video: tegra: host: pva: Add pin/unpin buffer count limit

Check buffer count to prevent overflows in byte count
calculations.

Coverity ID 38903
Bug 200192445

Change-Id: I258fa8592f4c2920e3973454c48a146b3ca29592
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-on: http://git-master/r/1279992
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/uapi/linux/nvhost_pva_ioctl.h b/include/uapi/linux/nvhost_pva_ioctl.h
index 9a570bbe3..d9052539d 100644
--- a/include/uapi/linux/nvhost_pva_ioctl.h
+++ b/include/uapi/linux/nvhost_pva_ioctl.h
@@ -80,6 +80,8 @@ struct pva_pin_unpin_args {
         __u32 reserved;
 };
 
+#define PVA_MAX_PIN_BUFFERS     256
+
 /**
  * struct pva_ioctl_status_handle - A handle to a status structure
  *