author Lars Ellenberg <lars.ellenberg@linbit.com> 1281562080 +0200
committer Philipp Reisner <philipp.reisner@linbit.com> 1287074299 +0200

drbd: reduce code duplication when receiving data requests

also canonicalize the return values of read_for_csum
and drbd_rs_begin_io to return -ESOMETHING, or 0 for success.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
$̲d–5x