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netvsc: Deal with rescinded channels correctly
[ Upstream commit 73e64fa4f4
]
We will not be able to send packets over a channel that has been
rescinded. Make necessary adjustments so we can properly cleanup
even when the channel is rescinded. This issue can be trigerred
in the NIC hot-remove path.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 16 additions and 0 deletions
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@ -151,6 +151,13 @@ static void netvsc_destroy_buf(struct hv_device *device)
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sizeof(struct nvsp_message),
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(unsigned long)revoke_packet,
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VM_PKT_DATA_INBAND, 0);
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/* If the failure is because the channel is rescinded;
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* ignore the failure since we cannot send on a rescinded
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* channel. This would allow us to properly cleanup
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* even when the channel is rescinded.
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*/
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if (device->channel->rescind)
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ret = 0;
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/*
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* If we failed here, we might as well return and
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* have a leak rather than continue and a bugchk
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@ -211,6 +218,15 @@ static void netvsc_destroy_buf(struct hv_device *device)
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sizeof(struct nvsp_message),
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(unsigned long)revoke_packet,
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VM_PKT_DATA_INBAND, 0);
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/* If the failure is because the channel is rescinded;
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* ignore the failure since we cannot send on a rescinded
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* channel. This would allow us to properly cleanup
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* even when the channel is rescinded.
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*/
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if (device->channel->rescind)
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ret = 0;
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/* If we failed here, we might as well return and
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* have a leak rather than continue and a bugchk
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*/
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