Re: [PATCH] rtlwifi: refactor code in halbtcoutsrc module

[Larry Finger]

On 08/30/2017 11:46 AM, Gustavo A. R. Silva wrote:

Function halbtc_get_wifi_rssi always returns rtlpriv->dm.undec_sm_pwdb.
So this function can be removed and the value of
rtlpriv->dm.undec_sm_pwdb assigned to *s32_tmp directly.

This issue was first reported by Coverity as "identical code for different
branches" in function halbtc_get_wifi_rssi.

Addresses-Coverity-ID: 1226793
Signed-off-by: Gustavo A. R. Silva 
---
This code was reported by Coverity and it was tested by compilation only.
Chances are this may be a copy/paste error in function
halbtc_get_wifi_rssi. Please, verify.
Also, notice this code has been there since 2014.


The value of *s32_tmp is not dependent on the link state, thus this patch is 
correct, but I request that it be changed. Future developments will modify 
halbtc_get_wifi_rssi() making it more complicated and not as easily inlined as 
this patch. In short, if you remove it here, we will have to add it later.


Thanks,

Larrt



  .../net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.c   | 13 +
  1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.c 
b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.c
index c1eacd8..2a47b97 100644
--- a/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.c
+++ b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.c
@@ -373,17 +373,6 @@ u32 halbtc_get_wifi_link_status(struct btc_coexist 
*btcoexist)
return ret_val;
  }
  
-static s32 halbtc_get_wifi_rssi(struct rtl_priv *rtlpriv)

-{
-   int undec_sm_pwdb = 0;
-
-   if (rtlpriv->mac80211.link_state >= MAC80211_LINKED)
-   undec_sm_pwdb = rtlpriv->dm.undec_sm_pwdb;
-   else /* associated entry pwdb */
-   undec_sm_pwdb = rtlpriv->dm.undec_sm_pwdb;
-   return undec_sm_pwdb;
-}
-
  static bool halbtc_get(void *void_btcoexist, u8 get_type, void *out_buf)
  {
struct btc_coexist *btcoexist = (struct btc_coexist *)void_btcoexist;
@@ -479,7 +468,7 @@ static bool halbtc_get(void *void_btcoexist, u8 get_type, 
void *out_buf)
*bool_tmp = false;
break;
case BTC_GET_S4_WIFI_RSSI:
-   *s32_tmp = halbtc_get_wifi_rssi(rtlpriv);
+   *s32_tmp = rtlpriv->dm.undec_sm_pwdb;
break;
case BTC_GET_S4_HS_RSSI:
*s32_tmp = 0;

[PATCH] rtlwifi: refactor code in halbtcoutsrc module

[Gustavo A. R. Silva]

Function halbtc_get_wifi_rssi always returns rtlpriv->dm.undec_sm_pwdb.
So this function can be removed and the value of
rtlpriv->dm.undec_sm_pwdb assigned to *s32_tmp directly.

This issue was first reported by Coverity as "identical code for different
branches" in function halbtc_get_wifi_rssi.

Addresses-Coverity-ID: 1226793
Signed-off-by: Gustavo A. R. Silva 
---
This code was reported by Coverity and it was tested by compilation only.
Chances are this may be a copy/paste error in function
halbtc_get_wifi_rssi. Please, verify.
Also, notice this code has been there since 2014.

 .../net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.c   | 13 +
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.c 
b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.c
index c1eacd8..2a47b97 100644
--- a/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.c
+++ b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.c
@@ -373,17 +373,6 @@ u32 halbtc_get_wifi_link_status(struct btc_coexist 
*btcoexist)
return ret_val;
 }
 
-static s32 halbtc_get_wifi_rssi(struct rtl_priv *rtlpriv)
-{
-   int undec_sm_pwdb = 0;
-
-   if (rtlpriv->mac80211.link_state >= MAC80211_LINKED)
-   undec_sm_pwdb = rtlpriv->dm.undec_sm_pwdb;
-   else /* associated entry pwdb */
-   undec_sm_pwdb = rtlpriv->dm.undec_sm_pwdb;
-   return undec_sm_pwdb;
-}
-
 static bool halbtc_get(void *void_btcoexist, u8 get_type, void *out_buf)
 {
struct btc_coexist *btcoexist = (struct btc_coexist *)void_btcoexist;
@@ -479,7 +468,7 @@ static bool halbtc_get(void *void_btcoexist, u8 get_type, 
void *out_buf)
*bool_tmp = false;
break;
case BTC_GET_S4_WIFI_RSSI:
-   *s32_tmp = halbtc_get_wifi_rssi(rtlpriv);
+   *s32_tmp = rtlpriv->dm.undec_sm_pwdb;
break;
case BTC_GET_S4_HS_RSSI:
*s32_tmp = 0;
-- 
2.5.0