net/mlx5: Fix crash upon suspend/resume

Currently a Linux system with the mlx5 NIC always crashes upon
hibernation - suspend/resume.

Add basic callbacks so the NIC could be suspended and resumed.

Fixes: 9603b61de1ee ("mlx5: Move pci device handling from mlx5_ib to mlx5_core")
Tested-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Mark Bloch <markb@mellanox.com>
Reviewed-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c
index c1618b818f3abcd1787314ff8e12c79dc8500c95..17f818a5409038881e9344913d77be52727756ca 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -1549,6 +1549,22 @@ static void shutdown(struct pci_dev *pdev)
        mlx5_pci_disable_device(dev);
 }
 
+static int mlx5_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+       struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
+
+       mlx5_unload_one(dev, false);
+
+       return 0;
+}
+
+static int mlx5_resume(struct pci_dev *pdev)
+{
+       struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
+
+       return mlx5_load_one(dev, false);
+}
+
 static const struct pci_device_id mlx5_core_pci_table[] = {
        { PCI_VDEVICE(MELLANOX, PCI_DEVICE_ID_MELLANOX_CONNECTIB) },
        { PCI_VDEVICE(MELLANOX, 0x1012), MLX5_PCI_DEV_IS_VF},   /* Connect-IB VF */
@@ -1592,6 +1608,8 @@ static struct pci_driver mlx5_core_driver = {
        .id_table       = mlx5_core_pci_table,
        .probe          = init_one,
        .remove         = remove_one,
+       .suspend        = mlx5_suspend,
+       .resume         = mlx5_resume,
        .shutdown       = shutdown,
        .err_handler    = &mlx5_err_handler,
        .sriov_configure   = mlx5_core_sriov_configure,