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authorKrishna Kumar <krkumar2@in.ibm.com>2009-12-08 22:26:02 +0000
committerDavid S. Miller <davem@davemloft.net>2009-12-11 15:11:45 -0800
commite93737b0f0159a61772894943199fd3b6f315641 (patch)
treefeaa10bd2419f2a1bad89bcf4880bc8399339873 /MAINTAINERS
parentbbb84619c378414118fd4f1778125cd246c71e53 (diff)
downloadvexpress-lsk-e93737b0f0159a61772894943199fd3b6f315641.tar.gz
net: Handle NETREG_UNINITIALIZED devices correctly
Fix two problems: 1. If unregister_netdevice_many() is called with both registered and unregistered devices, rollback_registered_many() bails out when it reaches the first unregistered device. The processing of the prior registered devices is unfinished, and the remaining devices are skipped, and possible registered netdev's are leaked/unregistered. 2. System hangs or panics depending on how the devices are passed, since when netdev_run_todo() runs, some devices were not fully processed. Tested by passing intermingled unregistered and registered vlan devices to unregister_netdevice_many() as follows: 1. dev, fake_dev1, fake_dev2: hangs in run_todo ("unregister_netdevice: waiting for eth1.100 to become free. Usage count = 1") 2. fake_dev1, dev, fake_dev2: failure during de-registration and next registration, followed by a vlan driver Oops during subsequent registration. Confirmed that the patch fixes both cases. Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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