Commit bdbeefe8 authored Mar 02, 2013 by Don Skidmore Committed by Jeff Kirsher Apr 24, 2013

ixgbe: fix possible divide by zero in ixgbe_update_itr

Protect the code by bailing out of ixgbe_update_itr() when this occurs.
The next call to ixgbe_update_itr will continue to dynamically update ITR.

Signed-of-by: Don Skidmore <donald.c.skidmore@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

parent 01f27fc0

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -2095,6 +2095,9 @@ static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
		*/
		/* what was last interrupt timeslice? */
		timepassed_us = q_vector->itr >> 2;
		if (timepassed_us == 0)
		return;

		bytes_perint = bytes / timepassed_us; /* bytes/usec */

		switch (itr_setting) {