gpu: nvgpu: Fix mutex MISRA 17.7 violations

MISRA Rule-17.7 requires the return value of all functions to be used.
Fix is either to use the return value or change the function to return
void. This patch contains fix for calls to nvgpu_mutex_init and
improves related error handling.

JIRA NVGPU-677

Change-Id: I609fa138520cc7ccfdd5aa0e7fd28c8ca0b3a21c
Signed-off-by: Nicolas Benech <nbenech@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1805598
Reviewed-by: svc-misra-checker <svc-misra-checker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gv100/nvlink_gv100.c b/drivers/gpu/nvgpu/gv100/nvlink_gv100.c
index b39e4165..3e1b2cda 100644
--- a/drivers/gpu/nvgpu/gv100/nvlink_gv100.c
+++ b/drivers/gpu/nvgpu/gv100/nvlink_gv100.c
@@ -2715,7 +2715,11 @@ int gv100_nvlink_early_init(struct gk20a *g)
                 goto nvlink_init_exit;
         }
 
-        nvgpu_flcn_sw_init(g, FALCON_ID_MINION);
+        err = nvgpu_flcn_sw_init(g, FALCON_ID_MINION);
+        if (err != 0) {
+                nvgpu_err(g, "failed to sw init FALCON_ID_MINION");
+                goto nvlink_init_exit;
+        }
 
         g->nvlink.discovered_links &= ~g->nvlink.link_disable_mask;
         nvgpu_log(g, gpu_dbg_nvlink, "link_disable_mask = 0x%08x (from VBIOS)",