diff mbox

[net-next] hv_netvsc: Fix the list processing for network change event

Message ID 1461280381-17530-1-git-send-email-haiyangz@microsoft.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Haiyang Zhang April 21, 2016, 11:13 p.m. UTC 
RNDIS_STATUS_NETWORK_CHANGE event is handled as two "half events" --
media disconnect & connect. The second half should be added to the list
head, not to the tail. So all events are processed in normal order.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
---
 drivers/net/hyperv/netvsc_drv.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

Comments

Vitaly Kuznetsov April 22, 2016, 8:49 a.m. UTC | #1 
Haiyang Zhang <haiyangz@microsoft.com> writes:

> RNDIS_STATUS_NETWORK_CHANGE event is handled as two "half events" --
> media disconnect & connect. The second half should be added to the list
> head, not to the tail. So all events are processed in normal order.
>

Thanks,

this matters when we get some other events in between these two halves.

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>

> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
> ---
>  drivers/net/hyperv/netvsc_drv.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
> index bfdb568a..ba3f3f3 100644
> --- a/drivers/net/hyperv/netvsc_drv.c
> +++ b/drivers/net/hyperv/netvsc_drv.c
> @@ -1125,7 +1125,7 @@ static void netvsc_link_change(struct work_struct *w)
>  			netif_tx_stop_all_queues(net);
>  			event->event = RNDIS_STATUS_MEDIA_CONNECT;
>  			spin_lock_irqsave(&ndev_ctx->lock, flags);
> -			list_add_tail(&event->list, &ndev_ctx->reconfig_events);
> +			list_add(&event->list, &ndev_ctx->reconfig_events);
>  			spin_unlock_irqrestore(&ndev_ctx->lock, flags);
>  			reschedule = true;
>  		}
David Miller April 25, 2016, 3:28 a.m. UTC | #2 
From: Haiyang Zhang <haiyangz@microsoft.com>
Date: Thu, 21 Apr 2016 16:13:01 -0700

> RNDIS_STATUS_NETWORK_CHANGE event is handled as two "half events" --
> media disconnect & connect. The second half should be added to the list
> head, not to the tail. So all events are processed in normal order.
> 
> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>

Applied, thanks.
diff mbox

Patch

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index bfdb568a..ba3f3f3 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -1125,7 +1125,7 @@  static void netvsc_link_change(struct work_struct *w)
 			netif_tx_stop_all_queues(net);
 			event->event = RNDIS_STATUS_MEDIA_CONNECT;
 			spin_lock_irqsave(&ndev_ctx->lock, flags);
-			list_add_tail(&event->list, &ndev_ctx->reconfig_events);
+			list_add(&event->list, &ndev_ctx->reconfig_events);
 			spin_unlock_irqrestore(&ndev_ctx->lock, flags);
 			reschedule = true;
 		}