[PATCH] net/ixgbe: fix null dereference on EEPROM write for E610

[Sandeep Penigalapati]

E610 does not support EEPROM writes and leaves eeprom.ops.write_buffer
as NULL. ixgbe_set_eeprom() calls this pointer without checking it,
causing a NULL pointer dereference when a set-eeprom request is issued
on an E610 port.

Check the op for NULL and return -ENOTSUP instead.

Fixes: 316637762a5f ("net/ixgbe/base: enable E610 device")
Cc: stable at dpdk.org

Signed-off-by: Sandeep Penigalapati <sandeep.penigalapati at intel.com>
---
 drivers/net/intel/ixgbe/ixgbe_ethdev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/intel/ixgbe/ixgbe_ethdev.c b/drivers/net/intel/ixgbe/ixgbe_ethdev.c
index 78e19f94c0..c653951858 100644
--- a/drivers/net/intel/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/intel/ixgbe/ixgbe_ethdev.c
@@ -7370,6 +7370,9 @@ ixgbe_set_eeprom(struct rte_eth_dev *dev,
 
 	in_eeprom->magic = hw->vendor_id | (hw->device_id << 16);
 
+	if (eeprom->ops.write_buffer == NULL)
+		return -ENOTSUP;
+
 	return eeprom->ops.write_buffer(hw,  first, length, data);
 }
 
-- 
2.27.0