staging: et131x: Remove fbr_lookup.real_physaddr

fbr_lookup.real_physaddr is only being used as a pseudonym for
fbr_lookup.ring_physaddr, so remove it and rename all instances to
ring_physaddr.
Signed-off-by: NMark Einon <mark.einon@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/et131x/et131x.c

@@ -299,7 +299,6 @@ struct fbr_lookup {
 	dma_addr_t	 ring_physaddr;
 	void		*mem_virtaddrs[MAX_DESC_PER_RING_RX / FBR_CHUNKS];
 	dma_addr_t	 mem_physaddrs[MAX_DESC_PER_RING_RX / FBR_CHUNKS];
-	u64		 real_physaddr;
 	u64		 offset;
 	u32		 local_full;
 	u32		 num_entries;
@@ -1903,9 +1902,9 @@ static void et131x_config_rx_dma_regs(struct et131x_adapter *adapter)
 	/* Set the address and parameters of Free buffer ring 1 (and 0 if
 	 * required) into the 1310's registers
 	 */
-	writel((u32) (rx_local->fbr[0]->real_physaddr >> 32),
+	writel((u32) (rx_local->fbr[0]->ring_physaddr >> 32),
 	       &rx_dma->fbr1_base_hi);
-	writel((u32) rx_local->fbr[0]->real_physaddr, &rx_dma->fbr1_base_lo);
+	writel((u32) rx_local->fbr[0]->ring_physaddr, &rx_dma->fbr1_base_lo);
 	writel(rx_local->fbr[0]->num_entries - 1, &rx_dma->fbr1_num_des);
 	writel(ET_DMA10_WRAP, &rx_dma->fbr1_full_offset);
 
@@ -1927,9 +1926,9 @@ static void et131x_config_rx_dma_regs(struct et131x_adapter *adapter)
 		fbr_entry++;
 	}
 
-	writel((u32) (rx_local->fbr[1]->real_physaddr >> 32),
+	writel((u32) (rx_local->fbr[1]->ring_physaddr >> 32),
 	       &rx_dma->fbr0_base_hi);
-	writel((u32) rx_local->fbr[1]->real_physaddr, &rx_dma->fbr0_base_lo);
+	writel((u32) rx_local->fbr[1]->ring_physaddr, &rx_dma->fbr0_base_lo);
 	writel(rx_local->fbr[1]->num_entries - 1, &rx_dma->fbr0_num_des);
 	writel(ET_DMA10_WRAP, &rx_dma->fbr0_full_offset);
 
@@ -2378,18 +2377,9 @@ static int et131x_rx_dma_memory_alloc(struct et131x_adapter *adapter)
 		return -ENOMEM;
 	}
 
-	/* Save physical address
-	 *
-	 * NOTE: dma_alloc_coherent(), used above to alloc DMA regions,
-	 * ALWAYS returns SAC (32-bit) addresses. If DAC (64-bit) addresses
-	 * are ever returned, make sure the high part is retrieved here
-	 * before storing the adjusted address.
-	 */
-	rx_ring->fbr[0]->real_physaddr = rx_ring->fbr[0]->ring_physaddr;
-
 	/* Align Free Buffer Ring 1 on a 4K boundary */
 	et131x_align_allocated_memory(adapter,
-				      &rx_ring->fbr[0]->real_physaddr,
+				      &rx_ring->fbr[0]->ring_physaddr,
 				      &rx_ring->fbr[0]->offset, 0x0FFF);
 
 	rx_ring->fbr[0]->ring_virtaddr =
@@ -2410,18 +2400,9 @@ static int et131x_rx_dma_memory_alloc(struct et131x_adapter *adapter)
 		return -ENOMEM;
 	}
 
-	/* Save physical address
-	 *
-	 * NOTE: dma_alloc_coherent(), used above to alloc DMA regions,
-	 * ALWAYS returns SAC (32-bit) addresses. If DAC (64-bit) addresses
-	 * are ever returned, make sure the high part is retrieved here before
-	 * storing the adjusted address.
-	 */
-	rx_ring->fbr[1]->real_physaddr = rx_ring->fbr[1]->ring_physaddr;
-
 	/* Align Free Buffer Ring 0 on a 4K boundary */
 	et131x_align_allocated_memory(adapter,
-				      &rx_ring->fbr[1]->real_physaddr,
+				      &rx_ring->fbr[1]->ring_physaddr,
 				      &rx_ring->fbr[1]->offset, 0x0FFF);
 
 	rx_ring->fbr[1]->ring_virtaddr =