[PATCH 0/3] staging: rtlwifi: Remove unnecessary functions

[PATCH 0/3] staging: rtlwifi: Remove unnecessary functions

[Maya Nakamura]

This patchset removes functions that only return zero or the second
argument. It also removes the functions that are not used at all.

Maya Nakamura (3):
  staging: rtlwifi: Remove function that only returns the second
    argument
  staging: rtlwifi: Remove function that only returns zero
  staging: rtlwifi: Remove unused functions

 .../staging/rtlwifi/phydm/phydm_hwconfig.c    | 73 ++-----------------
 .../staging/rtlwifi/phydm/phydm_hwconfig.h    | 12 ---
 2 files changed, 6 insertions(+), 79 deletions(-)

-- 
2.17.1

[PATCH 1/3] staging: rtlwifi: Remove function that only returns the second argument

[Maya Nakamura]

Because the odm_signal_scale_mapping function is only called to return the
second argument, remove the unnecessary function and change five
statements that call it.

Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
---
 .../staging/rtlwifi/phydm/phydm_hwconfig.c    | 27 ++++---------------
 .../staging/rtlwifi/phydm/phydm_hwconfig.h    |  2 --
 2 files changed, 5 insertions(+), 24 deletions(-)

diff --git a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
index 4bf86e5a451f..fd208581d857 100644
--- a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
+++ b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
@@ -477,18 +477,6 @@ static u8 odm_query_rx_pwr_percentage(s8 ant_power)
 		return 100 + ant_power;
 }
 
-/*
- * 2012/01/12 MH MOve some signal strength smooth method to MP HAL layer.
- * IF other SW team do not support the feature, remove this section.??
- */
-
-s32 odm_signal_scale_mapping(struct phy_dm_struct *dm, s32 curr_sig)
-{
-	{
-		return curr_sig;
-	}
-}
-
 static u8 odm_sq_process_patch_rt_cid_819x_lenovo(struct phy_dm_struct *dm,
 						  u8 is_cck_rate, u8 pwdb_all,
 						  u8 path, u8 RSSI)
@@ -749,13 +737,11 @@ static void odm_rx_phy_status92c_series_parsing(
 	 */
 	/* It is assigned to the BSS List in GetValueFromBeaconOrProbeRsp(). */
 	if (is_cck_rate) {
-		phy_info->signal_strength = (u8)(
-			odm_signal_scale_mapping(dm, pwdb_all)); /*pwdb_all;*/
+		phy_info->signal_strength = (u8)pwdb_all;
 	} else {
 		if (rf_rx_num != 0) {
 			phy_info->signal_strength =
-				(u8)(odm_signal_scale_mapping(dm, total_rssi /=
-								  rf_rx_num));
+				(u8)(total_rssi /= rf_rx_num);
 		}
 	}
 
@@ -1051,8 +1037,7 @@ static void odm_rx_phy_status_jaguar_series_parsing(
 	 */
 	/*It is assigned to the BSS List in GetValueFromBeaconOrProbeRsp().*/
 	if (is_cck_rate) {
-		phy_info->signal_strength = (u8)(
-			odm_signal_scale_mapping(dm, pwdb_all)); /*pwdb_all;*/
+		phy_info->signal_strength = (u8)pwdb_all;
 	} else {
 		if (rf_rx_num != 0) {
 			/* 2015/01 Sean, use the best two RSSI only,
@@ -1062,8 +1047,7 @@ static void odm_rx_phy_status_jaguar_series_parsing(
 				avg_rssi = best_rssi;
 			else
 				avg_rssi = (best_rssi + second_rssi) / 2;
-			phy_info->signal_strength =
-				(u8)(odm_signal_scale_mapping(dm, avg_rssi));
+			phy_info->signal_strength = (u8)avg_rssi;
 		}
 	}
 	dm->rx_pwdb_ave = dm->rx_pwdb_ave + phy_info->rx_pwdb_all;
@@ -1874,8 +1858,7 @@ void phydm_rx_phy_status_new_type(struct phy_dm_struct *phydm, u8 *phy_status,
 	/* Update signal strength to UI, and phy_info->rx_pwdb_all is the
 	 * maximum RSSI of all path
 	 */
-	phy_info->signal_strength =
-		(u8)(odm_signal_scale_mapping(phydm, phy_info->rx_pwdb_all));
+	phy_info->signal_strength = (u8)phy_info->rx_pwdb_all;
 
 	/* Calculate average RSSI and smoothed RSSI */
 	phydm_process_rssi_for_dm_new_type(phydm, phy_info, pktinfo);
diff --git a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.h b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.h
index 6ad5e0292a97..c9833889688c 100644
--- a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.h
+++ b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.h
@@ -216,8 +216,6 @@ odm_config_fw_with_header_file(struct phy_dm_struct *dm,
 
 u32 odm_get_hw_img_version(struct phy_dm_struct *dm);
 
-s32 odm_signal_scale_mapping(struct phy_dm_struct *dm, s32 curr_sig);
-
 /*For 8822B only!! need to move to FW finally */
 /*==============================================*/
 void phydm_rx_phy_status_new_type(struct phy_dm_struct *phydm, u8 *phy_status,
-- 
2.17.1

[PATCH 2/3] staging: rtlwifi: Remove function that only returns zero

[Maya Nakamura]

Because the odm_sq_process_patch_rt_cid_819x_lenovo function is only
called to return zero, remove the unnecessary function and change one
statement that calls it. Issue found by Coccinelle's semantic patch
results for returnvar.cocci.

Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
---
 drivers/staging/rtlwifi/phydm/phydm_hwconfig.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
index fd208581d857..335a435caa2c 100644
--- a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
+++ b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
@@ -477,14 +477,6 @@ static u8 odm_query_rx_pwr_percentage(s8 ant_power)
 		return 100 + ant_power;
 }
 
-static u8 odm_sq_process_patch_rt_cid_819x_lenovo(struct phy_dm_struct *dm,
-						  u8 is_cck_rate, u8 pwdb_all,
-						  u8 path, u8 RSSI)
-{
-	u8 sq = 0;
-	return sq;
-}
-
 static u8 odm_evm_db_to_percentage(s8 value)
 {
 	/* -33dB~0dB to 0%~99% */
@@ -891,8 +883,7 @@ static void odm_rx_phy_status_jaguar_series_parsing(
 
 			if ((dm->support_platform == ODM_WIN) &&
 			    (dm->patch_id == RT_CID_819X_LENOVO))
-				sq = odm_sq_process_patch_rt_cid_819x_lenovo(
-					dm, is_cck_rate, pwdb_all, 0, 0);
+				sq = 0;
 			else
 				sq = phydm_get_signal_quality_8812(phy_info, dm,
 								   phy_sta_rpt);
-- 
2.17.1

[PATCH 3/3] staging: rtlwifi: Remove unused functions

[Maya Nakamura]

Remove the five functions that are not used from the source and header
files. Issue found by Coccinelle's semantic patch results for
returnvar.cocci.

Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
---
 .../staging/rtlwifi/phydm/phydm_hwconfig.c    | 35 -------------------
 .../staging/rtlwifi/phydm/phydm_hwconfig.h    | 10 ------
 2 files changed, 45 deletions(-)

diff --git a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
index 335a435caa2c..397352de46bc 100644
--- a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
+++ b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
@@ -1854,38 +1854,3 @@ void phydm_rx_phy_status_new_type(struct phy_dm_struct *phydm, u8 *phy_status,
 	/* Calculate average RSSI and smoothed RSSI */
 	phydm_process_rssi_for_dm_new_type(phydm, phy_info, pktinfo);
 }
-
-u32 query_phydm_trx_capability(struct phy_dm_struct *dm)
-{
-	u32 value32 = 0xFFFFFFFF;
-
-	return value32;
-}
-
-u32 query_phydm_stbc_capability(struct phy_dm_struct *dm)
-{
-	u32 value32 = 0xFFFFFFFF;
-
-	return value32;
-}
-
-u32 query_phydm_ldpc_capability(struct phy_dm_struct *dm)
-{
-	u32 value32 = 0xFFFFFFFF;
-
-	return value32;
-}
-
-u32 query_phydm_txbf_parameters(struct phy_dm_struct *dm)
-{
-	u32 value32 = 0xFFFFFFFF;
-
-	return value32;
-}
-
-u32 query_phydm_txbf_capability(struct phy_dm_struct *dm)
-{
-	u32 value32 = 0xFFFFFFFF;
-
-	return value32;
-}
diff --git a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.h b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.h
index c9833889688c..ee4b9f0af2a1 100644
--- a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.h
+++ b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.h
@@ -484,14 +484,4 @@ struct phy_status_rpt_jaguar2_type2 {
 #endif
 };
 
-u32 query_phydm_trx_capability(struct phy_dm_struct *dm);
-
-u32 query_phydm_stbc_capability(struct phy_dm_struct *dm);
-
-u32 query_phydm_ldpc_capability(struct phy_dm_struct *dm);
-
-u32 query_phydm_txbf_parameters(struct phy_dm_struct *dm);
-
-u32 query_phydm_txbf_capability(struct phy_dm_struct *dm);
-
 #endif /*#ifndef	__HALHWOUTSRC_H__*/
-- 
2.17.1

Re: [Outreachy kernel] [PATCH 2/3] staging: rtlwifi: Remove function that only returns zero

[Julia Lawall]

On Wed, 24 Oct 2018, Maya Nakamura wrote:

> Because the odm_sq_process_patch_rt_cid_819x_lenovo function is only
> called to return zero, remove the unnecessary function and change one
> statement that calls it. Issue found by Coccinelle's semantic patch
> results for returnvar.cocci.
>
> Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
> ---
>  drivers/staging/rtlwifi/phydm/phydm_hwconfig.c | 11 +----------
>  1 file changed, 1 insertion(+), 10 deletions(-)
>
> diff --git a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
> index fd208581d857..335a435caa2c 100644
> --- a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
> +++ b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
> @@ -477,14 +477,6 @@ static u8 odm_query_rx_pwr_percentage(s8 ant_power)
>  		return 100 + ant_power;
>  }
>
> -static u8 odm_sq_process_patch_rt_cid_819x_lenovo(struct phy_dm_struct *dm,
> -						  u8 is_cck_rate, u8 pwdb_all,
> -						  u8 path, u8 RSSI)
> -{
> -	u8 sq = 0;
> -	return sq;
> -}
> -
>  static u8 odm_evm_db_to_percentage(s8 value)
>  {
>  	/* -33dB~0dB to 0%~99% */
> @@ -891,8 +883,7 @@ static void odm_rx_phy_status_jaguar_series_parsing(
>
>  			if ((dm->support_platform == ODM_WIN) &&
>  			    (dm->patch_id == RT_CID_819X_LENOVO))
> -				sq = odm_sq_process_patch_rt_cid_819x_lenovo(
> -					dm, is_cck_rate, pwdb_all, 0, 0);
> +				sq = 0;
>  			else
>  				sq = phydm_get_signal_quality_8812(phy_info, dm,
>  								   phy_sta_rpt);

Would it be better to just put u8 sq = 0; ?  Then you could negate the
condition and drop one of the branches.

julia

Re: [Outreachy kernel] [PATCH 1/3] staging: rtlwifi: Remove function that only returns the second argument

[Julia Lawall]

On Wed, 24 Oct 2018, Maya Nakamura wrote:

> Because the odm_signal_scale_mapping function is only called to return the
> second argument, remove the unnecessary function and change five
> statements that call it.
>
> Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
> ---
>  .../staging/rtlwifi/phydm/phydm_hwconfig.c    | 27 ++++---------------
>  .../staging/rtlwifi/phydm/phydm_hwconfig.h    |  2 --
>  2 files changed, 5 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
> index 4bf86e5a451f..fd208581d857 100644
> --- a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
> +++ b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
> @@ -477,18 +477,6 @@ static u8 odm_query_rx_pwr_percentage(s8 ant_power)
>  		return 100 + ant_power;
>  }
>
> -/*
> - * 2012/01/12 MH MOve some signal strength smooth method to MP HAL layer.
> - * IF other SW team do not support the feature, remove this section.??
> - */
> -
> -s32 odm_signal_scale_mapping(struct phy_dm_struct *dm, s32 curr_sig)
> -{
> -	{
> -		return curr_sig;
> -	}
> -}
> -
>  static u8 odm_sq_process_patch_rt_cid_819x_lenovo(struct phy_dm_struct *dm,
>  						  u8 is_cck_rate, u8 pwdb_all,
>  						  u8 path, u8 RSSI)
> @@ -749,13 +737,11 @@ static void odm_rx_phy_status92c_series_parsing(
>  	 */
>  	/* It is assigned to the BSS List in GetValueFromBeaconOrProbeRsp(). */
>  	if (is_cck_rate) {
> -		phy_info->signal_strength = (u8)(
> -			odm_signal_scale_mapping(dm, pwdb_all)); /*pwdb_all;*/
> +		phy_info->signal_strength = (u8)pwdb_all;

pwdb_all was already a u8 value.  The original code was taking a u8 value,
casting it to s32 and then casting it back to u8.  It would be good to
explain whether this can have an impact.  The comment on the
signal_strength structure field says that the value should be between 0
and 100.

julia

>  	} else {
>  		if (rf_rx_num != 0) {
>  			phy_info->signal_strength =
> -				(u8)(odm_signal_scale_mapping(dm, total_rssi /=
> -								  rf_rx_num));
> +				(u8)(total_rssi /= rf_rx_num);
>  		}
>  	}
>
> @@ -1051,8 +1037,7 @@ static void odm_rx_phy_status_jaguar_series_parsing(
>  	 */
>  	/*It is assigned to the BSS List in GetValueFromBeaconOrProbeRsp().*/
>  	if (is_cck_rate) {
> -		phy_info->signal_strength = (u8)(
> -			odm_signal_scale_mapping(dm, pwdb_all)); /*pwdb_all;*/
> +		phy_info->signal_strength = (u8)pwdb_all;
>  	} else {
>  		if (rf_rx_num != 0) {
>  			/* 2015/01 Sean, use the best two RSSI only,
> @@ -1062,8 +1047,7 @@ static void odm_rx_phy_status_jaguar_series_parsing(
>  				avg_rssi = best_rssi;
>  			else
>  				avg_rssi = (best_rssi + second_rssi) / 2;
> -			phy_info->signal_strength =
> -				(u8)(odm_signal_scale_mapping(dm, avg_rssi));
> +			phy_info->signal_strength = (u8)avg_rssi;
>  		}
>  	}
>  	dm->rx_pwdb_ave = dm->rx_pwdb_ave + phy_info->rx_pwdb_all;
> @@ -1874,8 +1858,7 @@ void phydm_rx_phy_status_new_type(struct phy_dm_struct *phydm, u8 *phy_status,
>  	/* Update signal strength to UI, and phy_info->rx_pwdb_all is the
>  	 * maximum RSSI of all path
>  	 */
> -	phy_info->signal_strength =
> -		(u8)(odm_signal_scale_mapping(phydm, phy_info->rx_pwdb_all));
> +	phy_info->signal_strength = (u8)phy_info->rx_pwdb_all;
>
>  	/* Calculate average RSSI and smoothed RSSI */
>  	phydm_process_rssi_for_dm_new_type(phydm, phy_info, pktinfo);
> diff --git a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.h b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.h
> index 6ad5e0292a97..c9833889688c 100644
> --- a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.h
> +++ b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.h
> @@ -216,8 +216,6 @@ odm_config_fw_with_header_file(struct phy_dm_struct *dm,
>
>  u32 odm_get_hw_img_version(struct phy_dm_struct *dm);
>
> -s32 odm_signal_scale_mapping(struct phy_dm_struct *dm, s32 curr_sig);
> -
>  /*For 8822B only!! need to move to FW finally */
>  /*==============================================*/
>  void phydm_rx_phy_status_new_type(struct phy_dm_struct *phydm, u8 *phy_status,
> --
> 2.17.1
>
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Re: [Outreachy kernel] [PATCH 2/3] staging: rtlwifi: Remove function that only returns zero

[Maya Nakamura]

On Thu, Oct 25, 2018 at 03:24:32PM +0100, Julia Lawall wrote:
> 
> 
> On Wed, 24 Oct 2018, Maya Nakamura wrote:
> 
> > Because the odm_sq_process_patch_rt_cid_819x_lenovo function is only
> > called to return zero, remove the unnecessary function and change one
> > statement that calls it. Issue found by Coccinelle's semantic patch
> > results for returnvar.cocci.
> >
> > Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com>
> > ---
> >  drivers/staging/rtlwifi/phydm/phydm_hwconfig.c | 11 +----------
> >  1 file changed, 1 insertion(+), 10 deletions(-)
> >
> > diff --git a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
> > index fd208581d857..335a435caa2c 100644
> > --- a/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
> > +++ b/drivers/staging/rtlwifi/phydm/phydm_hwconfig.c
> > @@ -477,14 +477,6 @@ static u8 odm_query_rx_pwr_percentage(s8 ant_power)
> >  		return 100 + ant_power;
> >  }
> >
> > -static u8 odm_sq_process_patch_rt_cid_819x_lenovo(struct phy_dm_struct *dm,
> > -						  u8 is_cck_rate, u8 pwdb_all,
> > -						  u8 path, u8 RSSI)
> > -{
> > -	u8 sq = 0;
> > -	return sq;
> > -}
> > -
> >  static u8 odm_evm_db_to_percentage(s8 value)
> >  {
> >  	/* -33dB~0dB to 0%~99% */
> > @@ -891,8 +883,7 @@ static void odm_rx_phy_status_jaguar_series_parsing(
> >
> >  			if ((dm->support_platform == ODM_WIN) &&
> >  			    (dm->patch_id == RT_CID_819X_LENOVO))
> > -				sq = odm_sq_process_patch_rt_cid_819x_lenovo(
> > -					dm, is_cck_rate, pwdb_all, 0, 0);
> > +				sq = 0;
> >  			else
> >  				sq = phydm_get_signal_quality_8812(phy_info, dm,
> >  								   phy_sta_rpt);
> 
> Would it be better to just put u8 sq = 0; ?  Then you could negate the
> condition and drop one of the branches.
> 
> julia

Thank you for teaching me, Julia! I will try to change this and the
other (1/3) and resubmit the set.

Maya

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