On Mon, Jun 29, 2020 at 06:19:46PM +0000, Andres Beltran wrote:
[...]

quoted

quoted

 EXPORT_SYMBOL_GPL(vmbus_recvpacket_raw);
+
+/*
+ * vmbus_next_request_id - Returns a new request id. It is also
+ * the index at which the guest memory address is stored.
+ * Uses a spin lock to avoid race conditions.
+ * @rqstor: Pointer to the requestor struct
+ * @rqst_add: Guest memory address to be stored in the array
+ */
+u64 vmbus_next_request_id(struct vmbus_requestor *rqstor, u64 rqst_addr)
+{
+	unsigned long flags;
+	u64 current_id;
+
+	spin_lock_irqsave(&rqstor->req_lock, flags);

Do you really need the irqsave variant here? I.e. is there really a
chance this code is reachable from an interrupt handler?

Other VMBus drivers will also need to use this functionality, and
some of them will be called with interrupts disabled. So, I think
we should keep the irqsave variant here.

Okay. This makes sense.

Wei.