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blkdev_aio_read(): switch to generic_file_read_iter(), get rid of iov_shorten()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2014-03-22 06:57:37 -04:00
parent 0c949334a9
commit 3793846354
1 changed files with 6 additions and 3 deletions
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9
fs/block_dev.c
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@ -1538,14 +1538,17 @@ static ssize_t blkdev_aio_read(struct kiocb *iocb, const struct iovec *iov,
struct file *file = iocb->ki_filp;
struct inode *bd_inode = file->f_mapping->host;
loff_t size = i_size_read(bd_inode);
size_t count = iocb->ki_nbytes;
struct iov_iter to;
iov_iter_init(&to, READ, iov, nr_segs, count);
if (pos >= size)
return 0;
size -= pos;
if (size < iocb->ki_nbytes)
nr_segs = iov_shorten((struct iovec *)iov, nr_segs, size);
return generic_file_aio_read(iocb, iov, nr_segs, pos);
iov_iter_truncate(&to, size);
return generic_file_read_iter(iocb, &to);
}
/*