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-rw-r--r--fs/btrfs/file.c26
1 files changed, 14 insertions, 12 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 59e2dccdf75b..ad53832838b5 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1875,16 +1875,25 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
ssize_t num_written = 0;
bool sync = (file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host);
ssize_t err;
- loff_t pos = iocb->ki_pos;
+ loff_t pos;
size_t count = iov_iter_count(from);
loff_t oldsize;
int clean_page = 0;
- if ((iocb->ki_flags & IOCB_NOWAIT) &&
- (iocb->ki_flags & IOCB_DIRECT)) {
- /* Don't sleep on inode rwsem */
- if (!inode_trylock(inode))
+ if (!inode_trylock(inode)) {
+ if (iocb->ki_flags & IOCB_NOWAIT)
return -EAGAIN;
+ inode_lock(inode);
+ }
+
+ err = generic_write_checks(iocb, from);
+ if (err <= 0) {
+ inode_unlock(inode);
+ return err;
+ }
+
+ pos = iocb->ki_pos;
+ if (iocb->ki_flags & IOCB_NOWAIT) {
/*
* We will allocate space in case nodatacow is not set,
* so bail
@@ -1895,13 +1904,6 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
inode_unlock(inode);
return -EAGAIN;
}
- } else
- inode_lock(inode);
-
- err = generic_write_checks(iocb, from);
- if (err <= 0) {
- inode_unlock(inode);
- return err;
}
current->backing_dev_info = inode_to_bdi(inode);