diff --git a/arch/arm/mach-rk29/vpu_mem.c b/arch/arm/mach-rk29/vpu_mem.c
index 03f59f110773..d70943e2e618 100644
--- a/arch/arm/mach-rk29/vpu_mem.c
+++ b/arch/arm/mach-rk29/vpu_mem.c
@@ -428,7 +428,7 @@ static long vpu_mem_allocate(struct file *file, unsigned int len)
 	 */
 	while (curr < vpu_mem.num_entries) {
 		if (VPU_MEM_IS_FREE(curr)) {
-			if (VPU_MEM_PFN(curr) >= (unsigned char)pfn) {
+			if (VPU_MEM_PFN(curr) >= pfn) {
 				/* set the not free bit and clear others */
 				best_fit = curr;
 #if VPU_MEM_DEBUG