for (i = 0; i < 2048; i++) { ... req->l2t_idx = htonl(V_L2T_W_IDX(i)); ... in there is very odd; l2t_idx is a 16bit field, and #define V_L2T_W_IDX(x) ((x) << S_L2T_W_IDX) #define S_L2T_W_IDX 0
IOW, we are taking htonl(something in range 0..2047) and shove it into 16bit field. Which would, on a little-endian host, be a fancy way of spelling req->l2t_idx = 0; What's the intended behaviour there? I'm not familiar with the hardware in question; this smells like a typoed req->l2t_idx = htons(...) but how does the current code manage to work (i.e. does anything even care about the value stored there)? It's not a big-endian-only driver, after all...