IB/hfi1: Add shared ASIC structure
Create a shared structure to exist between devices that share the
same ASIC.
Reviewed-by: Mitko Haralanov <mitko.haralanov@intel.com>
Reviewed-by: Easwar Hariharan <easwar.hariharan@intel.com>
Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Jubin John <jubin.john@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/staging/rdma/hfi1/init.c b/drivers/staging/rdma/hfi1/init.c
index 37b3ce8..260a8e1 100644
--- a/drivers/staging/rdma/hfi1/init.c
+++ b/drivers/staging/rdma/hfi1/init.c
@@ -974,6 +974,25 @@
kfree(rcd);
}
+/*
+ * Release our hold on the shared asic data. If we are the last one,
+ * free the structure. Must be holding hfi1_devs_lock.
+ */
+static void release_asic_data(struct hfi1_devdata *dd)
+{
+ int other;
+
+ if (!dd->asic_data)
+ return;
+ dd->asic_data->dds[dd->hfi1_id] = NULL;
+ other = dd->hfi1_id ? 0 : 1;
+ if (!dd->asic_data->dds[other]) {
+ /* we are the last holder, free it */
+ kfree(dd->asic_data);
+ }
+ dd->asic_data = NULL;
+}
+
void hfi1_free_devdata(struct hfi1_devdata *dd)
{
unsigned long flags;
@@ -981,6 +1000,7 @@
spin_lock_irqsave(&hfi1_devs_lock, flags);
idr_remove(&hfi1_unit_table, dd->unit);
list_del(&dd->list);
+ release_asic_data(dd);
spin_unlock_irqrestore(&hfi1_devs_lock, flags);
free_platform_config(dd);
rcu_barrier(); /* wait for rcu callbacks to complete */