gpu: nvgpu: fix compbit_store page allocation

Allocate enough pages in the case that compbit_backing_size is not a
power of two.

Change-Id: Iaa2da66a3d1bd86ac746ed619a7f37e9379904db
Signed-off-by: Edgardo Handal <ehandal@nvidia.com>
Reviewed-on: http://git-master/r/449460
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/ltc_common.c b/drivers/gpu/nvgpu/gk20a/ltc_common.c
index 55e822f6..2d611d48 100644
--- a/drivers/gpu/nvgpu/gk20a/ltc_common.c
+++ b/drivers/gpu/nvgpu/gk20a/ltc_common.c
@@ -136,12 +136,12 @@ static int gk20a_ltc_alloc_phys_cbc(struct gk20a *g,
                                     size_t compbit_backing_size)
 {
         struct gr_gk20a *gr = &g->gr;
-        int order = ffs(compbit_backing_size >> PAGE_SHIFT);
+        int order = order_base_2(compbit_backing_size >> PAGE_SHIFT);
         struct page *pages;
         struct sg_table *sgt;
         int err = 0;
 
-        /* allocate few pages */
+        /* allocate pages */
         pages = alloc_pages(GFP_KERNEL, order);
         if (!pages) {
                 gk20a_dbg(gpu_dbg_pte, "alloc_pages failed\n");