1 files changed, 2 insertions, 1 deletions

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 1cb694c96500..25df5b03b591 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1885,7 +1885,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
         bool sync = (file->f_flags & O_DSYNC) || IS_SYNC(file->f_mapping->host);
         ssize_t err;
         loff_t pos;
-        size_t count = iov_iter_count(from);
+        size_t count;
         loff_t oldsize;
         int clean_page = 0;
 
@@ -1906,6 +1906,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
         }
 
         pos = iocb->ki_pos;
+        count = iov_iter_count(from);
         if (iocb->ki_flags & IOCB_NOWAIT) {
                 /*
                  * We will allocate space in case nodatacow is not set,