gpu: nvgpu: use vzalloc for mm entries

When system is in low memory, kzalloc will fail if
kernel requests more than PAGE_SIZE continous memory block.

Bug 200096099

Change-Id: I44e217ffa6aa6c453a4d4afba45a8ee3b5756cc1
Signed-off-by: Kerwin Wan <kerwinw@nvidia.com>
Reviewed-on: http://git-master/r/732197
(cherry picked from commit 62861976421415f93e98a0a9f977ac1f66046714)
Reviewed-on: http://git-master/r/737057
Reviewed-by: Krishna Reddy <vdumpa@nvidia.com>
Tested-by: Krishna Reddy <vdumpa@nvidia.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/mm_gk20a.c b/drivers/gpu/nvgpu/gk20a/mm_gk20a.c
index d896d783..5e1505c4 100644
--- a/drivers/gpu/nvgpu/gk20a/mm_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/mm_gk20a.c
@@ -2288,8 +2288,8 @@ static int update_gmmu_level_locked(struct vm_gk20a *vm,
                                          (l->hi_bit[pgsz_idx]
                                           - l->lo_bit[pgsz_idx] + 1);
                                 pte->entries =
-                                        kzalloc(sizeof(struct gk20a_mm_entry) *
-                                                num_entries, GFP_KERNEL);
+                                        vzalloc(sizeof(struct gk20a_mm_entry) *
+                                                num_entries);
                                 if (!pte->entries)
                                         return -ENOMEM;
                                 pte->pgsz = pgsz_idx;
@@ -2504,7 +2504,7 @@ static void gk20a_vm_free_entries(struct vm_gk20a *vm,
 
         if (parent->size)
                 free_gmmu_pages(vm, parent);
-        kfree(parent->entries);
+        vfree(parent->entries);
         parent->entries = NULL;
 }
 
@@ -2635,8 +2635,8 @@ int gk20a_init_vm(struct mm_gk20a *mm,
         pde_range_from_vaddr_range(vm,
                                    0, vm->va_limit-1,
                                    &pde_lo, &pde_hi);
-        vm->pdb.entries = kzalloc(sizeof(struct gk20a_mm_entry) *
-                        (pde_hi + 1), GFP_KERNEL);
+        vm->pdb.entries = vzalloc(sizeof(struct gk20a_mm_entry) *
+                        (pde_hi + 1));
         vm->pdb.num_entries = pde_hi + 1;
 
         if (!vm->pdb.entries)
@@ -2703,7 +2703,7 @@ clean_up_small_allocator:
 clean_up_ptes:
         free_gmmu_pages(vm, &vm->pdb);
 clean_up_pdes:
-        kfree(vm->pdb.entries);
+        vfree(vm->pdb.entries);
         return err;
 }