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Subject[PATCH 4.14 024/165] hv_netvsc: cancel subchannel setup before halting device
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Stephen Hemminger <stephen@networkplumber.org>

[ Commit a7483ec0267c69b34e818738da60b392623da94b upstream. ]

Block setup of multiple channels earlier in the teardown
process. This avoids possible races between halt and subchannel
initialization.

Suggested-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/hyperv/rndis_filter.c | 3 +++
1 file changed, 3 insertions(+)

--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -1340,6 +1340,9 @@ void rndis_filter_device_remove(struct h
{
struct rndis_device *rndis_dev = net_dev->extension;

+ /* Don't try and setup sub channels if about to halt */
+ cancel_work_sync(&net_dev->subchan_work);
+
/* Halt and release the rndis device */
rndis_filter_halt_device(rndis_dev);


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