sfc: fix build warnings on 32-bit

Truncation of DMA_BIT_MASK to 32-bit dma_addr_t is semantically safe,
 but the compiler was warning because it was happening implicitly.
Insert explicit casts to suppress the warnings.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Edward Cree <ecree@solarflare.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/sfc/ef100.c b/drivers/net/ethernet/sfc/ef100.c
index 9729983..c54b7f8 100644 (file)
--- a/drivers/net/ethernet/sfc/ef100.c
+++ b/drivers/net/ethernet/sfc/ef100.c
@@ -142,7 +142,7 @@ static int ef100_pci_parse_continue_entry(struct efx_nic *efx, int entry_locatio
 
                /* Temporarily map new BAR. */
                rc = efx_init_io(efx, bar,
-                                DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
+                                (dma_addr_t)DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
                                 pci_resource_len(efx->pci_dev, bar));
                if (rc) {
                        netif_err(efx, probe, efx->net_dev,
@@ -160,7 +160,7 @@ static int ef100_pci_parse_continue_entry(struct efx_nic *efx, int entry_locatio
 
                /* Put old BAR back. */
                rc = efx_init_io(efx, previous_bar,
-                                DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
+                                (dma_addr_t)DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
                                 pci_resource_len(efx->pci_dev, previous_bar));
                if (rc) {
                        netif_err(efx, probe, efx->net_dev,
@@ -334,7 +334,7 @@ static int ef100_pci_parse_xilinx_cap(struct efx_nic *efx, int vndr_cap,
 
        /* Temporarily map BAR. */
        rc = efx_init_io(efx, bar,
-                        DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
+                        (dma_addr_t)DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
                         pci_resource_len(efx->pci_dev, bar));
        if (rc) {
                netif_err(efx, probe, efx->net_dev,
@@ -495,7 +495,7 @@ static int ef100_pci_probe(struct pci_dev *pci_dev,
 
        /* Set up basic I/O (BAR mappings etc) */
        rc = efx_init_io(efx, fcw.bar,
-                        DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
+                        (dma_addr_t)DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
                         pci_resource_len(efx->pci_dev, fcw.bar));
        if (rc)
                goto fail;