gpu: nvgpu: fix pending bytes check for vidmem

In nvgpu_dma_alloc_flags_vid_at(), we check pending bytes of vidmem which are
yet to be cleared by reading g->mm.vidmem.bytes_pending.atomic_var

If there is something to be cleared we return EAGAIN otherwise we return ENOMEM

But to store above variable we use "int before_pending" which evaluates to zero
for sizes like 4GB and we end up returning ENOMEM instead of EAGAIN

Fix this by declaring before_pending variable as u64

Bug 200427361

Change-Id: I6ffe977e3663a5135fa17699ecafe78ac90d9314
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1770384
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/dma.c b/drivers/gpu/nvgpu/os/linux/dma.c
index 51c8323a..6f17e284 100644
--- a/drivers/gpu/nvgpu/os/linux/dma.c
+++ b/drivers/gpu/nvgpu/os/linux/dma.c
@@ -329,7 +329,7 @@ int nvgpu_dma_alloc_flags_vid_at(struct gk20a *g, unsigned long flags,
         struct nvgpu_allocator *vidmem_alloc = g->mm.vidmem.cleared ?
                 &g->mm.vidmem.allocator :
                 &g->mm.vidmem.bootstrap_allocator;
-        int before_pending;
+        u64 before_pending;
 
         if (nvgpu_mem_is_valid(mem)) {
                 nvgpu_warn(g, "memory leak !!");