Re: [PATCH 2/2] Drivers: hv: vmbus: Log on missing offers

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On 10/21/2024 9:56 AM, Saurabh Singh Sengar wrote:
On Fri, Oct 18, 2024 at 04:58:11AM -0700, Naman Jain wrote:
From: John Starks <jostarks@xxxxxxxxxxxxx>

When resuming from hibernation, log any channels that were present
before hibernation but now are gone.

Signed-off-by: John Starks <jostarks@xxxxxxxxxxxxx>
Co-developed-by: Naman Jain <namjain@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Naman Jain <namjain@xxxxxxxxxxxxxxxxxxx>
---
  drivers/hv/vmbus_drv.c | 16 ++++++++++++++++
  1 file changed, 16 insertions(+)

diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index bd3fc41dc06b..1f56d138210e 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -2462,6 +2462,7 @@ static int vmbus_bus_suspend(struct device *dev)
static int vmbus_bus_resume(struct device *dev)
  {
+	struct vmbus_channel *channel;
  	struct vmbus_channel_msginfo *msginfo;
  	size_t msgsize;
  	int ret;
@@ -2494,6 +2495,21 @@ static int vmbus_bus_resume(struct device *dev)
vmbus_request_offers(); + mutex_lock(&vmbus_connection.channel_mutex);
+	list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) {
+		if (channel->offermsg.child_relid != INVALID_RELID)
+			continue;
+
+		/* hvsock channels are not expected to be present. */
+		if (is_hvsock_channel(channel))
+			continue;
+
+		pr_err("channel %pUl/%pUl not present after resume.\n",
+			&channel->offermsg.offer.if_type,
+			&channel->offermsg.offer.if_instance);

Do we want to put a TODO here, so as to do cleanup of these channels
like force rescind etc later ?

- Saurabh


Sure, we can put that.

Regards,
Naman




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