The existing method of telling if a channel is sub-channel in
vmbus_process_offer() is cumbersome. This new simple helper function
is preferred in future.
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
} pipe;
} u;
/*
- * The sub_channel_index is defined in win8.
+ * The sub_channel_index is defined in Win8: a value of zero means a
+ * primary channel and a value of non-zero means a sub-channel.
+ *
+ * Before Win8, the field is reserved, meaning it's always zero.
*/
u16 sub_channel_index;
u16 reserved3;
VMBUS_CHANNEL_TLNPI_PROVIDER_OFFER);
}
+static inline bool is_sub_channel(const struct vmbus_channel *c)
+{
+ return c->offermsg.offer.sub_channel_index != 0;
+}
+
static inline void set_channel_affinity_state(struct vmbus_channel *c,
enum hv_numa_policy policy)
{