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authorstephen hemminger <stephen@networkplumber.org>2017-08-04 03:13:54 +0300
committerDavid S. Miller <davem@davemloft.net>2017-08-07 07:23:21 +0300
commit732e49850c5e15231e11a0a464748bcbade5e3c2 (patch)
tree5d000b7307ee1935be7492297897bf4bbb30c6ca /tools
parent2c460621bb2e6baf8a475c407cdb29029b2497ac (diff)
downloadlinux-732e49850c5e15231e11a0a464748bcbade5e3c2.tar.xz
netvsc: fix race on sub channel creation
The existing sub channel code did not wait for all the sub-channels to completely initialize. This could lead to race causing crash in napi_netif_del() from bad list. The existing code would send an init message, then wait only for the initial response that the init message was received. It thought it was waiting for sub channels but really the init response did the wakeup. The new code keeps track of the number of open channels and waits until that many are open. Other issues here were: * host might return less sub-channels than was requested. * the new init status is not valid until after init was completed. Fixes: b3e6b82a0099 ("hv_netvsc: Wait for sub-channels to be processed during probe") Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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