gpu: nvgpu: fix return code in *_ltc_cbc_ctrl()

Fix the return code for both gk20a_ and gm20b_ltc_cbc_ctrl()
functions. Before a positive return woudl always happen. Now,
if there's a timeout -EBUSY is returned.

Change-Id: Id76dc44af1376fceebf5043afb057c153cb0752e
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/729165
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gm20b/ltc_gm20b.c b/drivers/gpu/nvgpu/gm20b/ltc_gm20b.c
index 03307c01..9d16dba7 100644
--- a/drivers/gpu/nvgpu/gm20b/ltc_gm20b.c
+++ b/drivers/gpu/nvgpu/gm20b/ltc_gm20b.c
@@ -165,7 +165,7 @@ int gm20b_ltc_cbc_ctrl(struct gk20a *g, enum gk20a_cbc_op op,
 out:
         trace_gk20a_ltc_cbc_ctrl_done(g->dev->name);
         mutex_unlock(&g->mm.l2_op_lock);
-        return 0;
+        return err;
 }
 
 void gm20b_ltc_init_fs_state(struct gk20a *g)