sunbmac: Fix compiler warning

sunbmac uses '__u32' for dma handle while invoking kernel DMA APIs,
instead of using dma_addr_t. This hasn't caused any 'incompatible
pointer type' warning on SPARC because until now dma_addr_t is of
type u32. However, recent changes in SPARC ATU (iommu) enables 64bit
DMA and therefore dma_addr_t becomes of type u64. This makes
'incompatible pointer type' warnings inevitable.

e.g.
drivers/net/ethernet/sun/sunbmac.c: In function ‘bigmac_ether_init’:
drivers/net/ethernet/sun/sunbmac.c:1166: warning: passing argument 3 of ‘dma_alloc_coherent’ from incompatible pointer type
./include/linux/dma-mapping.h:445: note: expected ‘dma_addr_t *’ but argument is of type ‘__u32 *’

This patch resolves above compiler warning.

Signed-off-by: Tushar Dave <tushar.n.dave@oracle.com>
Reviewed-by: chris hyser <chris.hyser@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/sun/sunbmac.c b/drivers/net/ethernet/sun/sunbmac.c
index aa4f9d2..02f4527 100644 (file)
--- a/drivers/net/ethernet/sun/sunbmac.c
+++ b/drivers/net/ethernet/sun/sunbmac.c
@@ -623,6 +623,7 @@ static int bigmac_init_hw(struct bigmac *bp, int from_irq)
        void __iomem *gregs        = bp->gregs;
        void __iomem *cregs        = bp->creg;
        void __iomem *bregs        = bp->bregs;
+       __u32 bblk_dvma = (__u32)bp->bblock_dvma;
        unsigned char *e = &bp->dev->dev_addr[0];
 
        /* Latch current counters into statistics. */
@@ -671,9 +672,9 @@ static int bigmac_init_hw(struct bigmac *bp, int from_irq)
                    bregs + BMAC_XIFCFG);
 
        /* Tell the QEC where the ring descriptors are. */
-       sbus_writel(bp->bblock_dvma + bib_offset(be_rxd, 0),
+       sbus_writel(bblk_dvma + bib_offset(be_rxd, 0),
                    cregs + CREG_RXDS);
-       sbus_writel(bp->bblock_dvma + bib_offset(be_txd, 0),
+       sbus_writel(bblk_dvma + bib_offset(be_txd, 0),
                    cregs + CREG_TXDS);
 
        /* Setup the FIFO pointers into QEC local memory. */

diff --git a/drivers/net/ethernet/sun/sunbmac.h b/drivers/net/ethernet/sun/sunbmac.h
index 06dd217..532fc56 100644 (file)
--- a/drivers/net/ethernet/sun/sunbmac.h
+++ b/drivers/net/ethernet/sun/sunbmac.h
@@ -291,7 +291,7 @@ struct bigmac {
        void __iomem    *bregs; /* BigMAC Registers                   */
        void __iomem    *tregs; /* BigMAC Transceiver                 */
        struct bmac_init_block  *bmac_block;    /* RX and TX descriptors */
-       __u32                    bblock_dvma;   /* RX and TX descriptors */
+       dma_addr_t              bblock_dvma;    /* RX and TX descriptors */
 
        spinlock_t              lock;