[PATCH 0/5] staging: r8188eu: another round of cleanups

[PATCH 0/5] staging: r8188eu: another round of cleanups

[Martin Kaiser]

This series simplifies the issue_probereq_ex function and fixes other
minor things.

Martin Kaiser (5):
  staging: r8188eu: drop return value from issue_probereq_ex
  staging: r8188eu: remove wait_ms parameter
  staging: r8188eu: fix the number of probereq retries
  staging: r8188eu: simplify the checks for zero address
  staging: r8188eu: use ieee80211 helper for protected bit

 drivers/staging/r8188eu/core/rtw_mlme_ext.c   | 30 ++++++-------------
 drivers/staging/r8188eu/core/rtw_recv.c       |  5 ++--
 .../staging/r8188eu/include/rtw_mlme_ext.h    |  3 +-
 drivers/staging/r8188eu/include/wifi.h        |  3 --
 4 files changed, 12 insertions(+), 29 deletions(-)

-- 
2.30.2

[PATCH 1/5] staging: r8188eu: drop return value from issue_probereq_ex

[Martin Kaiser]

The only caller of issue_probereq_ex does not check the return value. We
can remove it and make issue_probereq_ex a void function.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
---
 drivers/staging/r8188eu/core/rtw_mlme_ext.c    | 11 ++---------
 drivers/staging/r8188eu/include/rtw_mlme_ext.h |  4 ++--
 2 files changed, 4 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_mlme_ext.c b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
index 161cb67f7882..2f3f7da08d0c 100644
--- a/drivers/staging/r8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
@@ -4482,8 +4482,8 @@ inline void issue_probereq(struct adapter *padapter, struct ndis_802_11_ssid *ps
 	_issue_probereq(padapter, pssid, da, false);
 }
 
-int issue_probereq_ex(struct adapter *padapter, struct ndis_802_11_ssid *pssid, u8 *da,
-	int try_cnt, int wait_ms)
+void issue_probereq_ex(struct adapter *padapter, struct ndis_802_11_ssid *pssid, u8 *da,
+		       int try_cnt, int wait_ms)
 {
 	int ret;
 	int i = 0;
@@ -4497,13 +4497,6 @@ int issue_probereq_ex(struct adapter *padapter, struct ndis_802_11_ssid *pssid,
 			msleep(wait_ms);
 
 	} while ((i < try_cnt) && ((ret == _FAIL) || (wait_ms == 0)));
-
-	if (ret != _FAIL) {
-		ret = _SUCCESS;
-		goto exit;
-	}
-exit:
-	return ret;
 }
 
 /*  if psta == NULL, indicate we are station (client) now... */
diff --git a/drivers/staging/r8188eu/include/rtw_mlme_ext.h b/drivers/staging/r8188eu/include/rtw_mlme_ext.h
index c46fc1a53085..720610bc8fef 100644
--- a/drivers/staging/r8188eu/include/rtw_mlme_ext.h
+++ b/drivers/staging/r8188eu/include/rtw_mlme_ext.h
@@ -512,8 +512,8 @@ void issue_auth(struct adapter *padapter, struct sta_info *psta,
 		unsigned short status);
 void issue_probereq(struct adapter *padapter, struct ndis_802_11_ssid *pssid,
 		    u8 *da);
-s32 issue_probereq_ex(struct adapter *adapter, struct ndis_802_11_ssid *pssid,
-		      u8 *da, int try_cnt, int wait_ms);
+void issue_probereq_ex(struct adapter *adapter, struct ndis_802_11_ssid *pssid,
+		       u8 *da, int try_cnt, int wait_ms);
 int issue_nulldata(struct adapter *padapter, unsigned char *da,
 		   unsigned int power_mode, int try_cnt, int wait_ms);
 int issue_qos_nulldata(struct adapter *padapter, unsigned char *da,
-- 
2.30.2

[PATCH 2/5] staging: r8188eu: remove wait_ms parameter

[Martin Kaiser]

Remove the wait_ms parameter from function issue_probereq_ex. There's only
one caller, who requests a waiting time of 1 ms.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
---
 drivers/staging/r8188eu/core/rtw_mlme_ext.c    | 12 ++++++------
 drivers/staging/r8188eu/include/rtw_mlme_ext.h |  2 +-
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_mlme_ext.c b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
index 2f3f7da08d0c..990336244030 100644
--- a/drivers/staging/r8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
@@ -4483,20 +4483,20 @@ inline void issue_probereq(struct adapter *padapter, struct ndis_802_11_ssid *ps
 }
 
 void issue_probereq_ex(struct adapter *padapter, struct ndis_802_11_ssid *pssid, u8 *da,
-		       int try_cnt, int wait_ms)
+		       int try_cnt)
 {
 	int ret;
 	int i = 0;
 
 	do {
-		ret = _issue_probereq(padapter, pssid, da, wait_ms > 0);
+		ret = _issue_probereq(padapter, pssid, da, true);
 
 		i++;
 
-		if (i < try_cnt && wait_ms > 0 && ret == _FAIL)
-			msleep(wait_ms);
+		if (i < try_cnt && ret == _FAIL)
+			msleep(1);
 
-	} while ((i < try_cnt) && ((ret == _FAIL) || (wait_ms == 0)));
+	} while ((i < try_cnt) && (ret == _FAIL));
 }
 
 /*  if psta == NULL, indicate we are station (client) now... */
@@ -7046,7 +7046,7 @@ void linked_status_chk(struct adapter *padapter)
 				}
 
 				if (rx_chk != _SUCCESS)
-					issue_probereq_ex(padapter, &pmlmeinfo->network.Ssid, psta->hwaddr, 3, 1);
+					issue_probereq_ex(padapter, &pmlmeinfo->network.Ssid, psta->hwaddr, 3);
 
 				if ((tx_chk != _SUCCESS && pmlmeinfo->link_count++ == 0xf) || rx_chk != _SUCCESS) {
 					tx_chk = issue_nulldata(padapter, psta->hwaddr, 0, 3, 1);
diff --git a/drivers/staging/r8188eu/include/rtw_mlme_ext.h b/drivers/staging/r8188eu/include/rtw_mlme_ext.h
index 720610bc8fef..04fd673d3a04 100644
--- a/drivers/staging/r8188eu/include/rtw_mlme_ext.h
+++ b/drivers/staging/r8188eu/include/rtw_mlme_ext.h
@@ -513,7 +513,7 @@ void issue_auth(struct adapter *padapter, struct sta_info *psta,
 void issue_probereq(struct adapter *padapter, struct ndis_802_11_ssid *pssid,
 		    u8 *da);
 void issue_probereq_ex(struct adapter *adapter, struct ndis_802_11_ssid *pssid,
-		       u8 *da, int try_cnt, int wait_ms);
+		       u8 *da, int try_cnt);
 int issue_nulldata(struct adapter *padapter, unsigned char *da,
 		   unsigned int power_mode, int try_cnt, int wait_ms);
 int issue_qos_nulldata(struct adapter *padapter, unsigned char *da,
-- 
2.30.2

[PATCH 3/5] staging: r8188eu: fix the number of probereq retries

[Martin Kaiser]

issue_probereq_ex sends a probe request and retries if this fails. There's
no point in making the number of retries configurable. Hard-code the value
that's used by issue_probereq_ex's only caller.

Simplify the code to check the loop condition only once.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
---
 drivers/staging/r8188eu/core/rtw_mlme_ext.c   | 21 +++++++------------
 .../staging/r8188eu/include/rtw_mlme_ext.h    |  3 +--
 2 files changed, 9 insertions(+), 15 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_mlme_ext.c b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
index 990336244030..667f54e313ef 100644
--- a/drivers/staging/r8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
@@ -4482,21 +4482,16 @@ inline void issue_probereq(struct adapter *padapter, struct ndis_802_11_ssid *ps
 	_issue_probereq(padapter, pssid, da, false);
 }
 
-void issue_probereq_ex(struct adapter *padapter, struct ndis_802_11_ssid *pssid, u8 *da,
-		       int try_cnt)
+void issue_probereq_ex(struct adapter *padapter, struct ndis_802_11_ssid *pssid, u8 *da)
 {
-	int ret;
-	int i = 0;
-
-	do {
-		ret = _issue_probereq(padapter, pssid, da, true);
-
-		i++;
+	int i;
 
-		if (i < try_cnt && ret == _FAIL)
+	for (i = 0; i < 3; i++) {
+		if (_issue_probereq(padapter, pssid, da, true) == _FAIL)
 			msleep(1);
-
-	} while ((i < try_cnt) && (ret == _FAIL));
+		else
+			break;
+	}
 }
 
 /*  if psta == NULL, indicate we are station (client) now... */
@@ -7046,7 +7041,7 @@ void linked_status_chk(struct adapter *padapter)
 				}
 
 				if (rx_chk != _SUCCESS)
-					issue_probereq_ex(padapter, &pmlmeinfo->network.Ssid, psta->hwaddr, 3);
+					issue_probereq_ex(padapter, &pmlmeinfo->network.Ssid, psta->hwaddr);
 
 				if ((tx_chk != _SUCCESS && pmlmeinfo->link_count++ == 0xf) || rx_chk != _SUCCESS) {
 					tx_chk = issue_nulldata(padapter, psta->hwaddr, 0, 3, 1);
diff --git a/drivers/staging/r8188eu/include/rtw_mlme_ext.h b/drivers/staging/r8188eu/include/rtw_mlme_ext.h
index 04fd673d3a04..089bd5446773 100644
--- a/drivers/staging/r8188eu/include/rtw_mlme_ext.h
+++ b/drivers/staging/r8188eu/include/rtw_mlme_ext.h
@@ -512,8 +512,7 @@ void issue_auth(struct adapter *padapter, struct sta_info *psta,
 		unsigned short status);
 void issue_probereq(struct adapter *padapter, struct ndis_802_11_ssid *pssid,
 		    u8 *da);
-void issue_probereq_ex(struct adapter *adapter, struct ndis_802_11_ssid *pssid,
-		       u8 *da, int try_cnt);
+void issue_probereq_ex(struct adapter *padapter, struct ndis_802_11_ssid *pssid, u8 *da);
 int issue_nulldata(struct adapter *padapter, unsigned char *da,
 		   unsigned int power_mode, int try_cnt, int wait_ms);
 int issue_qos_nulldata(struct adapter *padapter, unsigned char *da,
-- 
2.30.2

[PATCH 4/5] staging: r8188eu: simplify the checks for zero address

[Martin Kaiser]

In function ap2sta_data_frame, we can use is_zero_ether_addr to check for
all-zero ethernet addresses. Both pattrib->bssid and mybssid are 16-bit
aligned.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
---
 drivers/staging/r8188eu/core/rtw_recv.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_recv.c b/drivers/staging/r8188eu/core/rtw_recv.c
index 5b0a66aebff1..631c500dda42 100644
--- a/drivers/staging/r8188eu/core/rtw_recv.c
+++ b/drivers/staging/r8188eu/core/rtw_recv.c
@@ -779,9 +779,8 @@ static int ap2sta_data_frame(
 		}
 
 		/*  check BSSID */
-		if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
-		    !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
-		     (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) {
+		if (is_zero_ether_addr(pattrib->bssid) || is_zero_ether_addr(mybssid) ||
+		    (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) {
 			if (!bmcast)
 				issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 
-- 
2.30.2

[PATCH 5/5] staging: r8188eu: use ieee80211 helper for protected bit

[Martin Kaiser]

Use ieee80211_has_protected to check if the "protected" bit is set. Remove
the r8188eu driver's internal macro for this check.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
---
 drivers/staging/r8188eu/core/rtw_mlme_ext.c | 2 +-
 drivers/staging/r8188eu/include/wifi.h      | 3 ---
 2 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_mlme_ext.c b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
index 667f54e313ef..93696892ec7d 100644
--- a/drivers/staging/r8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
@@ -809,7 +809,7 @@ static void OnAuthClient(struct adapter *padapter, struct recv_frame *precv_fram
 	if (!(pmlmeinfo->state & WIFI_FW_AUTH_STATE))
 		return;
 
-	offset = (GetPrivacy(pframe)) ? 4 : 0;
+	offset = ieee80211_has_protected(hdr->frame_control) ? 4 : 0;
 
 	seq	= le16_to_cpu(*(__le16 *)((size_t)pframe + WLAN_HDR_A3_LEN + offset + 2));
 	status	= le16_to_cpu(*(__le16 *)((size_t)pframe + WLAN_HDR_A3_LEN + offset + 4));
diff --git a/drivers/staging/r8188eu/include/wifi.h b/drivers/staging/r8188eu/include/wifi.h
index 2381c519ceaf..254a4bc1a141 100644
--- a/drivers/staging/r8188eu/include/wifi.h
+++ b/drivers/staging/r8188eu/include/wifi.h
@@ -170,9 +170,6 @@ enum WIFI_REG_DOMAIN {
 #define SetPrivacy(pbuf)	\
 	*(__le16 *)(pbuf) |= cpu_to_le16(_PRIVACY_)
 
-#define GetPrivacy(pbuf)					\
-	(((*(__le16 *)(pbuf)) & cpu_to_le16(_PRIVACY_)) != 0)
-
 #define GetFrameType(pbuf)				\
 	(le16_to_cpu(*(__le16 *)(pbuf)) & (BIT(3) | BIT(2)))
 
-- 
2.30.2

Re: [PATCH 0/5] staging: r8188eu: another round of cleanups

[Philipp Hortmann]

On 11/26/22 16:42, Martin Kaiser wrote:
> This series simplifies the issue_probereq_ex function and fixes other
> minor things.
> 
> Martin Kaiser (5):
>    staging: r8188eu: drop return value from issue_probereq_ex
>    staging: r8188eu: remove wait_ms parameter
>    staging: r8188eu: fix the number of probereq retries
>    staging: r8188eu: simplify the checks for zero address
>    staging: r8188eu: use ieee80211 helper for protected bit
> 
>   drivers/staging/r8188eu/core/rtw_mlme_ext.c   | 30 ++++++-------------
>   drivers/staging/r8188eu/core/rtw_recv.c       |  5 ++--
>   .../staging/r8188eu/include/rtw_mlme_ext.h    |  3 +-
>   drivers/staging/r8188eu/include/wifi.h        |  3 --
>   4 files changed, 12 insertions(+), 29 deletions(-)
> 
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150