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Something has broken MTU functionality in Xen: specifically, setting MTUs larger than 1500 fails. This prevents Jumbo Frames and other features which require larger than 1500 byte MTUs from being used. This can lead to a failure to sync/connect to other components in the cluster/cloud which expect higher MTUs and result in unavailable services. The issue is caused by the following commit to the xen-netfront driver: "xen-netfront: Fix race between device setup and open" commit f599c64fdf7d9c108e8717fb04bc41c680120da4 The following commits fix this issue in the mainline kernel: "xen-netfront: Fix mismatched rtnl_unlock" commit cb257783c2927b73614b20f915a91ff78aa6f3e8 "xen-netfront: Update features after registering netdev" commit 45c8184c1bed1ca8a7f02918552063a00b909bf5
22 lines
634 B
Diff
22 lines
634 B
Diff
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
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index d5e790dd589a..d7dc95f58dae 100644
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--- a/drivers/net/xen-netfront.c
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+++ b/drivers/net/xen-netfront.c
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@@ -1817,7 +1817,7 @@ static int talk_to_netback(struct xenbus_device *dev,
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err = xen_net_read_mac(dev, info->netdev->dev_addr);
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if (err) {
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xenbus_dev_fatal(dev, err, "parsing %s/mac", dev->nodename);
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- goto out;
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+ goto out_unlocked;
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}
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rtnl_lock();
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@@ -1932,6 +1932,7 @@ static int talk_to_netback(struct xenbus_device *dev,
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xennet_destroy_queues(info);
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out:
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rtnl_unlock();
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+out_unlocked:
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device_unregister(&dev->dev);
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return err;
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}
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