Cast p to dma_addr_t in order to avoid a potential integer overflow.
This variable is being used in a context that expects an expression
of type dma_addr_t (u64).
The expression p << PAGE_SHIFT is currently being evaluated
using 32-bit arithmetic.
Addresses-Coverity-ID: 1458347 ("Unintentional integer overflow")
Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
---
Changes in v2:
- Update subject and changelog to better reflect the proposed code change.
Changes in v3:
- Mention the specific Coverity report in the commit message.
drivers/media/platform/rockchip/rga/rga-buf.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/rockchip/rga/rga-buf.c b/drivers/media/platform/rockchip/rga/rga-buf.c
index 49cacc7..a43b57a 100644
--- a/drivers/media/platform/rockchip/rga/rga-buf.c
+++ b/drivers/media/platform/rockchip/rga/rga-buf.c
@@ -140,7 +140,8 @@ void rga_buf_map(struct vb2_buffer *vb)
address = sg_phys(sgl);
for (p = 0; p < len; p++) {
- dma_addr_t phys = address + (p << PAGE_SHIFT);
+ dma_addr_t phys = address +
+ ((dma_addr_t)p << PAGE_SHIFT);
pages[mapped_size + p] = phys;
}
--
2.7.4
