s390/dasd: Use struct_size() helper
authorGustavo A. R. Silva <gustavoars@kernel.org>
Tue, 14 Jul 2020 20:03:27 +0000 (22:03 +0200)
committerJens Axboe <axboe@kernel.dk>
Wed, 15 Jul 2020 14:47:11 +0000 (08:47 -0600)
commit10321aa17ae9ad9b1335d61aeabb6f63d38cc28e
tree26db85a9bff8c0d3bbd2b6677cd152d407c6a825
parent9f4aa52387c68049403b59939df5c0dd8e3872cc
s390/dasd: Use struct_size() helper

Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes. Also, remove unnecessary
variable _datasize_.

This code was detected with the help of Coccinelle and, audited and
fixed manually.

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
drivers/s390/block/dasd_diag.c