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linux-sg2042
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hpfs: fix warnings when the filesystem fills up 

This patch fixes warnings due to missing lock on write error path.

  WARNING: at fs/hpfs/hpfs_fn.h:353 hpfs_truncate+0x75/0x80 [hpfs]()
  Hardware name: empty
  Pid: 26563, comm: dd Tainted: P           O 3.9.4 #12
  Call Trace:
    hpfs_truncate+0x75/0x80 [hpfs]
    hpfs_write_begin+0x84/0x90 [hpfs]
    _hpfs_bmap+0x10/0x10 [hpfs]
    generic_file_buffered_write+0x121/0x2c0
    __generic_file_aio_write+0x1c7/0x3f0
    generic_file_aio_write+0x7c/0x100
    do_sync_write+0x98/0xd0
    hpfs_file_write+0xd/0x50 [hpfs]
    vfs_write+0xa2/0x160
    sys_write+0x51/0xa0
    page_fault+0x22/0x30
    system_call_fastpath+0x1a/0x1f

Signed-off-by: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: stable@kernel.org  # 2.6.39+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mikulas Patocka 2013-06-09 01:25:57 +02:00 committed by Linus Torvalds
parent 81db4dbf59
commit bbd465df73
1 changed files with 4 additions and 0 deletions
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4
fs/hpfs/file.c
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@ -109,10 +109,14 @@ static void hpfs_write_failed(struct address_space *mapping, loff_t to)
{
struct inode *inode = mapping->host;
hpfs_lock(inode->i_sb);
if (to > inode->i_size) {
truncate_pagecache(inode, to, inode->i_size);
hpfs_truncate(inode);
}
hpfs_unlock(inode->i_sb);
}
static int hpfs_write_begin(struct file *file, struct address_space *mapping,