[PATCH v4 00/23] staging: r8188eu: remove unneeded ret variables

[PATCH v4 00/23] staging: r8188eu: remove unneeded ret variables

[Abdun Nihaal]

This patchset does the following to functions in ioctl_linux.c:
- Remove unneeded return variable in some functions.
  These functions cannot be converted to void either because it is an
  iw_handler function or the function does return error code.
- Propagate error code in rtw_p2p_get2 function
- Convert some functions that always return 0 to return void

v3 -> v4:
- Split the changes into smaller patches to make it easier to review
- Add a new patch to propagate error code in rtw_p2p_get2 function

v2 -> v3:
- Remove returns at the end of void functions to conform to coding style

v1 -> v2:
- As suggested by Greg, change functions that always return 0
  and whose return value is not used, to return void instead.
- Not removing return variables in rtw_p2p_get2 and rtw_p2p_set
  as they may need to be used.

Abdun Nihaal (23):
  staging: r8188eu: remove unneeded variable in rtw_wx_get_essid
  staging: r8188eu: remove unneeded variable in rtw_wx_get_enc
  staging: r8188eu: remove unneeded variable in rtw_p2p_get
  staging: r8188eu: remove unneeded variable in
    rtw_p2p_get_wps_configmethod
  staging: r8188eu: remove unneeded variable in
    rtw_p2p_get_go_device_address
  staging: r8188eu: remove unneeded variable in rtw_p2p_get_device_type
  staging: r8188eu: remove unneeded variable in rtw_p2p_get_device_name
  staging: r8188eu: remove unneeded variable in
    rtw_p2p_get_invitation_procedure
  staging: r8188eu: propagate error code in rtw_p2p_get2
  staging: r8188eu: convert rtw_p2p_set_go_nego_ssid to return void
  staging: r8188eu: convert rtw_p2p_setDN to return void
  staging: r8188eu: convert rtw_p2p_get_status to return void
  staging: r8188eu: convert rtw_p2p_get_req_cm to return void
  staging: r8188eu: convert rtw_p2p_get_role to return void
  staging: r8188eu: convert rtw_p2p_get_peer_ifaddr to return void
  staging: r8188eu: convert rtw_p2p_get_peer_devaddr to return void
  staging: r8188eu: convert rtw_p2p_get_peer_devaddr_by_invitation to
    return void
  staging: r8188eu: convert rtw_p2p_get_groupid to return void
  staging: r8188eu: convert rtw_p2p_get_op_ch to return void
  staging: r8188eu: convert rtw_p2p_invite_req to return void
  staging: r8188eu: convert rtw_p2p_set_persistent to return void
  staging: r8188eu: convert rtw_p2p_prov_disc to return void
  staging: r8188eu: convert rtw_p2p_got_wpsinfo to return void

 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 155 +++++++------------
 1 file changed, 59 insertions(+), 96 deletions(-)

-- 
2.34.1

[PATCH v4 01/23] staging: r8188eu: remove unneeded variable in rtw_wx_get_essid

[Abdun Nihaal]

Remove unneeded return variable that is initialized to 0 and not
assigned after.

Found using Coccinelle
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index b9f9698d70cf..3a60e1f81592 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -1383,7 +1383,7 @@ static int rtw_wx_get_essid(struct net_device *dev,
 			      struct iw_request_info *a,
 			      union iwreq_data *wrqu, char *extra)
 {
-	u32 len, ret = 0;
+	u32 len;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct	mlme_priv	*pmlmepriv = &padapter->mlmepriv;
 	struct wlan_bssid_ex  *pcur_bss = &pmlmepriv->cur_network.network;
@@ -1399,7 +1399,7 @@ static int rtw_wx_get_essid(struct net_device *dev,
 	wrqu->essid.length = len;
 	wrqu->essid.flags = 1;
 
-	return ret;
+	return 0;
 }
 
 static int rtw_wx_set_rate(struct net_device *dev,
-- 
2.34.1

[PATCH v4 02/23] staging: r8188eu: remove unneeded variable in rtw_wx_get_enc

[Abdun Nihaal]

Remove unneeded return variable that is initialized to 0 and not
assigned after.

Found using Coccinelle
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index 3a60e1f81592..f99942417a71 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -1717,7 +1717,7 @@ static int rtw_wx_get_enc(struct net_device *dev,
 			    struct iw_request_info *info,
 			    union iwreq_data *wrqu, char *keybuf)
 {
-	uint key, ret = 0;
+	uint key;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct iw_point *erq = &wrqu->encoding;
 	struct	mlme_priv	*pmlmepriv = &padapter->mlmepriv;
@@ -1778,7 +1778,7 @@ static int rtw_wx_get_enc(struct net_device *dev,
 	}
 
 
-	return ret;
+	return 0;
 }
 
 static int rtw_wx_get_power(struct net_device *dev,
-- 
2.34.1

[PATCH v4 03/23] staging: r8188eu: remove unneeded variable in rtw_p2p_get

[Abdun Nihaal]

Remove unneeded return variable that is initialized to 0 and not
assigned after.

Found using Coccinelle
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index f99942417a71..bc5c8454ebcf 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -3422,8 +3422,6 @@ static int rtw_p2p_get(struct net_device *dev,
 			       struct iw_request_info *info,
 			       union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
-
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 
 	if (padapter->bShowGetP2PState)
@@ -3447,7 +3445,7 @@ static int rtw_p2p_get(struct net_device *dev,
 	} else if (!memcmp(wrqu->data.pointer, "op_ch", 5)) {
 		rtw_p2p_get_op_ch(dev, info, wrqu, extra);
 	}
-	return ret;
+	return 0;
 }
 
 static int rtw_p2p_get2(struct net_device *dev,
-- 
2.34.1

[PATCH v4 04/23] staging: r8188eu: remove unneeded variable in rtw_p2p_get_wps_configmethod

[Abdun Nihaal]

Remove unneeded return variable that is initialized to 0 and not
assigned after.

Found using Coccinelle
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index bc5c8454ebcf..b0f78673d9b7 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -2620,7 +2620,6 @@ static int rtw_p2p_get_wps_configmethod(struct net_device *dev,
 			       struct iw_request_info *info,
 			       union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	u8 peerMAC[ETH_ALEN] = {0x00};
 	int jj, kk;
@@ -2681,7 +2680,7 @@ static int rtw_p2p_get_wps_configmethod(struct net_device *dev,
 
 	if (copy_to_user(wrqu->data.pointer, attr_content_str, 6 + 17))
 		return -EFAULT;
-	return ret;
+	return 0;
 }
 
 static int rtw_p2p_get_go_device_address(struct net_device *dev,
-- 
2.34.1

[PATCH v4 05/23] staging: r8188eu: remove unneeded variable in rtw_p2p_get_go_device_address

[Abdun Nihaal]

Remove unneeded return variable that is initialized to 0 and not
assigned after.

Found using Coccinelle
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index b0f78673d9b7..b093430ff744 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -2687,7 +2687,6 @@ static int rtw_p2p_get_go_device_address(struct net_device *dev,
 			       struct iw_request_info *info,
 			       union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	u8 peerMAC[ETH_ALEN] = {0x00};
 	int jj, kk;
@@ -2763,7 +2762,7 @@ static int rtw_p2p_get_go_device_address(struct net_device *dev,
 
 	if (copy_to_user(wrqu->data.pointer, go_devadd_str, 10 + 17))
 		return -EFAULT;
-	return ret;
+	return 0;
 }
 
 static int rtw_p2p_get_device_type(struct net_device *dev,
-- 
2.34.1

[PATCH v4 06/23] staging: r8188eu: remove unneeded variable in rtw_p2p_get_device_type

[Abdun Nihaal]

Remove unneeded return variable that is initialized to 0 and not
assigned after.

Found using Coccinelle
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index b093430ff744..6d72b15541ab 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -2769,7 +2769,6 @@ static int rtw_p2p_get_device_type(struct net_device *dev,
 			       struct iw_request_info *info,
 			       union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	u8 peerMAC[ETH_ALEN] = {0x00};
 	int jj, kk;
@@ -2838,7 +2837,7 @@ static int rtw_p2p_get_device_type(struct net_device *dev,
 		return -EFAULT;
 	}
 
-	return ret;
+	return 0;
 }
 
 static int rtw_p2p_get_device_name(struct net_device *dev,
-- 
2.34.1

[PATCH v4 07/23] staging: r8188eu: remove unneeded variable in rtw_p2p_get_device_name

[Abdun Nihaal]

Remove unneeded return variable that is initialized to 0 and not
assigned after.

Found using Coccinelle
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index 6d72b15541ab..33fe8e944df4 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -2844,7 +2844,6 @@ static int rtw_p2p_get_device_name(struct net_device *dev,
 			       struct iw_request_info *info,
 			       union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	u8 peerMAC[ETH_ALEN] = {0x00};
 	int jj, kk;
@@ -2903,7 +2902,7 @@ static int rtw_p2p_get_device_name(struct net_device *dev,
 
 	if (copy_to_user(wrqu->data.pointer, dev_name_str, 5 + ((dev_len > 17) ? dev_len : 17)))
 		return -EFAULT;
-	return ret;
+	return 0;
 }
 
 static int rtw_p2p_get_invitation_procedure(struct net_device *dev,
-- 
2.34.1

[PATCH v4 08/23] staging: r8188eu: remove unneeded variable in rtw_p2p_get_invitation_procedure

[Abdun Nihaal]

Remove unneeded return variable that is initialized to 0 and not
assigned after.

Found using Coccinelle
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index 33fe8e944df4..35f7ba66a7cf 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -2909,7 +2909,6 @@ static int rtw_p2p_get_invitation_procedure(struct net_device *dev,
 			       struct iw_request_info *info,
 			       union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	u8 peerMAC[ETH_ALEN] = {0x00};
 	int jj, kk;
@@ -2978,7 +2977,7 @@ static int rtw_p2p_get_invitation_procedure(struct net_device *dev,
 	}
 	if (copy_to_user(wrqu->data.pointer, inv_proc_str, 8 + 17))
 		return -EFAULT;
-	return ret;
+	return 0;
 }
 
 static int rtw_p2p_connect(struct net_device *dev,
-- 
2.34.1

[PATCH v4 09/23] staging: r8188eu: propagate error code in rtw_p2p_get2

[Abdun Nihaal]

rtw_p2p_get2 calls functions that can fail with -EFAULT.
Return the error code from the called functions.

Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
- Newly added in V4

 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index 35f7ba66a7cf..99c7f9369d2a 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -3452,19 +3452,19 @@ static int rtw_p2p_get2(struct net_device *dev,
 	DBG_88E("[%s] extra = %s\n", __func__, (char *)wrqu->data.pointer);
 	if (!memcmp(extra, "wpsCM =", 6)) {
 		wrqu->data.length -= 6;
-		rtw_p2p_get_wps_configmethod(dev, info, wrqu,  &extra[6]);
+		ret = rtw_p2p_get_wps_configmethod(dev, info, wrqu,  &extra[6]);
 	} else if (!memcmp(extra, "devN =", 5)) {
 		wrqu->data.length -= 5;
-		rtw_p2p_get_device_name(dev, info, wrqu, &extra[5]);
+		ret = rtw_p2p_get_device_name(dev, info, wrqu, &extra[5]);
 	} else if (!memcmp(extra, "dev_type =", 9)) {
 		wrqu->data.length -= 9;
-		rtw_p2p_get_device_type(dev, info, wrqu, &extra[9]);
+		ret = rtw_p2p_get_device_type(dev, info, wrqu, &extra[9]);
 	} else if (!memcmp(extra, "go_devadd =", 10)) {
 		wrqu->data.length -= 10;
-		rtw_p2p_get_go_device_address(dev, info, wrqu, &extra[10]);
+		ret = rtw_p2p_get_go_device_address(dev, info, wrqu, &extra[10]);
 	} else if (!memcmp(extra, "InvProc =", 8)) {
 		wrqu->data.length -= 8;
-		rtw_p2p_get_invitation_procedure(dev, info, wrqu, &extra[8]);
+		ret = rtw_p2p_get_invitation_procedure(dev, info, wrqu, &extra[8]);
 	}
 
 	return ret;
-- 
2.34.1

[PATCH v4 10/23] staging: r8188eu: convert rtw_p2p_set_go_nego_ssid to return void

[Abdun Nihaal]

rtw_p2p_set_go_nego_ssid always returns 0 and it's return value is not
used. Convert it to return void.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index 99c7f9369d2a..c761c06cf6e8 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -2308,19 +2308,16 @@ static int rtw_wext_p2p_enable(struct net_device *dev,
 	return ret;
 }
 
-static int rtw_p2p_set_go_nego_ssid(struct net_device *dev,
-			       struct iw_request_info *info,
-			       union iwreq_data *wrqu, char *extra)
+static void rtw_p2p_set_go_nego_ssid(struct net_device *dev,
+				     struct iw_request_info *info,
+				     union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 
 	DBG_88E("[%s] ssid = %s, len = %zu\n", __func__, extra, strlen(extra));
 	memcpy(pwdinfo->nego_ssid, extra, strlen(extra));
 	pwdinfo->nego_ssidlen = strlen(extra);
-
-	return ret;
 }
 
 static int rtw_p2p_set_intent(struct net_device *dev,
-- 
2.34.1

[PATCH v4 11/23] staging: r8188eu: convert rtw_p2p_setDN to return void

[Abdun Nihaal]

rtw_p2p_setDN always returns 0 and it's return value is not used.
Convert it to return void.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index c761c06cf6e8..daaf808ca23e 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -2453,11 +2453,10 @@ static int rtw_p2p_profilefound(struct net_device *dev,
 	return ret;
 }
 
-static int rtw_p2p_setDN(struct net_device *dev,
-			       struct iw_request_info *info,
-			       union iwreq_data *wrqu, char *extra)
+static void rtw_p2p_setDN(struct net_device *dev,
+			  struct iw_request_info *info,
+			  union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 
@@ -2465,8 +2464,6 @@ static int rtw_p2p_setDN(struct net_device *dev,
 	memset(pwdinfo->device_name, 0x00, WPS_MAX_DEVICE_NAME_LEN);
 	memcpy(pwdinfo->device_name, extra, wrqu->data.length - 1);
 	pwdinfo->device_name_len = wrqu->data.length - 1;
-
-	return ret;
 }
 
 static int rtw_p2p_get_status(struct net_device *dev,
-- 
2.34.1

[PATCH v4 12/23] staging: r8188eu: convert rtw_p2p_get_status to return void

[Abdun Nihaal]

rtw_p2p_get_status always returns 0 and it's return value is not used.
Convert it to return void.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index daaf808ca23e..d2db2117abc3 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -2466,11 +2466,10 @@ static void rtw_p2p_setDN(struct net_device *dev,
 	pwdinfo->device_name_len = wrqu->data.length - 1;
 }
 
-static int rtw_p2p_get_status(struct net_device *dev,
+static void rtw_p2p_get_status(struct net_device *dev,
 			       struct iw_request_info *info,
 			       union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 
@@ -2484,8 +2483,6 @@ static int rtw_p2p_get_status(struct net_device *dev,
 	/*	About the "Role" information, we will use the new private IOCTL to get the "Role" information. */
 	sprintf(extra, "\n\nStatus =%.2d\n", rtw_p2p_state(pwdinfo));
 	wrqu->data.length = strlen(extra);
-
-	return ret;
 }
 
 /*	Commented by Albert 20110520 */
-- 
2.34.1

[PATCH v4 13/23] staging: r8188eu: convert rtw_p2p_get_req_cm to return void

[Abdun Nihaal]

rtw_p2p_get_req_cm always returns 0 and it's return value is not used.
Convert it to return void.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index d2db2117abc3..ba0f42ca36e3 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -2490,17 +2490,15 @@ static void rtw_p2p_get_status(struct net_device *dev,
 /*	This config method description will show us which config method the remote P2P device is intended to use */
 /*	by sending the provisioning discovery request frame. */
 
-static int rtw_p2p_get_req_cm(struct net_device *dev,
+static void rtw_p2p_get_req_cm(struct net_device *dev,
 			       struct iw_request_info *info,
 			       union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 
 	sprintf(extra, "\n\nCM =%s\n", pwdinfo->rx_prov_disc_info.strconfig_method_desc_of_prov_disc_req);
 	wrqu->data.length = strlen(extra);
-	return ret;
 }
 
 static int rtw_p2p_get_role(struct net_device *dev,
-- 
2.34.1

[PATCH v4 14/23] staging: r8188eu: convert rtw_p2p_get_role to return void

[Abdun Nihaal]

rtw_p2p_get_role always returns 0 and it's return value is not used.
Convert it to return void.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index ba0f42ca36e3..343b4ad6ce65 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -2501,11 +2501,10 @@ static void rtw_p2p_get_req_cm(struct net_device *dev,
 	wrqu->data.length = strlen(extra);
 }
 
-static int rtw_p2p_get_role(struct net_device *dev,
-			       struct iw_request_info *info,
-			       union iwreq_data *wrqu, char *extra)
+static void rtw_p2p_get_role(struct net_device *dev,
+			     struct iw_request_info *info,
+			     union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 
@@ -2515,7 +2514,6 @@ static int rtw_p2p_get_role(struct net_device *dev,
 
 	sprintf(extra, "\n\nRole =%.2d\n", rtw_p2p_role(pwdinfo));
 	wrqu->data.length = strlen(extra);
-	return ret;
 }
 
 static int rtw_p2p_get_peer_ifaddr(struct net_device *dev,
-- 
2.34.1

[PATCH v4 15/23] staging: r8188eu: convert rtw_p2p_get_peer_ifaddr to return void

[Abdun Nihaal]

rtw_p2p_get_peer_ifaddr always returns 0 and it's return value is not used.
Convert it to return void.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index 343b4ad6ce65..1f89f4fe4d8e 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -2516,11 +2516,10 @@ static void rtw_p2p_get_role(struct net_device *dev,
 	wrqu->data.length = strlen(extra);
 }
 
-static int rtw_p2p_get_peer_ifaddr(struct net_device *dev,
-			       struct iw_request_info *info,
-			       union iwreq_data *wrqu, char *extra)
+static void rtw_p2p_get_peer_ifaddr(struct net_device *dev,
+				    struct iw_request_info *info,
+				    union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 
@@ -2530,7 +2529,6 @@ static int rtw_p2p_get_peer_ifaddr(struct net_device *dev,
 	sprintf(extra, "\nMAC %pM",
 		pwdinfo->p2p_peer_interface_addr);
 	wrqu->data.length = strlen(extra);
-	return ret;
 }
 
 static int rtw_p2p_get_peer_devaddr(struct net_device *dev,
-- 
2.34.1

[PATCH v4 16/23] staging: r8188eu: convert rtw_p2p_get_peer_devaddr to return void

[Abdun Nihaal]

rtw_p2p_get_peer_devaddr always returns 0 and it's return value is not
used. Convert it to return void.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index 1f89f4fe4d8e..dfd19a649803 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -2531,12 +2531,11 @@ static void rtw_p2p_get_peer_ifaddr(struct net_device *dev,
 	wrqu->data.length = strlen(extra);
 }
 
-static int rtw_p2p_get_peer_devaddr(struct net_device *dev,
-			       struct iw_request_info *info,
-			       union iwreq_data *wrqu, char *extra)
+static void rtw_p2p_get_peer_devaddr(struct net_device *dev,
+				     struct iw_request_info *info,
+				     union iwreq_data *wrqu, char *extra)
 
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 
@@ -2546,7 +2545,6 @@ static int rtw_p2p_get_peer_devaddr(struct net_device *dev,
 	sprintf(extra, "\n%pM",
 		pwdinfo->rx_prov_disc_info.peerDevAddr);
 	wrqu->data.length = strlen(extra);
-	return ret;
 }
 
 static int rtw_p2p_get_peer_devaddr_by_invitation(struct net_device *dev,
-- 
2.34.1

[PATCH v4 17/23] staging: r8188eu: convert rtw_p2p_get_peer_devaddr_by_invitation to return void

[Abdun Nihaal]

rtw_p2p_get_peer_devaddr_by_invitation always returns 0 and it's return
value is not used. Convert it to return void.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index dfd19a649803..9ee647de5ba7 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -2547,12 +2547,12 @@ static void rtw_p2p_get_peer_devaddr(struct net_device *dev,
 	wrqu->data.length = strlen(extra);
 }
 
-static int rtw_p2p_get_peer_devaddr_by_invitation(struct net_device *dev,
-			       struct iw_request_info *info,
-			       union iwreq_data *wrqu, char *extra)
+static void rtw_p2p_get_peer_devaddr_by_invitation(struct net_device *dev,
+						   struct iw_request_info *info,
+						   union iwreq_data *wrqu,
+						   char *extra)
 
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 
@@ -2562,7 +2562,6 @@ static int rtw_p2p_get_peer_devaddr_by_invitation(struct net_device *dev,
 	sprintf(extra, "\nMAC %pM",
 		pwdinfo->p2p_peer_device_addr);
 	wrqu->data.length = strlen(extra);
-	return ret;
 }
 
 static int rtw_p2p_get_groupid(struct net_device *dev,
-- 
2.34.1

[PATCH v4 18/23] staging: r8188eu: convert rtw_p2p_get_groupid to return void

[Abdun Nihaal]

rtw_p2p_get_groupid always returns 0 and it's return value is not used.
Convert it to return void.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index 9ee647de5ba7..4c47e9bb7fc3 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -2564,12 +2564,11 @@ static void rtw_p2p_get_peer_devaddr_by_invitation(struct net_device *dev,
 	wrqu->data.length = strlen(extra);
 }
 
-static int rtw_p2p_get_groupid(struct net_device *dev,
-			       struct iw_request_info *info,
-			       union iwreq_data *wrqu, char *extra)
+static void rtw_p2p_get_groupid(struct net_device *dev,
+				struct iw_request_info *info,
+				union iwreq_data *wrqu, char *extra)
 
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 
@@ -2579,7 +2578,6 @@ static int rtw_p2p_get_groupid(struct net_device *dev,
 		pwdinfo->groupid_info.go_device_addr[4], pwdinfo->groupid_info.go_device_addr[5],
 		pwdinfo->groupid_info.ssid);
 	wrqu->data.length = strlen(extra);
-	return ret;
 }
 
 static int rtw_p2p_get_op_ch(struct net_device *dev,
-- 
2.34.1

[PATCH v4 19/23] staging: r8188eu: convert rtw_p2p_get_op_ch to return void

[Abdun Nihaal]

rtw_p2p_get_op_ch always returns 0 and it's return value is not used.
Convert it to return void.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index 4c47e9bb7fc3..f533f709ead5 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -2580,12 +2580,11 @@ static void rtw_p2p_get_groupid(struct net_device *dev,
 	wrqu->data.length = strlen(extra);
 }
 
-static int rtw_p2p_get_op_ch(struct net_device *dev,
-			       struct iw_request_info *info,
-			       union iwreq_data *wrqu, char *extra)
+static void rtw_p2p_get_op_ch(struct net_device *dev,
+			      struct iw_request_info *info,
+			      union iwreq_data *wrqu, char *extra)
 
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 
@@ -2593,7 +2592,6 @@ static int rtw_p2p_get_op_ch(struct net_device *dev,
 
 	sprintf(extra, "\n\nOp_ch =%.2d\n", pwdinfo->operating_channel);
 	wrqu->data.length = strlen(extra);
-	return ret;
 }
 
 static int rtw_p2p_get_wps_configmethod(struct net_device *dev,
-- 
2.34.1

[PATCH v4 20/23] staging: r8188eu: convert rtw_p2p_invite_req to return void

[Abdun Nihaal]

rtw_p2p_invite_req always returns 0 and it's return value is not used.
Convert it to return void.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index f533f709ead5..6375b3776168 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -3037,11 +3037,10 @@ static int rtw_p2p_connect(struct net_device *dev,
 	return ret;
 }
 
-static int rtw_p2p_invite_req(struct net_device *dev,
-			      struct iw_request_info *info,
-			      union iwreq_data *wrqu, char *extra)
+static void rtw_p2p_invite_req(struct net_device *dev,
+			       struct iw_request_info *info,
+			       union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 	int jj, kk;
@@ -3065,12 +3064,12 @@ static int rtw_p2p_invite_req(struct net_device *dev,
 
 	if (wrqu->data.length <=  37) {
 		DBG_88E("[%s] Wrong format!\n", __func__);
-		return ret;
+		return;
 	}
 
 	if (rtw_p2p_chk_state(pwdinfo, P2P_STATE_NONE)) {
 		DBG_88E("[%s] WiFi Direct is disable!\n", __func__);
-		return ret;
+		return;
 	} else {
 		/*	Reset the content of struct tx_invite_req_info */
 		pinvite_req_info->benable = false;
@@ -3143,7 +3142,6 @@ static int rtw_p2p_invite_req(struct net_device *dev,
 	} else {
 		DBG_88E("[%s] NOT Found in the Scanning Queue!\n", __func__);
 	}
-	return ret;
 }
 
 static int rtw_p2p_set_persistent(struct net_device *dev,
-- 
2.34.1

[PATCH v4 21/23] staging: r8188eu: convert rtw_p2p_set_persistent to return void

[Abdun Nihaal]

rtw_p2p_set_persistent always returns 0 and it's return value is not used.
Convert it to return void.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index 6375b3776168..4c778cf92680 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -3144,11 +3144,10 @@ static void rtw_p2p_invite_req(struct net_device *dev,
 	}
 }
 
-static int rtw_p2p_set_persistent(struct net_device *dev,
-			       struct iw_request_info *info,
-			       union iwreq_data *wrqu, char *extra)
+static void rtw_p2p_set_persistent(struct net_device *dev,
+				   struct iw_request_info *info,
+				   union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 
@@ -3160,7 +3159,7 @@ static int rtw_p2p_set_persistent(struct net_device *dev,
 
 	if (rtw_p2p_chk_state(pwdinfo, P2P_STATE_NONE)) {
 		DBG_88E("[%s] WiFi Direct is disable!\n", __func__);
-		return ret;
+		return;
 	} else {
 		if (extra[0] == '0')	/*	Disable the persistent group function. */
 			pwdinfo->persistent_supported = false;
@@ -3170,7 +3169,6 @@ static int rtw_p2p_set_persistent(struct net_device *dev,
 			pwdinfo->persistent_supported = false;
 	}
 	pr_info("[%s] persistent_supported = %d\n", __func__, pwdinfo->persistent_supported);
-	return ret;
 }
 
 static int rtw_p2p_prov_disc(struct net_device *dev,
-- 
2.34.1

[PATCH v4 22/23] staging: r8188eu: convert rtw_p2p_prov_disc to return void

[Abdun Nihaal]

rtw_p2p_prov_disc always returns 0 and it's return value is not used.
Convert it to return void.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index 4c778cf92680..1af8b2c068b8 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -3171,11 +3171,10 @@ static void rtw_p2p_set_persistent(struct net_device *dev,
 	pr_info("[%s] persistent_supported = %d\n", __func__, pwdinfo->persistent_supported);
 }
 
-static int rtw_p2p_prov_disc(struct net_device *dev,
-			       struct iw_request_info *info,
-			       union iwreq_data *wrqu, char *extra)
+static void rtw_p2p_prov_disc(struct net_device *dev,
+			      struct iw_request_info *info,
+			      union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 	u8 peerMAC[ETH_ALEN] = {0x00};
@@ -3201,7 +3200,7 @@ static int rtw_p2p_prov_disc(struct net_device *dev,
 
 	if (pwdinfo->p2p_state == P2P_STATE_NONE) {
 		DBG_88E("[%s] WiFi Direct is disable!\n", __func__);
-		return ret;
+		return;
 	} else {
 		/*	Reset the content of struct tx_provdisc_req_info excluded the wps_config_method_request. */
 		memset(pwdinfo->tx_prov_disc_info.peerDevAddr, 0x00, ETH_ALEN);
@@ -3225,7 +3224,7 @@ static int rtw_p2p_prov_disc(struct net_device *dev,
 		pwdinfo->tx_prov_disc_info.wps_config_method_request = WPS_CM_LABEL;
 	} else {
 		DBG_88E("[%s] Unknown WPS config methodn", __func__);
-		return ret;
+		return;
 	}
 
 	spin_lock_bh(&pmlmepriv->scanned_queue.lock);
@@ -3297,7 +3296,6 @@ static int rtw_p2p_prov_disc(struct net_device *dev,
 	} else {
 		DBG_88E("[%s] NOT Found in the Scanning Queue!\n", __func__);
 	}
-	return ret;
 }
 
 /*	This function is used to inform the driver the user had specified the pin code value or pbc */
-- 
2.34.1

[PATCH v4 23/23] staging: r8188eu: convert rtw_p2p_got_wpsinfo to return void

[Abdun Nihaal]

rtw_p2p_got_wpsinfo always returns 0 and it's return value is not used.
Convert it to return void.

Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com>
---
 drivers/staging/r8188eu/os_dep/ioctl_linux.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
index 1af8b2c068b8..c54ec5602ddf 100644
--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -3301,11 +3301,10 @@ static void rtw_p2p_prov_disc(struct net_device *dev,
 /*	This function is used to inform the driver the user had specified the pin code value or pbc */
 /*	to application. */
 
-static int rtw_p2p_got_wpsinfo(struct net_device *dev,
-			       struct iw_request_info *info,
-			       union iwreq_data *wrqu, char *extra)
+static void rtw_p2p_got_wpsinfo(struct net_device *dev,
+				struct iw_request_info *info,
+				union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct wifidirect_info *pwdinfo = &padapter->wdinfo;
 
@@ -3326,7 +3325,6 @@ static int rtw_p2p_got_wpsinfo(struct net_device *dev,
 		pwdinfo->ui_got_wps_info = P2P_GOT_WPSINFO_PBC;
 	else
 		pwdinfo->ui_got_wps_info = P2P_NO_WPSINFO;
-	return ret;
 }
 
 static int rtw_p2p_set(struct net_device *dev,
-- 
2.34.1

Re: [PATCH v4 00/23] staging: r8188eu: remove unneeded ret variables

[Greg KH]

On Sat, Jan 29, 2022 at 09:34:06PM +0530, Abdun Nihaal wrote:
> This patchset does the following to functions in ioctl_linux.c:
> - Remove unneeded return variable in some functions.
>   These functions cannot be converted to void either because it is an
>   iw_handler function or the function does return error code.
> - Propagate error code in rtw_p2p_get2 function
> - Convert some functions that always return 0 to return void
> 
> v3 -> v4:
> - Split the changes into smaller patches to make it easier to review
> - Add a new patch to propagate error code in rtw_p2p_get2 function

Much nicer and easier to review, all now queued up, thanks!

greg k-h