zorro: use memory_read_from_buffer

zorro: use memory_read_from_buffer
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/zorro/zorro-sysfs.c

@@ -15,6 +15,7 @@
 #include <linux/zorro.h>
 #include <linux/stat.h>
 #include <linux/string.h>
+#include <linux/fs.h>
 
 #include "zorro.h"
 
@@ -56,12 +57,6 @@ static ssize_t zorro_read_config(struct kobject *kobj,
 	struct zorro_dev *z = to_zorro_dev(container_of(kobj, struct device,
 					   kobj));
 	struct ConfigDev cd;
-	unsigned int size = sizeof(cd);
-
-	if (off > size)
-		return 0;
-	if (off+count > size)
-		count = size-off;
 
 	/* Construct a ConfigDev */
 	memset(&cd, 0, sizeof(cd));
@@ -71,8 +66,7 @@ static ssize_t zorro_read_config(struct kobject *kobj,
 	cd.cd_BoardAddr = (void *)zorro_resource_start(z);
 	cd.cd_BoardSize = zorro_resource_len(z);
 
-	memcpy(buf, (void *)&cd+off, count);
-	return count;
+	return memory_read_from_buffer(buf, count, &off, &cd, sizeof(cd));
 }
 
 static struct bin_attribute zorro_config_attr = {