wpi_tx_cmd
size = WPI_TX_RING_COUNT * sizeof (struct wpi_tx_cmd);
paddr += sizeof (struct wpi_tx_cmd);
struct wpi_tx_cmd *cmd;
struct wpi_tx_cmd *cmd;
struct wpi_tx_cmd *cmd;
cmd = mtod(m, struct wpi_tx_cmd *);
struct wpi_tx_cmd *cmd;