lib: percpu_counter_init error handling

alloc_percpu can fail, propagate that error.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 42 insertions, 15 deletions

diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 639a32c..2690e46 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -653,6 +653,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
 	int db_count;
 	int i, j;
 	__le32 features;
+	int err;
 
 	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
 	if (!sbi)
@@ -906,12 +907,20 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
 	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
 	spin_lock_init(&sbi->s_next_gen_lock);
 
-	percpu_counter_init(&sbi->s_freeblocks_counter,
+	err = percpu_counter_init(&sbi->s_freeblocks_counter,
 				ext2_count_free_blocks(sb));
-	percpu_counter_init(&sbi->s_freeinodes_counter,
+	if (!err) {
+		err = percpu_counter_init(&sbi->s_freeinodes_counter,
 				ext2_count_free_inodes(sb));
-	percpu_counter_init(&sbi->s_dirs_counter,
+	}
+	if (!err) {
+		err = percpu_counter_init(&sbi->s_dirs_counter,
 				ext2_count_dirs(sb));
+	}
+	if (err) {
+		printk(KERN_ERR "EXT2-fs: insufficient memory\n");
+		goto failed_mount3;
+	}
 	/*
 	 * set up enough so that it can read an inode
 	 */
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index c5a52c9..ac5c6b0 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1416,6 +1416,7 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 	int i;
 	int needs_recovery;
 	__le32 features;
+	int err;
 
 	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
 	if (!sbi)
@@ -1675,12 +1676,20 @@ static int ext3_fill_super (struct super_block *sb, void *data, int silent)
 	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
 	spin_lock_init(&sbi->s_next_gen_lock);
 
-	percpu_counter_init(&sbi->s_freeblocks_counter,
-		ext3_count_free_blocks(sb));
-	percpu_counter_init(&sbi->s_freeinodes_counter,
-		ext3_count_free_inodes(sb));
-	percpu_counter_init(&sbi->s_dirs_counter,
-		ext3_count_dirs(sb));
+	err = percpu_counter_init(&sbi->s_freeblocks_counter,
+			ext3_count_free_blocks(sb));
+	if (!err) {
+		err = percpu_counter_init(&sbi->s_freeinodes_counter,
+				ext3_count_free_inodes(sb));
+	}
+	if (!err) {
+		err = percpu_counter_init(&sbi->s_dirs_counter,
+				ext3_count_dirs(sb));
+	}
+	if (err) {
+		printk(KERN_ERR "EXT3-fs: insufficient memory\n");
+		goto failed_mount3;
+	}
 
 	/* per fileystem reservation list head & lock */
 	spin_lock_init(&sbi->s_rsv_window_lock);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 1814d4b8..157c64c 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1479,6 +1479,7 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
 	int needs_recovery;
 	__le32 features;
 	__u64 blocks_count;
+	int err;
 
 	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
 	if (!sbi)
@@ -1759,12 +1760,20 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
 	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
 	spin_lock_init(&sbi->s_next_gen_lock);
 
-	percpu_counter_init(&sbi->s_freeblocks_counter,
-		ext4_count_free_blocks(sb));
-	percpu_counter_init(&sbi->s_freeinodes_counter,
-		ext4_count_free_inodes(sb));
-	percpu_counter_init(&sbi->s_dirs_counter,
-		ext4_count_dirs(sb));
+	err = percpu_counter_init(&sbi->s_freeblocks_counter,
+			ext4_count_free_blocks(sb));
+	if (!err) {
+		err = percpu_counter_init(&sbi->s_freeinodes_counter,
+				ext4_count_free_inodes(sb));
+	}
+	if (!err) {
+		err = percpu_counter_init(&sbi->s_dirs_counter,
+				ext4_count_dirs(sb));
+	}
+	if (err) {
+		printk(KERN_ERR "EXT4-fs: insufficient memory\n");
+		goto failed_mount3;
+	}
 
 	/* per fileystem reservation list head & lock */
 	spin_lock_init(&sbi->s_rsv_window_lock);