From: Leon Romanovsky <leonro@xxxxxxxxxxxx>
The cmd and index variables declared as u16 and the result is supposed
to be stored in u64. The C arithmetic rules doesn't promote "(index >>
8) << 16" to be u64 and leaves the end result to be u16.
Fixes: 7be76bef320b ("IB/mlx5: Introduce VAR object and its alloc/destroy methods")
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
---
drivers/infiniband/hw/mlx5/main.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index e874d688d040..987bfdcd12a5 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -2283,8 +2283,8 @@ static int mlx5_ib_mmap_offset(struct mlx5_ib_dev *dev,
static u64 mlx5_entry_to_mmap_offset(struct mlx5_user_mmap_entry *entry)
{
- u16 cmd = entry->rdma_entry.start_pgoff >> 16;
- u16 index = entry->rdma_entry.start_pgoff & 0xFFFF;
+ u64 cmd = (entry->rdma_entry.start_pgoff >> 16) & 0xFFFF;
+ u64 index = entry->rdma_entry.start_pgoff & 0xFFFF;
return (((index >> 8) << 16) | (cmd << MLX5_IB_MMAP_CMD_SHIFT) |
(index & 0xFF)) << PAGE_SHIFT;
--
2.24.1
