gpu: nvgpu: do not access register in vidmem destroy

Do vidmem destroy only if get_vidmem_size HAL op is
set which will skip this for iGPU. Do not read vidmem
size explicitly in vidmem destroy in shutdown path after
prepare poweroff.

Bug 200427479

Change-Id: Ic919b03d44b5505646b449fd74f9f5d3e9e0dfee
Signed-off-by: Aparna Das <aparnad@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1776388
Reviewed-by: svc-misra-checker <svc-misra-checker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Richard Zhao <rizhao@nvidia.com>
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: Nirav Patel <nipatel@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 1 insertions, 6 deletions

diff --git a/drivers/gpu/nvgpu/common/mm/vidmem.c b/drivers/gpu/nvgpu/common/mm/vidmem.c
index b6e1919f..febf6830 100644
--- a/drivers/gpu/nvgpu/common/mm/vidmem.c
+++ b/drivers/gpu/nvgpu/common/mm/vidmem.c
@@ -39,13 +39,8 @@
 void nvgpu_vidmem_destroy(struct gk20a *g)
 {
         struct nvgpu_timeout timeout;
-        size_t size;
 
-        size = g->ops.mm.get_vidmem_size ?
-                        g->ops.mm.get_vidmem_size(g) : 0;
-
-        /* Nothing to destroy if no vidmem */
-        if (!size)
+        if (!g->ops.mm.get_vidmem_size)
                 return;
 
         nvgpu_timeout_init(g, &timeout, 100, NVGPU_TIMER_RETRY_TIMER);