nvgpu: gm20b: Ensure ACR boot failure is returned

Bug 200059877

ACR boot failure is returned in falcon mailbox 0
return EAGAIN in case of ACR boot failure

Change-Id: I683984402137bb42dd69f2d667191d5986144c17
Signed-off-by: Supriya <ssharatkumar@nvidia.com>
Reviewed-on: http://git-master/r/660529
(cherry picked from commit 404c98b704bec5c707bd0c9b03364c8c6d546cbf)
Reviewed-on: http://git-master/r/662476
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Mitch Luban <mluban@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gm20b/acr_gm20b.c b/drivers/gpu/nvgpu/gm20b/acr_gm20b.c
index 2fb3bf9d..677f4eb4 100644
--- a/drivers/gpu/nvgpu/gm20b/acr_gm20b.c
+++ b/drivers/gpu/nvgpu/gm20b/acr_gm20b.c
@@ -1338,6 +1338,11 @@ int pmu_wait_for_halt(struct gk20a *g, unsigned int timeout)
         }
         if (timeout == 0)
                 return -EBUSY;
+        data = gk20a_readl(g, pwr_falcon_mailbox0_r());
+        if (data) {
+                gk20a_err(dev_from_gk20a(g), "ACR boot failed, err %x", data);
+                return -EAGAIN;
+        }
         return 0;
 }