habanalabs: use u64 when comparing variables' sum to u32_max

This patch fixes two smatch warnings about two if statements that are
always true because of the types of the variables used - u32 when
comparing the sum to u32_max.

The patch changes the types to be u64 so the accumalted sum can be checked
if it is larger than u32_max
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/habanalabs/goya/goya.c

@@ -3474,7 +3474,8 @@ u32 goya_get_dma_desc_list_size(struct hl_device *hdev,
 					struct sg_table *sgt)
 {
 	struct scatterlist *sg, *sg_next_iter;
-	u32 count, len, dma_desc_cnt, len_next;
+	u32 count, dma_desc_cnt;
+	u64 len, len_next;
 	dma_addr_t addr, addr_next;
 
 	dma_desc_cnt = 0;
@@ -3915,7 +3916,8 @@ static int goya_patch_dma_packet(struct hl_device *hdev,
 {
 	struct hl_userptr *userptr;
 	struct scatterlist *sg, *sg_next_iter;
-	u32 count, len, dma_desc_cnt, len_next;
+	u32 count, dma_desc_cnt;
+	u64 len, len_next;
 	dma_addr_t dma_addr, dma_addr_next;
 	enum goya_dma_direction user_dir;
 	u64 device_memory_addr, addr;

drivers/misc/habanalabs/goya/goyaP.h

@@ -122,7 +122,7 @@
 #define VA_DDR_SPACE_SIZE	(VA_DDR_SPACE_END - \
 					VA_DDR_SPACE_START)	/* 128GB */
 
-#define DMA_MAX_TRANSFER_SIZE	0xFFFFFFFF
+#define DMA_MAX_TRANSFER_SIZE	U32_MAX
 
 #define HW_CAP_PLL		0x00000001
 #define HW_CAP_DDR_0		0x00000002