-#if (65536/PAGE_SIZE + 2) < 16
+#if (65536/PAGE_SIZE + 1) < 16
 #define MAX_SKB_FRAGS 16UL
 #else
-#define MAX_SKB_FRAGS (65536/PAGE_SIZE + 2)
+#define MAX_SKB_FRAGS (65536/PAGE_SIZE + 1)
 #endif

Wouldn't it be better to only have the expression once?
Either using a MAX() define or maybe:

#define MAX_SKB_FRAGS (65536UL/PAGE_SIZE + 1)
#if MAX_SKB_FRAGS < 16UL
#undef MAX_SKB_FRAGS
#define MAX_SKB_FRAGS 16UL
#endif

Although that replicates the 16 instead :-(

	David