tree 4832fa9192da228bf8273759bf3e3c279475d87c
parent ef599fa52429f7f8fea2d1bf83a49b0377c7dc24
author Xiubo Li <lixiubo@cmss.chinamobile.com> 1490605661 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1492759878 +0200

tcmu: Fix wrongly calculating of the base_command_size

commit abe342a5b4b5aa579f6bf40ba73447c699e6b579 upstream.

The t_data_nents and t_bidi_data_nents are the numbers of the
segments, but it couldn't be sure the block size equals to size
of the segment.

For the worst case, all the blocks are discontiguous and there
will need the same number of iovecs, that's to say: blocks == iovs.
So here just set the number of iovs to block count needed by tcmu
cmd.

Tested-by: Ilias Tsitsimpis <iliastsi@arrikto.com>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Xiubo Li <lixiubo@cmss.chinamobile.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>