From 6f3d791f300618caf82a2be0c27456edd76d5164 Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Fri, 11 Aug 2017 10:03:59 -0700 Subject: Drivers: hv: vmbus: Fix rescind handling issues This patch handles the following issues that were observed when we are handling racing channel offer message and rescind message for the same offer: 1. Since the host does not respond to messages on a rescinded channel, in the current code, we could be indefinitely blocked on the vmbus_open() call. 2. When a rescinded channel is being closed, if there is a pending interrupt on the channel, we could end up freeing the channel that the interrupt handler would run on. Signed-off-by: K. Y. Srinivasan Reviewed-by: Dexuan Cui Tested-by: Dexuan Cui Signed-off-by: Greg Kroah-Hartman --- drivers/hv/vmbus_drv.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/hv/vmbus_drv.c') diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index ed84e96715a0..43160a2eafe0 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -940,6 +940,9 @@ static void vmbus_chan_sched(struct hv_per_cpu_context *hv_cpu) if (channel->offermsg.child_relid != relid) continue; + if (channel->rescind) + continue; + switch (channel->callback_mode) { case HV_CALL_ISR: vmbus_channel_isr(channel); -- cgit v1.2.3