vmxnet3: Disable napi in suspend, reenable in resume.

There is a small possibility of a race where the suspend routine gets
called, while a napi callback is still pending and when that comes up,
it enables interrupts which just got disabled in the suspend routine.
This change adds napi disable call in suspend and enable in resume to
avoid race.

Signed-off-by: Shreyas N Bhatewara <sbhatewara@vmware.com>
Acked-by: Dmitry Torokhov <dtor@vmware.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
index a1632a995380b91438e8e7025776227ae82e39f0..20ef4f36ea2e25f61c71a75e919e76797a059ef8 100644 (file)
--- a/drivers/net/vmxnet3/vmxnet3_drv.c
+++ b/drivers/net/vmxnet3/vmxnet3_drv.c
@@ -3101,6 +3101,9 @@ vmxnet3_suspend(struct device *device)
        if (!netif_running(netdev))
                return 0;
 
+       for (i = 0; i < adapter->num_rx_queues; i++)
+               napi_disable(&adapter->rx_queue[i].napi);
+
        vmxnet3_disable_all_intrs(adapter);
        vmxnet3_free_irqs(adapter);
        vmxnet3_free_intr_resources(adapter);
@@ -3192,7 +3195,7 @@ skip_arp:
 static int
 vmxnet3_resume(struct device *device)
 {
-       int err;
+       int err, i = 0;
        struct pci_dev *pdev = to_pci_dev(device);
        struct net_device *netdev = pci_get_drvdata(pdev);
        struct vmxnet3_adapter *adapter = netdev_priv(netdev);
@@ -3224,6 +3227,8 @@ vmxnet3_resume(struct device *device)
                               VMXNET3_CMD_UPDATE_PMCFG);
        vmxnet3_alloc_intr_resources(adapter);
        vmxnet3_request_irqs(adapter);
+       for (i = 0; i < adapter->num_rx_queues; i++)
+               napi_enable(&adapter->rx_queue[i].napi);
        vmxnet3_enable_all_intrs(adapter);
 
        return 0;