@@ -332,7 +332,7 @@
#define DESC_BUFFER2_SZ_OFFSET 16
struct xgmac_dma_desc {
- __le32 flags;
+ volatile __le32 flags;
__le32 buf_size;
__le32 buf1_addr; /* Buffer 1 Address Pointer */
__le32 buf2_addr; /* Buffer 2 Address Pointer */
@@ -451,15 +451,20 @@ static inline int desc_get_owner(struct xgmac_dma_desc *p)
static inline void desc_set_rx_owner(struct xgmac_dma_desc *p)
{
/* Clear all fields and set the owner */
+ wmb();
p->flags = cpu_to_le32(DESC_OWN);
+ wmb();
}
static inline void desc_set_tx_owner(struct xgmac_dma_desc *p, u32 flags)
{
- u32 tmpflags = le32_to_cpu(p->flags);
+ u32 tmpflags;
+ wmb();
+ tmpflags = le32_to_cpu(p->flags);
tmpflags &= TXDESC_END_RING;
tmpflags |= flags | DESC_OWN;
p->flags = cpu_to_le32(tmpflags);
+ wmb();
}
static inline int desc_get_tx_ls(struct xgmac_dma_desc *p)