[PATCH v3 28/31] net/i40e/base: fix division by zero
From: Jingjing Wu <hidden>
Date: 2016-12-10 11:24:50
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 <redacted>
CC: stable@dpdk.org
---
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