lift generic_write_checks() into callers of __generic_file_write_iter()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 6e3de63..bcd7f97 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1597,6 +1597,16 @@
struct file *file = iocb->ki_filp;
struct blk_plug plug;
ssize_t ret;
+ size_t count = iov_iter_count(from);
+
+ ret = generic_write_checks(file, &iocb->ki_pos, &count, 1);
+ if (ret)
+ return ret;
+
+ if (count == 0)
+ return 0;
+
+ iov_iter_truncate(from, count);
blk_start_plug(&plug);
ret = __generic_file_write_iter(iocb, from);