zonefs: count pages after truncating the iterator
Count pages after possibly truncating the iterator to the maximum zone
append size, not before.
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index e419833..abfb17f 100644
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -607,14 +607,14 @@ static ssize_t zonefs_file_dio_append(struct kiocb *iocb, struct iov_iter *from)
int nr_pages;
ssize_t ret;
- nr_pages = iov_iter_npages(from, BIO_MAX_PAGES);
- if (!nr_pages)
- return 0;
-
max = queue_max_zone_append_sectors(bdev_get_queue(bdev));
max = ALIGN_DOWN(max << SECTOR_SHIFT, inode->i_sb->s_blocksize);
iov_iter_truncate(from, max);
+ nr_pages = iov_iter_npages(from, BIO_MAX_PAGES);
+ if (!nr_pages)
+ return 0;
+
bio = bio_alloc_bioset(GFP_NOFS, nr_pages, &fs_bio_set);
if (!bio)
return -ENOMEM;