[PATCH] enic: fix adaptive irq coalescing on 32-bit

[Arnd Bergmann <arnd@arndb.de>]

7c2ce6e60f703 "enic: Add support for adaptive interrupt coalescing"
introduced a 64-bit division that causes a link error on all 32-bit
machines:

drivers/built-in.o: In function `enic_poll_msix':
:(.text+0x54ff00): undefined reference to `__aeabi_uldivmod'

Since we are dividing another 32-bit value and are only interested
in the approximate range here, it should always be safe to limit
the delta to an u32 value.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
----
I haven't seen another report of this bug, just ignore this
mail if it was already fixed.

Also, there may be better ways to solve this.

diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index 0d8995c..ad2fac2 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -1217,7 +1217,7 @@ static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq)
 	 */
 
 	traffic <<= 3;
-	traffic /= delta;
+	traffic /= min_t(u32, delta, UINT_MAX);
 
 	for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++)
 		if (traffic < mod_table[index].rx_rate)