[PATCH] sparc: ioport.c: audit return code of create_proc_read_entry()

From: Christophe Lucas <clucas@rotomalug.org>

Signed-off-by: Christophe Lucas <clucas@rotomalug.org>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>

Index: linux-kj/arch/sparc/kernel/ioport.c
===================================================================
--- linux-kj.orig/arch/sparc/kernel/ioport.c
+++ linux-kj/arch/sparc/kernel/ioport.c
@@ -725,7 +725,16 @@ _sparc_find_resource(struct resource *ro
 void register_proc_sparc_ioport(void)
 {
 #ifdef CONFIG_PROC_FS
-	create_proc_read_entry("io_map",0,NULL,_sparc_io_get_info,&sparc_iomap);
-	create_proc_read_entry("dvma_map",0,NULL,_sparc_io_get_info,&_sparc_dvma);
+	struct proc_dir_entry *ent;
+	ent = create_proc_read_entry("io_map",0,NULL,
+		_sparc_io_get_info,&sparc_iomap);
+	if (!ent)
+		printk(KERN_WARNING 
+			"ioport.c: unable to create io_map /proc entry\n");
+	ent = create_proc_read_entry("dvma_map",0,NULL,
+		_sparc_io_get_info,&_sparc_dvma);
+	if (!ent)
+		printk(KERN_WARNING 
+			"ioport.c: unable to create dvma_map /proc entry\n");
 #endif
 }