staging: remove unnecessary code

---
 drivers/staging/bcm/Misc.c                       | 10 ++--------
 drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c |  8 +-------
 drivers/staging/comedi/comedi_fops.c             |  2 +-
 drivers/staging/comedi/drivers/usbdux.c          |  5 +----
 drivers/staging/tm6000/tm6000-cards.c            |  6 +-----
 5 files changed, 6 insertions(+), 25 deletions(-)
 
diff --git a/drivers/staging/bcm/Misc.c b/drivers/staging/bcm/Misc.c
index c5003b6..c5b3a36 100644
--- a/drivers/staging/bcm/Misc.c
+++ b/drivers/staging/bcm/Misc.c
@@ -1447,16 +1447,10 @@ static void convertEndian(B_UINT8 rwFlag, PUINT puiBuffer, UINT uiByteCount)
 
 int rdm(PMINI_ADAPTER Adapter, UINT uiAddress, PCHAR pucBuff, size_t sSize)
 {
-	INT uiRetVal =0;
-
-	uiRetVal = Adapter->interface_rdm(Adapter->pvInterfaceAdapter,
+	return Adapter->interface_rdm(Adapter->pvInterfaceAdapter,
 			uiAddress, pucBuff, sSize);
-
-	if(uiRetVal < 0)
-		return uiRetVal;
-
-	return uiRetVal;
 }
+
 int wrm(PMINI_ADAPTER Adapter, UINT uiAddress, PCHAR pucBuff, size_t sSize)
 {
 	int iRetVal;
diff --git a/drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c b/drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c
index 63e2173..afafa57 100644
--- a/drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c
+++ b/drivers/staging/brcm80211/brcmfmac/wl_cfg80211.c
@@ -4164,13 +4164,7 @@ s32 wl_cfg80211_down(void)
 
 static s32 wl_dongle_probecap(struct wl_priv *wl)
 {
-	s32 err = 0;
-
-	err = wl_update_wiphybands(wl);
-	if (unlikely(err))
-		return err;
-
-	return err;
+	return wl_update_wiphybands(wl);
 }
 
 static void *wl_read_prof(struct wl_priv *wl, s32 item)
diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c
index e7e72b8..15a209f 100644
--- a/drivers/staging/comedi/comedi_fops.c
+++ b/drivers/staging/comedi/comedi_fops.c
@@ -1291,10 +1291,10 @@ static int do_lock_ioctl(struct comedi_device *dev, unsigned int arg,
 		s->lock = file;
 	spin_unlock_irqrestore(&s->spin_lock, flags);
 
+#if 0
 	if (ret < 0)
 		return ret;
 
-#if 0
 	if (s->lock_f)
 		ret = s->lock_f(dev, s);
 #endif
diff --git a/drivers/staging/comedi/drivers/usbdux.c b/drivers/staging/comedi/drivers/usbdux.c
index 1d09bfa..6637698 100644
--- a/drivers/staging/comedi/drivers/usbdux.c
+++ b/drivers/staging/comedi/drivers/usbdux.c
@@ -1935,11 +1935,8 @@ static int usbdux_pwm_cancel(struct comedi_device *dev,
 	dev_dbg(&this_usbduxsub->interface->dev,
 		"comedi %d: sending pwm off command to the usb device.\n",
 		dev->minor);
-	res = send_dux_commands(this_usbduxsub, SENDPWMOFF);
-	if (res < 0)
-		return res;
 
-	return res;
+	return send_dux_commands(this_usbduxsub, SENDPWMOFF);
 }
 
 static void usbduxsub_pwm_irq(struct urb *urb)
diff --git a/drivers/staging/tm6000/tm6000-cards.c b/drivers/staging/tm6000/tm6000-cards.c
index a69c82e..9c516cd 100644
--- a/drivers/staging/tm6000/tm6000-cards.c
+++ b/drivers/staging/tm6000/tm6000-cards.c
@@ -994,11 +994,7 @@ static int fill_board_specific_data(struct tm6000_core *dev)
 	if (rc < 0)
 		return rc;
 
-	rc = v4l2_device_register(&dev->udev->dev, &dev->v4l2_dev);
-	if (rc < 0)
-		return rc;
-
-	return rc;
+	return v4l2_device_register(&dev->udev->dev, &dev->v4l2_dev);
 }