net/i40e/base: fix 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.

Fixes: 8db9e2a1b232 ("i40e: base driver")

Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>

diff --git a/drivers/net/i40e/base/i40e_common.c b/drivers/net/i40e/base/i40e_common.c
index 14aaac6..fdf9d9b 100644 (file)
--- a/drivers/net/i40e/base/i40e_common.c
+++ b/drivers/net/i40e/base/i40e_common.c
@@ -3967,8 +3967,10 @@ 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