sunhme endianness annotations
This one is interesting - SBUS and PCI variants have
opposite endianness in descriptors (SBUS is sparc-only, so there
host-endian == big-endian).
Solution: declare a bitwise type (hme32) and in accessor
helpers do typechecking and force-casts (once we know that the
type is right).
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/sunhme.c b/drivers/net/sunhme.c
index 9cc13dd..25ce26a 100644
--- a/drivers/net/sunhme.c
+++ b/drivers/net/sunhme.c
@@ -194,21 +194,21 @@
static void sbus_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
{
- rxd->rx_addr = addr;
+ rxd->rx_addr = (__force hme32)addr;
wmb();
- rxd->rx_flags = flags;
+ rxd->rx_flags = (__force hme32)flags;
}
static void sbus_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
{
- txd->tx_addr = addr;
+ txd->tx_addr = (__force hme32)addr;
wmb();
- txd->tx_flags = flags;
+ txd->tx_flags = (__force hme32)flags;
}
-static u32 sbus_hme_read_desc32(u32 *p)
+static u32 sbus_hme_read_desc32(hme32 *p)
{
- return *p;
+ return (__force u32)*p;
}
static void pci_hme_write32(void __iomem *reg, u32 val)
@@ -223,21 +223,21 @@
static void pci_hme_write_rxd(struct happy_meal_rxd *rxd, u32 flags, u32 addr)
{
- rxd->rx_addr = cpu_to_le32(addr);
+ rxd->rx_addr = (__force hme32)cpu_to_le32(addr);
wmb();
- rxd->rx_flags = cpu_to_le32(flags);
+ rxd->rx_flags = (__force hme32)cpu_to_le32(flags);
}
static void pci_hme_write_txd(struct happy_meal_txd *txd, u32 flags, u32 addr)
{
- txd->tx_addr = cpu_to_le32(addr);
+ txd->tx_addr = (__force hme32)cpu_to_le32(addr);
wmb();
- txd->tx_flags = cpu_to_le32(flags);
+ txd->tx_flags = (__force hme32)cpu_to_le32(flags);
}
-static u32 pci_hme_read_desc32(u32 *p)
+static u32 pci_hme_read_desc32(hme32 *p)
{
- return cpu_to_le32p(p);
+ return le32_to_cpup((__le32 *)p);
}
#define hme_write32(__hp, __reg, __val) \
@@ -266,16 +266,16 @@
#define hme_read32(__hp, __reg) \
sbus_readl(__reg)
#define hme_write_rxd(__hp, __rxd, __flags, __addr) \
-do { (__rxd)->rx_addr = (__addr); \
+do { (__rxd)->rx_addr = (__force hme32)(u32)(__addr); \
wmb(); \
- (__rxd)->rx_flags = (__flags); \
+ (__rxd)->rx_flags = (__force hme32)(u32)(__flags); \
} while(0)
#define hme_write_txd(__hp, __txd, __flags, __addr) \
-do { (__txd)->tx_addr = (__addr); \
+do { (__txd)->tx_addr = (__force hme32)(u32)(__addr); \
wmb(); \
- (__txd)->tx_flags = (__flags); \
+ (__txd)->tx_flags = (__force hme32)(u32)(__flags); \
} while(0)
-#define hme_read_desc32(__hp, __p) (*(__p))
+#define hme_read_desc32(__hp, __p) ((__force u32)(hme32)*(__p))
#define hme_dma_map(__hp, __ptr, __size, __dir) \
sbus_map_single((__hp)->happy_dev, (__ptr), (__size), (__dir))
#define hme_dma_unmap(__hp, __addr, __size, __dir) \
@@ -291,16 +291,19 @@
#define hme_read32(__hp, __reg) \
readl(__reg)
#define hme_write_rxd(__hp, __rxd, __flags, __addr) \
-do { (__rxd)->rx_addr = cpu_to_le32(__addr); \
+do { (__rxd)->rx_addr = (__force hme32)cpu_to_le32(__addr); \
wmb(); \
- (__rxd)->rx_flags = cpu_to_le32(__flags); \
+ (__rxd)->rx_flags = (__force hme32)cpu_to_le32(__flags); \
} while(0)
#define hme_write_txd(__hp, __txd, __flags, __addr) \
-do { (__txd)->tx_addr = cpu_to_le32(__addr); \
+do { (__txd)->tx_addr = (__force hme32)cpu_to_le32(__addr); \
wmb(); \
- (__txd)->tx_flags = cpu_to_le32(__flags); \
+ (__txd)->tx_flags = (__force hme32)cpu_to_le32(__flags); \
} while(0)
-#define hme_read_desc32(__hp, __p) cpu_to_le32p(__p)
+static inline u32 hme_read_desc32(struct happy_meal *hp, hme32 *p)
+{
+ return le32_to_cpup((__le32 *)p);
+}
#define hme_dma_map(__hp, __ptr, __size, __dir) \
pci_map_single((__hp)->happy_dev, (__ptr), (__size), (__dir))
#define hme_dma_unmap(__hp, __addr, __size, __dir) \
@@ -2075,7 +2078,7 @@
}
/* This card is _fucking_ hot... */
- skb->csum = ntohs(csum ^ 0xffff);
+ skb->csum = csum_unfold(~(__force __sum16)htons(csum));
skb->ip_summed = CHECKSUM_COMPLETE;
RXD(("len=%d csum=%4x]", len, csum));