fs/partition/check.c: fix return value warning

fs/partitions/check.c:381: warning: ignoring return value of ___device_add___,
  declared with attribute warn_unused_result

[akpm@linux-foundation.org: multiple-return-statements-per-function are evil]
Signed-off-by: Abdel Benamrouche <draconux@gmail.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index efef715..2e6413f 100644 (file)
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -344,18 +344,18 @@ static ssize_t whole_disk_show(struct device *dev,
 static DEVICE_ATTR(whole_disk, S_IRUSR | S_IRGRP | S_IROTH,
                   whole_disk_show, NULL);
 
-void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len, int flags)
+int add_partition(struct gendisk *disk, int part, sector_t start, sector_t len, int flags)
 {
        struct hd_struct *p;
        int err;
 
        p = kzalloc(sizeof(*p), GFP_KERNEL);
        if (!p)
-               return;
+               return -ENOMEM;
 
        if (!init_part_stats(p)) {
-               kfree(p);
-               return;
+               err = -ENOMEM;
+               goto out0;
        }
        p->start_sect = start;
        p->nr_sects = len;
@@ -378,15 +378,31 @@ void add_partition(struct gendisk *disk, int part, sector_t start, sector_t len,
 
        /* delay uevent until 'holders' subdir is created */
        p->dev.uevent_suppress = 1;
-       device_add(&p->dev);
+       err = device_add(&p->dev);
+       if (err)
+               goto out1;
        partition_sysfs_add_subdir(p);
        p->dev.uevent_suppress = 0;
-       if (flags & ADDPART_FLAG_WHOLEDISK)
+       if (flags & ADDPART_FLAG_WHOLEDISK) {
                err = device_create_file(&p->dev, &dev_attr_whole_disk);
+               if (err)
+                       goto out2;
+       }
 
        /* suppress uevent if the disk supresses it */
        if (!disk->dev.uevent_suppress)
                kobject_uevent(&p->dev.kobj, KOBJ_ADD);
+
+       return 0;
+
+out2:
+       device_del(&p->dev);
+out1:
+       put_device(&p->dev);
+       free_part_stats(p);
+out0:
+       kfree(p);
+       return err;
 }
 
 /* Not exported, helper to add_disk(). */

diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index e878741..118216f 100644 (file)
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -541,7 +541,7 @@ extern dev_t blk_lookup_devt(const char *name, int part);
 extern char *disk_name (struct gendisk *hd, int part, char *buf);
 
 extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev);
-extern void add_partition(struct gendisk *, int, sector_t, sector_t, int);
+extern int __must_check add_partition(struct gendisk *, int, sector_t, sector_t, int);
 extern void delete_partition(struct gendisk *, int);
 extern void printk_all_partitions(void);