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hfsplus: fix return value of hfsplus_get_block() 

Direct writes to empty inodes fail with EIO.  The generic direct-io code
is in part to blame (a patch has been submitted as "direct-io: allow
direct writes to empty inodes"), but hfsplus is worse affected than the
other filesystems because the fallback to buffered I/O doesn't happen.

The problem is the return value of hfsplus_get_block() when called with
!create.  Change it to be more consistent with the other modules.

Link: http://lkml.kernel.org/r/2cd1301404ec7cf1e39c8f11a01a4302f1460ad6.1539195310.git.ernesto.mnd.fernandez@gmail.com
Signed-off-by: Ernesto A. Fernández <ernesto.mnd.fernandez@gmail.com>
Reviewed-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Ernesto A. Fernández 2018-10-30 15:06:21 -07:00 committed by Linus Torvalds
parent 54640c7502
commit 839c3a6a5e
1 changed files with 3 additions and 1 deletions
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4
fs/hfsplus/extents.c
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@ -237,7 +237,9 @@ int hfsplus_get_block(struct inode *inode, sector_t iblock,
ablock = iblock >> sbi->fs_shift;
if (iblock >= hip->fs_blocks) {
if (iblock > hip->fs_blocks || !create)
if (!create)
return 0;
if (iblock > hip->fs_blocks)
return -EIO;
if (ablock >= hip->alloc_blocks) {
res = hfsplus_file_extend(inode, false);