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forked fromtorvalds/linux

Commit8348e04

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shemmingerdavem330
authored andcommitted
hv_netvsc: disable NAPI before channel close
This makes sure that no CPU is still process packets whenthe channel is closed.Fixes:76bb5db ("netvsc: fix use after free on module removal")Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>Signed-off-by: David S. Miller <davem@davemloft.net>
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‎drivers/net/hyperv/netvsc.c‎

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -568,6 +568,10 @@ void netvsc_device_remove(struct hv_device *device)
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RCU_INIT_POINTER(net_device_ctx->nvdev,NULL);
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/* And disassociate NAPI context from device */
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for (i=0;i<net_device->num_chn;i++)
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netif_napi_del(&net_device->chan_table[i].napi);
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/*
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* At this point, no one should be accessing net_device
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* except in here
@@ -579,10 +583,6 @@ void netvsc_device_remove(struct hv_device *device)
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netvsc_teardown_gpadl(device,net_device);
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/* And dissassociate NAPI context from device */
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for (i=0;i<net_device->num_chn;i++)
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netif_napi_del(&net_device->chan_table[i].napi);
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/* Release all resources */
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free_netvsc_device_rcu(net_device);
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}

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