staging: rtl8712: merge lines and remove unused variable for immediate return

This patch merge two lines in a single line if immediate return is found.
Unused variables in each case were removed manually as they are no longer
needed.

This is done using Coccinelle. Semantic patch used for this is as
follows :
@@
expression ret;
identifier f;
@@

-ret =
+return
     f(...);
-return ret;
Signed-off-by: Tapasweni Pathak <tapaswenipathak@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/rtl8712_io.c

@@ -39,11 +39,9 @@ u8 r8712_read8(struct _adapter *adapter, u32 addr)
 	struct io_queue *pio_queue = (struct io_queue *)adapter->pio_queue;
 	struct intf_hdl *pintfhdl = &(pio_queue->intf);
 	u8 (*_read8)(struct intf_hdl *pintfhdl, u32 addr);
-	u8 r_val;
 
 	_read8 = pintfhdl->io_ops._read8;
-	r_val = _read8(pintfhdl, addr);
-	return r_val;
+	return  _read8(pintfhdl, addr);
 }
 
 u16 r8712_read16(struct _adapter *adapter, u32 addr)
@@ -51,11 +49,9 @@ u16 r8712_read16(struct _adapter *adapter, u32 addr)
 	struct io_queue *pio_queue = (struct io_queue *)adapter->pio_queue;
 	struct intf_hdl *pintfhdl = &(pio_queue->intf);
 	u16 (*_read16)(struct intf_hdl *pintfhdl, u32 addr);
-	u16 r_val;
 
 	_read16 = pintfhdl->io_ops._read16;
-	r_val = _read16(pintfhdl, addr);
-	return r_val;
+	return _read16(pintfhdl, addr);
 }
 
 u32 r8712_read32(struct _adapter *adapter, u32 addr)
@@ -63,11 +59,9 @@ u32 r8712_read32(struct _adapter *adapter, u32 addr)
 	struct io_queue *pio_queue = (struct io_queue *)adapter->pio_queue;
 	struct intf_hdl *pintfhdl = &(pio_queue->intf);
 	u32 (*_read32)(struct intf_hdl *pintfhdl, u32 addr);
-	u32 r_val;
 
 	_read32 = pintfhdl->io_ops._read32;
-	r_val = _read32(pintfhdl, addr);
-	return r_val;
+	return _read32(pintfhdl, addr);
 }
 
 void r8712_write8(struct _adapter *adapter, u32 addr, u8 val)

drivers/staging/rtl8712/rtl871x_mp.c

@@ -186,14 +186,12 @@ u8 r8712_bb_reg_write(struct _adapter *pAdapter, u16 offset, u32 value)
 u32 r8712_rf_reg_read(struct _adapter *pAdapter, u8 path, u8 offset)
 {
 	u16 rf_addr = (path << 8) | offset;
-	u32 rf_data;
 	struct IOCMD_STRUCT iocmd;
 
 	iocmd.cmdclass	= IOCMD_CLASS_BB_RF;
 	iocmd.value	= rf_addr;
 	iocmd.index	= IOCMD_RF_READ_IDX;
-	rf_data = fw_iocmd_read(pAdapter, iocmd);
-	return rf_data;
+	return fw_iocmd_read(pAdapter, iocmd);
 }
 
 u8 r8712_rf_reg_write(struct _adapter *pAdapter, u8 path, u8 offset, u32 value)
@@ -504,11 +502,8 @@ static void TriggerRFThermalMeter(struct _adapter *pAdapter)
 
 static u32 ReadRFThermalMeter(struct _adapter *pAdapter)
 {
-	u32 ThermalValue = 0;
-
 	/* 0x24: RF Reg[4:0] */
-	ThermalValue = get_rf_reg(pAdapter, RF_PATH_A, RF_T_METER, 0x1F);
-	return ThermalValue;
+	return get_rf_reg(pAdapter, RF_PATH_A, RF_T_METER, 0x1F);
 }
 
 void r8712_GetThermalMeter(struct _adapter *pAdapter, u32 *value)