Fixed logic to return data back to user

Change-Id: I324d07c38e8d7eb202d4dccfed6e62006cf9cd29
Signed-off-by: Serguei Sagalovitch <Serguei.Sagalovitch@amd.com>

tests/rdma/simple/app/rdma_test.cpp

@@ -130,7 +130,7 @@ void run_rdma_tests(HSAuint32 Node, HsaMemoryProperties *MemoryProperty)
 
     ret = ioctl(rdma_fd, AMD2P2PTEST_IOCTL_GET_PAGE_SIZE, &get_page_size);
 
-    if (ret < 0)
+    if (ret != 0)
     {
         fprintf(stderr,
                 "AMD2P2PTEST_IOCTL_GET_PAGE_SIZE error (errno=%d/%s)\n",
@@ -146,7 +146,7 @@ void run_rdma_tests(HSAuint32 Node, HsaMemoryProperties *MemoryProperty)
 
     ret = ioctl(rdma_fd, AMD2P2PTEST_IOCTL_GET_PAGES, &get_cpu_ptr);
 
-    if (ret < 0)
+    if (ret != 0)
     {
         fprintf(stderr, "AMD2P2PTEST_IOCTL_GET_PAGES error (errno=%d/%s)\n",
                          ret, strerror(ret));

tests/rdma/simple/drv/amdp2ptest.c

@@ -183,8 +183,7 @@ static int ioctl_get_page_size(struct file *filp, unsigned long arg)
 	params.page_size = page_size;
 	MSG_INFO("Page size %llx\n", params.page_size);
 
-	if (result && copy_to_user((void *)arg, &params,
-						sizeof(params))) {
+	if (copy_to_user((void *)arg, &params, sizeof(params))) {
 		MSG_ERR("copy_to_user failed on user pointer %p\n",
 						(void *)arg);