[dpdk-dev] [PATCH v2 28/31] net/i40e/base: avoid division by zero

Jingjing Wu jingjing.wu at intel.com
Fri Dec 9 15:39:21 CET 2016


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

Signed-off-by: Jingjing Wu <jingjing.wu at intel.com>
---
 drivers/net/i40e/base/i40e_common.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/i40e/base/i40e_common.c b/drivers/net/i40e/base/i40e_common.c
index 14aaac6..fdf9d9b 100644
--- 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
-- 
2.4.11



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