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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>
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@ -2095,6 +2095,9 @@ static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
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*/
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/* what was last interrupt timeslice? */
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timepassed_us = q_vector->itr >> 2;
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if (timepassed_us == 0)
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return;
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bytes_perint = bytes / timepassed_us; /* bytes/usec */
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switch (itr_setting) {
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