diff options
| author | Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz> | 2015-07-01 16:38:22 +1200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2015-08-12 20:47:29 -0400 |
| commit | 3799b3f4adff8b00017340d0b9b41a99e0cc3804 (patch) | |
| tree | 726c646ec132970909f249e3eb780ec76cceefed | |
| parent | 39d0ce06599c73e6e5b8d8c43c64e5272694cbbc (diff) | |
JFFS2: Return early when file read not necessary
If a destination is not provided, jffs2_1pass_read_inode() only
returns the length of the file. In this case, avoid reading all
the data nodes, and return as soon as the length of the file is
known.
Signed-off-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
| -rw-r--r-- | fs/jffs2/jffs2_1pass.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/jffs2/jffs2_1pass.c b/fs/jffs2/jffs2_1pass.c index b1d64702192..2e569ff59bb 100644 --- a/fs/jffs2/jffs2_1pass.c +++ b/fs/jffs2/jffs2_1pass.c @@ -719,6 +719,12 @@ jffs2_1pass_read_inode(struct b_lists *pL, u32 inode, char *dest) } put_fl_mem(jNode, pL->readbuf); } + /* + * If no destination is provided, we are done. + * Just return the total size. + */ + if (!dest) + return totalSize; #endif for (b = pL->frag.listHead; b != NULL; b = b->next) { |