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i40e: Fix for division by zero 

For some cases when reading from device are incorrect or image is
incorrect, this part of code causes crash due to division by zero.

Change-ID: I8961029a7a87b0a479995823ef8fcbf6471405e1
Signed-off-by: Michal Kosiarz <michal.kosiarz@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Michal Kosiarz 2016-10-11 15:26:56 -07:00 committed by Jeff Kirsher
parent 13fd3f9cc3
commit 999b315d39
1 changed files with 4 additions and 2 deletions
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6
drivers/net/ethernet/intel/i40e/i40e_common.c
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@ -3313,8 +3313,10 @@ static void i40e_parse_discover_capabilities(struct i40e_hw *hw, void *buff,
/* partition id is 1-based, and functions are evenly spread
* across the ports as partitions
*/
hw->partition_id = (hw->pf_id / hw->num_ports) + 1;
hw->num_partitions = num_functions / hw->num_ports;
if (hw->num_ports != 0) {
hw->partition_id = (hw->pf_id / hw->num_ports) + 1;
hw->num_partitions = num_functions / hw->num_ports;
}
/* additional HW specific goodies that might
* someday be HW version specific