1 files changed, 44 insertions, 30 deletions

diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index 653265a40b7f..de3027521bfa 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -10,10 +10,9 @@
 
 static char dmi_empty_string[] = "        ";
 
-static char * __init dmi_string(const struct dmi_header *dm, u8 s)
+static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s)
 {
         const u8 *bp = ((u8 *) dm) + dm->length;
-        char *str = "";
 
         if (s) {
                 s--;
@@ -28,14 +27,29 @@ static char * __init dmi_string(const struct dmi_header *dm, u8 s)
 
                         if (!memcmp(bp, dmi_empty_string, cmp_len))
                                 return dmi_empty_string;
-                        str = dmi_alloc(len);
-                        if (str != NULL)
-                                strcpy(str, bp);
-                        else
-                                printk(KERN_ERR "dmi_string: cannot allocate %Zu bytes.\n", len);
+                        return bp;
                 }
         }
 
+        return "";
+}
+
+static char * __init dmi_string(const struct dmi_header *dm, u8 s)
+{
+        const char *bp = dmi_string_nosave(dm, s);
+        char *str;
+        size_t len;
+
+        if (bp == dmi_empty_string)
+                return dmi_empty_string;
+
+        len = strlen(bp) + 1;
+        str = dmi_alloc(len);
+        if (str != NULL)
+                strcpy(str, bp);
+        else
+                printk(KERN_ERR "dmi_string: cannot allocate %Zu bytes.\n", len);
+
         return str;
 }
 
@@ -167,10 +181,30 @@ static void __init dmi_save_type(const struct dmi_header *dm, int slot, int inde
         dmi_ident[slot] = s;
 }
 
+static void __init dmi_save_one_device(int type, const char *name)
+{
+        struct dmi_device *dev;
+
+        /* No duplicate device */
+        if (dmi_find_device(type, name, NULL))
+                return;
+
+        dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1);
+        if (!dev) {
+                printk(KERN_ERR "dmi_save_one_device: out of memory.\n");
+                return;
+        }
+
+        dev->type = type;
+        strcpy((char *)(dev + 1), name);
+        dev->name = (char *)(dev + 1);
+        dev->device_data = NULL;
+        list_add(&dev->list, &dmi_devices);
+}
+
 static void __init dmi_save_devices(const struct dmi_header *dm)
 {
         int i, count = (dm->length - sizeof(struct dmi_header)) / 2;
-        struct dmi_device *dev;
 
         for (i = 0; i < count; i++) {
                 const char *d = (char *)(dm + 1) + (i * 2);
@@ -179,16 +213,7 @@ static void __init dmi_save_devices(const struct dmi_header *dm)
                 if ((*d & 0x80) == 0)
                         continue;
 
-                dev = dmi_alloc(sizeof(*dev));
-                if (!dev) {
-                        printk(KERN_ERR "dmi_save_devices: out of memory.\n");
-                        break;
-                }
-
-                dev->type = *d++ & 0x7f;
-                dev->name = dmi_string(dm, *d);
-                dev->device_data = NULL;
-                list_add(&dev->list, &dmi_devices);
+                dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d + 1)));
         }
 }
 
@@ -253,23 +278,12 @@ static void __init dmi_save_ipmi_device(const struct dmi_header *dm)
 static void __init dmi_save_extended_devices(const struct dmi_header *dm)
 {
         const u8 *d = (u8*) dm + 5;
-        struct dmi_device *dev;
 
         /* Skip disabled device */
         if ((*d & 0x80) == 0)
                 return;
 
-        dev = dmi_alloc(sizeof(*dev));
-        if (!dev) {
-                printk(KERN_ERR "dmi_save_extended_devices: out of memory.\n");
-                return;
-        }
-
-        dev->type = *d-- & 0x7f;
-        dev->name = dmi_string(dm, *d);
-        dev->device_data = NULL;
-
-        list_add(&dev->list, &dmi_devices);
+        dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1)));
 }
 
 /*