From: Weihang Li liweihang@hisilicon.com
[ Upstream commit 661262bc3e0ecc9a1aed39c6b2a99766da2c22e2 ]
If we add a VF without loading hclgevf.ko and then there is a RAS error occurs, PCIe AER will call error_detected and slot_reset of all functions, and will get a NULL pointer when we check ad_dev->ops->handle_hw_ras_error. This will cause a call trace and failures on handling of follow-up RAS errors.
This patch check ae_dev and ad_dev->ops at first to solve above issues.
Signed-off-by: Weihang Li liweihang@hisilicon.com Signed-off-by: Peng Li lipeng321@huawei.com Signed-off-by: Huazhong Tan tanhuazhong@huawei.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index cd59c0cc636a..5611b990ac34 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -1916,9 +1916,9 @@ static pci_ers_result_t hns3_error_detected(struct pci_dev *pdev, if (state == pci_channel_io_perm_failure) return PCI_ERS_RESULT_DISCONNECT;
- if (!ae_dev) { + if (!ae_dev || !ae_dev->ops) { dev_err(&pdev->dev, - "Can't recover - error happened during device init\n"); + "Can't recover - error happened before device initialized\n"); return PCI_ERS_RESULT_NONE; }
@@ -1937,6 +1937,9 @@ static pci_ers_result_t hns3_slot_reset(struct pci_dev *pdev)
dev_info(dev, "requesting reset due to PCI error\n");
+ if (!ae_dev || !ae_dev->ops) + return PCI_ERS_RESULT_NONE; + /* request the reset */ if (ae_dev->ops->reset_event) { if (!ae_dev->override_pci_need_reset)