sgi-gru: fix bugs related to module unload of the GRU driver

Fix bugs related to module unload of the GRU driver.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/misc/sgi-gru/grukservices.c b/drivers/misc/sgi-gru/grukservices.c
index a37128431155..6b1efe447274 100644
--- a/drivers/misc/sgi-gru/grukservices.c
+++ b/drivers/misc/sgi-gru/grukservices.c
@@ -690,3 +690,22 @@ int gru_kservices_init(struct gru_state *gru)
                 quicktest(gru);
         return 0;
 }
+
+void gru_kservices_exit(struct gru_state *gru)
+{
+        struct gru_context_configuration_handle *cch;
+        struct gru_blade_state *bs;
+
+        bs = gru->gs_blade;
+        if (gru != &bs->bs_grus[1])
+                return;
+
+        cch = get_cch(gru->gs_gru_base_vaddr, KERNEL_CTXNUM);
+        lock_cch_handle(cch);
+        if (cch_interrupt_sync(cch))
+                BUG();
+        if (cch_deallocate(cch))
+                BUG();
+        unlock_cch_handle(cch);
+}
+