diff options
| author |   Maciej Sosnowski <maciej.sosnowski@intel.com> | 2010-11-24 17:29:46 +0000 |
|---|---|---|
| committer |   Roland Dreier <rolandd@cisco.com> | 2011-01-16 13:23:34 -0800 |
| commit | 5f61b2c6939bb6d26393df15765bc3cb260db063 (patch) | |
| tree | 0a243de60e121a3bfc06c86d7dc76ca3540fe8c4 /drivers/infiniband/hw/nes/nes.c | |
| parent | RDMA/nes: Generate IB_EVENT_PORT_ERR/PORT_ACTIVE events (diff) | |
| download | linux-dev-5f61b2c6939bb6d26393df15765bc3cb260db063.tar.xz linux-dev-5f61b2c6939bb6d26393df15765bc3cb260db063.zip | |
RDMA/nes: Fix SFP+ link down detection issue with switch port disable
In case of SFP+ PHY, link status check at interrupt processing can
give false results. For proper link status change detection a delayed
recheck is needed to give nes registers time to settle. Add a
periodic link status recheck scheduled at interrupt to detect
potential delayed registers state changes.
Addresses: http://bugs.openfabrics.org/bugzilla/show_bug.cgi?id=2117
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/nes/nes.c')
| -rw-r--r-- | drivers/infiniband/hw/nes/nes.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/nes/nes.c b/drivers/infiniband/hw/nes/nes.c index e17f52c21947..3b4ec3238ceb 100644 --- a/drivers/infiniband/hw/nes/nes.c +++ b/drivers/infiniband/hw/nes/nes.c @@ -674,6 +674,8 @@ static int __devinit nes_probe(struct pci_dev *pcidev, const struct pci_device_i } nes_notifiers_registered++; + INIT_DELAYED_WORK(&nesdev->work, nes_recheck_link_status); + /* Initialize network devices */ if ((netdev = nes_netdev_init(nesdev, mmio_regs)) == NULL) goto bail7; @@ -756,6 +758,7 @@ static void __devexit nes_remove(struct pci_dev *pcidev) struct nes_device *nesdev = pci_get_drvdata(pcidev); struct net_device *netdev; int netdev_index = 0; + unsigned long flags; if (nesdev->netdev_count) { netdev = nesdev->netdev[netdev_index]; @@ -782,6 +785,14 @@ static void __devexit nes_remove(struct pci_dev *pcidev) free_irq(pcidev->irq, nesdev); tasklet_kill(&nesdev->dpc_tasklet); + spin_lock_irqsave(&nesdev->nesadapter->phy_lock, flags); + if (nesdev->link_recheck) { + spin_unlock_irqrestore(&nesdev->nesadapter->phy_lock, flags); + cancel_delayed_work_sync(&nesdev->work); + } else { + spin_unlock_irqrestore(&nesdev->nesadapter->phy_lock, flags); + } + /* Deallocate the Adapter Structure */ nes_destroy_adapter(nesdev->nesadapter); |