summaryrefslogtreecommitdiff
path: root/drivers/net/xen-netfront.c
diff options
context:
space:
mode:
authorDavid S. Miller <davem@davemloft.net>2020-07-26 03:49:04 +0300
committerDavid S. Miller <davem@davemloft.net>2020-07-26 03:49:04 +0300
commita57066b1a01977a646145f4ce8dfb4538b08368a (patch)
tree57c2b4fa2fc48e687a1820b9bf4ef4f4363be0f9 /drivers/net/xen-netfront.c
parentdfecd3e00cd32b2a6d1cfdb30b513dd42575ada3 (diff)
parent04300d66f0a06d572d9f2ad6768c38cabde22179 (diff)
downloadlinux-a57066b1a01977a646145f4ce8dfb4538b08368a.tar.xz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
The UDP reuseport conflict was a little bit tricky. The net-next code, via bpf-next, extracted the reuseport handling into a helper so that the BPF sk lookup code could invoke it. At the same time, the logic for reuseport handling of unconnected sockets changed via commit efc6b6f6c3113e8b203b9debfb72d81e0f3dcace which changed the logic to carry on the reuseport result into the rest of the lookup loop if we do not return immediately. This requires moving the reuseport_has_conns() logic into the callers. While we are here, get rid of inline directives as they do not belong in foo.c files. The other changes were cases of more straightforward overlapping modifications. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/xen-netfront.c')
-rw-r--r--drivers/net/xen-netfront.c64
1 files changed, 42 insertions, 22 deletions
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index ed995df19247..a63e550c370e 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -66,6 +66,8 @@ module_param_named(max_queues, xennet_max_queues, uint, 0644);
MODULE_PARM_DESC(max_queues,
"Maximum number of queues per virtual interface");
+#define XENNET_TIMEOUT (5 * HZ)
+
static const struct ethtool_ops xennet_ethtool_ops;
struct netfront_cb {
@@ -1585,12 +1587,15 @@ static struct net_device *xennet_create_dev(struct xenbus_device *dev)
netif_carrier_off(netdev);
- xenbus_switch_state(dev, XenbusStateInitialising);
- wait_event(module_wq,
- xenbus_read_driver_state(dev->otherend) !=
- XenbusStateClosed &&
- xenbus_read_driver_state(dev->otherend) !=
- XenbusStateUnknown);
+ do {
+ xenbus_switch_state(dev, XenbusStateInitialising);
+ err = wait_event_timeout(module_wq,
+ xenbus_read_driver_state(dev->otherend) !=
+ XenbusStateClosed &&
+ xenbus_read_driver_state(dev->otherend) !=
+ XenbusStateUnknown, XENNET_TIMEOUT);
+ } while (!err);
+
return netdev;
exit:
@@ -2459,28 +2464,43 @@ static const struct attribute_group xennet_dev_group = {
};
#endif /* CONFIG_SYSFS */
-static int xennet_remove(struct xenbus_device *dev)
+static void xennet_bus_close(struct xenbus_device *dev)
{
- struct netfront_info *info = dev_get_drvdata(&dev->dev);
-
- dev_dbg(&dev->dev, "%s\n", dev->nodename);
+ int ret;
- if (xenbus_read_driver_state(dev->otherend) != XenbusStateClosed) {
+ if (xenbus_read_driver_state(dev->otherend) == XenbusStateClosed)
+ return;
+ do {
xenbus_switch_state(dev, XenbusStateClosing);
- wait_event(module_wq,
- xenbus_read_driver_state(dev->otherend) ==
- XenbusStateClosing ||
- xenbus_read_driver_state(dev->otherend) ==
- XenbusStateUnknown);
+ ret = wait_event_timeout(module_wq,
+ xenbus_read_driver_state(dev->otherend) ==
+ XenbusStateClosing ||
+ xenbus_read_driver_state(dev->otherend) ==
+ XenbusStateClosed ||
+ xenbus_read_driver_state(dev->otherend) ==
+ XenbusStateUnknown,
+ XENNET_TIMEOUT);
+ } while (!ret);
+
+ if (xenbus_read_driver_state(dev->otherend) == XenbusStateClosed)
+ return;
+ do {
xenbus_switch_state(dev, XenbusStateClosed);
- wait_event(module_wq,
- xenbus_read_driver_state(dev->otherend) ==
- XenbusStateClosed ||
- xenbus_read_driver_state(dev->otherend) ==
- XenbusStateUnknown);
- }
+ ret = wait_event_timeout(module_wq,
+ xenbus_read_driver_state(dev->otherend) ==
+ XenbusStateClosed ||
+ xenbus_read_driver_state(dev->otherend) ==
+ XenbusStateUnknown,
+ XENNET_TIMEOUT);
+ } while (!ret);
+}
+
+static int xennet_remove(struct xenbus_device *dev)
+{
+ struct netfront_info *info = dev_get_drvdata(&dev->dev);
+ xennet_bus_close(dev);
xennet_disconnect_backend(info);
if (info->netdev->reg_state == NETREG_REGISTERED)