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net: hinic: fix null pointer dereference on pointer hwdev

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Pointer hwdev is being dereferenced when declaring hwif , however, later
on hwdev is being null checked, hence we have dereference before null
check error. Fix this by assigning hwif and pdef only once hwdev has
been null checked.

Detected by CoverityScan, CID#1485581 ("Dereference before null check")

Fixes: 4a61abb100 ("net-next/hinic:add rx checksum offload for HiNIC")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Colin Ian King 2018-11-22 10:05:01 +00:00 committed by David S. Miller
parent b0c4b041e3
commit e159e59287
1 changed files with 4 additions and 2 deletions
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6
drivers/net/ethernet/huawei/hinic/hinic_port.c
View file

@ -414,14 +414,16 @@ int hinic_set_rx_csum_offload(struct hinic_dev *nic_dev, u32 en)
{
struct hinic_checksum_offload rx_csum_cfg = {0};
struct hinic_hwdev *hwdev = nic_dev->hwdev;
struct hinic_hwif *hwif = hwdev->hwif;
struct pci_dev *pdev = hwif->pdev;
struct hinic_hwif *hwif;
struct pci_dev *pdev;
u16 out_size;
int err;
if (!hwdev)
return -EINVAL;
hwif = hwdev->hwif;
pdev = hwif->pdev;
rx_csum_cfg.func_id = HINIC_HWIF_FUNC_IDX(hwif);
rx_csum_cfg.rx_csum_offload = en;