gpu: nvgpu: restore 50ms unmap wait for fixed bufs

Increase sync-unmap wait time from 5 ms to 50 ms.
6ccac11b4dd1a4eaf9c914fd567cdf7922184e28 decreased the wait tenfold, so
this puts it back.

Bug 1650025
Bug 200078514

Change-Id: I53a4ea115536ca2ff5d6aa701547c7477ac6e4ea
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/748224
(cherry picked from commit 7c22a24817f0880941e6f4343059fa303ec9eff5)
Reviewed-on: http://git-master/r/753285
Reviewed-by: Automatic_Commit_Validation_User
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/gk20a/mm_gk20a.c b/drivers/gpu/nvgpu/gk20a/mm_gk20a.c
index f5ce886a..1761d882 100644
--- a/drivers/gpu/nvgpu/gk20a/mm_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/mm_gk20a.c
@@ -810,7 +810,7 @@ void gk20a_vm_put_buffers(struct vm_gk20a *vm,
 static void gk20a_vm_unmap_user(struct vm_gk20a *vm, u64 offset)
 {
         struct device *d = dev_from_vm(vm);
-        int retries = 1000;
+        int retries = 10000; /* 50 ms */
         struct mapped_buffer_node *mapped_buffer;
 
         mutex_lock(&vm->update_gmmu_lock);