intel: legacy: field prep conversion

Refactor several older Intel drivers to use FIELD_PREP(), which reduces
lines of code and adds clarity of intent.

This code was generated by the following coccinelle/spatch script and
then manually repaired.

@prep2@
constant shift,mask;
type T;
expression a;
@@
-(((T)(a) << shift) & mask)
+FIELD_PREP(mask, a)

@prep@
constant shift,mask;
type T;
expression a;
@@
-((T)((a) << shift) & mask)
+FIELD_PREP(mask, a)

Cc: Julia Lawall <Julia.Lawall@inria.fr>
Reviewed-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

3 files changed, 6 insertions, 10 deletions

diff --git a/drivers/net/ethernet/intel/igb/e1000_phy.c b/drivers/net/ethernet/intel/igb/e1000_phy.c
index 3c1b562a3271..c84e7356cdb1 100644
--- a/drivers/net/ethernet/intel/igb/e1000_phy.c
+++ b/drivers/net/ethernet/intel/igb/e1000_phy.c
@@ -255,7 +255,7 @@ s32 igb_read_phy_reg_i2c(struct e1000_hw *hw, u32 offset, u16 *data)
 	}
 
 	/* Need to byte-swap the 16-bit value. */
-	*data = ((i2ccmd >> 8) & 0x00FF) | ((i2ccmd << 8) & 0xFF00);
+	*data = ((i2ccmd >> 8) & 0x00FF) | FIELD_PREP(0xFF00, i2ccmd);
 
 	return 0;
 }
@@ -282,7 +282,7 @@ s32 igb_write_phy_reg_i2c(struct e1000_hw *hw, u32 offset, u16 data)
 	}
 
 	/* Swap the data bytes for the I2C interface */
-	phy_data_swapped = ((data >> 8) & 0x00FF) | ((data << 8) & 0xFF00);
+	phy_data_swapped = ((data >> 8) & 0x00FF) | FIELD_PREP(0xFF00, data);
 
 	/* Set up Op-code, Phy Address, and register address in the I2CCMD
 	 * register.  The MAC will take care of interfacing with the
diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c
index d868a70732f4..9d79ea3cd528 100644
--- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
+++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
@@ -2711,8 +2711,7 @@ static int igb_rxnfc_write_etype_filter(struct igb_adapter *adapter,
 	etqf |= (etype & E1000_ETQF_ETYPE_MASK);
 
 	etqf &= ~E1000_ETQF_QUEUE_MASK;
-	etqf |= ((input->action << E1000_ETQF_QUEUE_SHIFT)
-		& E1000_ETQF_QUEUE_MASK);
+	etqf |= FIELD_PREP(E1000_ETQF_QUEUE_MASK, input->action);
 	etqf |= E1000_ETQF_QUEUE_ENABLE;
 
 	wr32(E1000_ETQF(i), etqf);
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index b2295caa2f0a..897eb36bb609 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -9810,8 +9810,7 @@ static void igb_set_vf_rate_limit(struct e1000_hw *hw, int vf, int tx_rate,
 			 tx_rate;
 
 		bcnrc_val = E1000_RTTBCNRC_RS_ENA;
-		bcnrc_val |= ((rf_int << E1000_RTTBCNRC_RF_INT_SHIFT) &
-			      E1000_RTTBCNRC_RF_INT_MASK);
+		bcnrc_val |= FIELD_PREP(E1000_RTTBCNRC_RF_INT_MASK, rf_int);
 		bcnrc_val |= (rf_dec & E1000_RTTBCNRC_RF_DEC_MASK);
 	} else {
 		bcnrc_val = 0;
@@ -10000,8 +9999,7 @@ static void igb_init_dmac(struct igb_adapter *adapter, u32 pba)
 			hwm = 64 * (pba - 6);
 			reg = rd32(E1000_FCRTC);
 			reg &= ~E1000_FCRTC_RTH_COAL_MASK;
-			reg |= ((hwm << E1000_FCRTC_RTH_COAL_SHIFT)
-				& E1000_FCRTC_RTH_COAL_MASK);
+			reg |= FIELD_PREP(E1000_FCRTC_RTH_COAL_MASK, hwm);
 			wr32(E1000_FCRTC, reg);
 
 			/* Set the DMA Coalescing Rx threshold to PBA - 2 * max
@@ -10010,8 +10008,7 @@ static void igb_init_dmac(struct igb_adapter *adapter, u32 pba)
 			dmac_thr = pba - 10;
 			reg = rd32(E1000_DMACR);
 			reg &= ~E1000_DMACR_DMACTHR_MASK;
-			reg |= ((dmac_thr << E1000_DMACR_DMACTHR_SHIFT)
-				& E1000_DMACR_DMACTHR_MASK);
+			reg |= FIELD_PREP(E1000_DMACR_DMACTHR_MASK, dmac_thr);
 
 			/* transition to L0x or L1 if available..*/
 			reg |= (E1000_DMACR_DMAC_EN | E1000_DMACR_DMAC_LX_MASK);