tree dba90f93fab86f1d1cacdd0a9cc4033060713bdd
parent d26377b83972917cfb8f5bee193981aaa1130627
author Tejun Heo <tj@kernel.org> 1282555647 +0200
committer Jeff Garzik <jgarzik@redhat.com> 1282778656 -0400

libata: be less of a drama queen on empty data commands

ata_qc_issue() BUG_ON()s on data commands w/o data, which may be
submitted via SG_IO.  Be less of a drama queen and just trigger
WARN_ON_ONCE() and fail the command with AC_ERR_SYSTEM.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Stefan Hübner <stefan.huebner@stud.tu-ilmenau.de>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>