IB/core: trivial prink cleanup.

1. Replaced printk with appropriate pr_warn, pr_err, pr_info.
2. Removed unnecessary prints around memory allocation failure
which are not required, as reported by the checkpatch script.

Signed-off-by: Parav Pandit <pandit.parav@gmail.com>
Reviewed-by: Haggai Eran <haggaie@mellanox.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/core/ucm.c b/drivers/infiniband/core/ucm.c
index 6b4e8a0..4a9aa04 100644
--- a/drivers/infiniband/core/ucm.c
+++ b/drivers/infiniband/core/ucm.c
@@ -1234,7 +1234,7 @@
 		ret = alloc_chrdev_region(&overflow_maj, 0, IB_UCM_MAX_DEVICES,
 					  "infiniband_cm");
 		if (ret) {
-			printk(KERN_ERR "ucm: couldn't register dynamic device number\n");
+			pr_err("ucm: couldn't register dynamic device number\n");
 			return ret;
 		}
 	}
@@ -1329,19 +1329,19 @@
 	ret = register_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES,
 				     "infiniband_cm");
 	if (ret) {
-		printk(KERN_ERR "ucm: couldn't register device number\n");
+		pr_err("ucm: couldn't register device number\n");
 		goto error1;
 	}
 
 	ret = class_create_file(&cm_class, &class_attr_abi_version.attr);
 	if (ret) {
-		printk(KERN_ERR "ucm: couldn't create abi_version attribute\n");
+		pr_err("ucm: couldn't create abi_version attribute\n");
 		goto error2;
 	}
 
 	ret = ib_register_client(&ucm_client);
 	if (ret) {
-		printk(KERN_ERR "ucm: couldn't register client\n");
+		pr_err("ucm: couldn't register client\n");
 		goto error3;
 	}
 	return 0;