udf: Cleanup calling convention of inode_getblk()

inode_getblk() always returned NULL and passed results in its parameters.
Make the function return something useful - found block number.

Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 4fd1d80..1bd2c42 100644 (file)
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -53,8 +53,7 @@ static int udf_update_inode(struct inode *, int);
 static void udf_fill_inode(struct inode *, struct buffer_head *);
 static int udf_sync_inode(struct inode *inode);
 static int udf_alloc_i_data(struct inode *inode, size_t size);
-static struct buffer_head *inode_getblk(struct inode *, sector_t, int *,
-                                       sector_t *, int *);
+static sector_t inode_getblk(struct inode *, sector_t, int *, int *);
 static int8_t udf_insert_aext(struct inode *, struct extent_position,
                              struct kernel_lb_addr, uint32_t);
 static void udf_split_extents(struct inode *, int *, int, int,
@@ -310,7 +309,6 @@ static int udf_get_block(struct inode *inode, sector_t block,
                         struct buffer_head *bh_result, int create)
 {
        int err, new;
-       struct buffer_head *bh;
        sector_t phys = 0;
        struct udf_inode_info *iinfo;
 
@@ -323,7 +321,6 @@ static int udf_get_block(struct inode *inode, sector_t block,
 
        err = -EIO;
        new = 0;
-       bh = NULL;
        iinfo = UDF_I(inode);
 
        down_write(&iinfo->i_data_sem);
@@ -332,13 +329,10 @@ static int udf_get_block(struct inode *inode, sector_t block,
                iinfo->i_next_alloc_goal++;
        }
 
-       err = 0;
 
-       bh = inode_getblk(inode, block, &err, &phys, &new);
-       BUG_ON(bh);
-       if (err)
+       phys = inode_getblk(inode, block, &err, &new);
+       if (!phys)
                goto abort;
-       BUG_ON(!phys);
 
        if (new)
                set_buffer_new(bh_result);
@@ -547,11 +541,10 @@ out:
        return err;
 }
 
-static struct buffer_head *inode_getblk(struct inode *inode, sector_t block,
-                                       int *err, sector_t *phys, int *new)
+static sector_t inode_getblk(struct inode *inode, sector_t block,
+                            int *err, int *new)
 {
        static sector_t last_block;
-       struct buffer_head *result = NULL;
        struct kernel_long_ad laarr[EXTENT_MERGE_SIZE];
        struct extent_position prev_epos, cur_epos, next_epos;
        int count = 0, startnum = 0, endnum = 0;
@@ -566,6 +559,8 @@ static struct buffer_head *inode_getblk(struct inode *inode, sector_t block,
        int goal = 0, pgoal = iinfo->i_location.logicalBlockNum;
        int lastblock = 0;
 
+       *err = 0;
+       *new = 0;
        prev_epos.offset = udf_file_entry_alloc_offset(inode);
        prev_epos.block = iinfo->i_location;
        prev_epos.bh = NULL;
@@ -635,8 +630,7 @@ static struct buffer_head *inode_getblk(struct inode *inode, sector_t block,
                brelse(cur_epos.bh);
                brelse(next_epos.bh);
                newblock = udf_get_lb_pblock(inode->i_sb, &eloc, offset);
-               *phys = newblock;
-               return NULL;
+               return newblock;
        }
 
        last_block = block;
@@ -664,7 +658,7 @@ static struct buffer_head *inode_getblk(struct inode *inode, sector_t block,
                        brelse(cur_epos.bh);
                        brelse(next_epos.bh);
                        *err = ret;
-                       return NULL;
+                       return 0;
                }
                c = 0;
                offset = 0;
@@ -729,7 +723,7 @@ static struct buffer_head *inode_getblk(struct inode *inode, sector_t block,
                if (!newblocknum) {
                        brelse(prev_epos.bh);
                        *err = -ENOSPC;
-                       return NULL;
+                       return 0;
                }
                iinfo->i_lenExtents += inode->i_sb->s_blocksize;
        }
@@ -761,10 +755,10 @@ static struct buffer_head *inode_getblk(struct inode *inode, sector_t block,
 
        newblock = udf_get_pblock(inode->i_sb, newblocknum,
                                iinfo->i_location.partitionReferenceNum, 0);
-       if (!newblock)
-               return NULL;
-       *phys = newblock;
-       *err = 0;
+       if (!newblock) {
+               *err = -EIO;
+               return 0;
+       }
        *new = 1;
        iinfo->i_next_alloc_block = block;
        iinfo->i_next_alloc_goal = newblocknum;
@@ -775,7 +769,7 @@ static struct buffer_head *inode_getblk(struct inode *inode, sector_t block,
        else
                mark_inode_dirty(inode);
 
-       return result;
+       return newblock;
 }
 
 static void udf_split_extents(struct inode *inode, int *c, int offset,