0xffffffff && bt_pri == 0xffffffff &&
+	if (bt_tx == BT_MASK && bt_pri == BT_MASK &&
 	    polling == 0xffffffff && bt_state == 0xff)
 		return false;
 
-- 
2.1.4

Re: [NEXT] rtlwifi: rtl8192c-common: Fix two typos

[Kalle Valo]

> In this driver, two variables are masked by one quantity, and then tested
> against a second number with more bits that the mask. Accordingly, the
> test always fails. To minimize the possibility of such typos, a symbolic
> definition of the mask is created and used.
> 
> The separate load and mask operations are also combined into a single
> statement.
> 
> Reported-by: David Binderman <dcb314@hotmail.com>
> Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
> Cc: David Binderman <dcb314@hotmail.com>

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

Kalle Valo