tcmu: Fix wrongly calculating of the base_command_size

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commit abe342a5b4 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>

...

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Xiubo Li 2017-03-27 17:07:41 +08:00 • committed by Greg Kroah-Hartman

parent ef599fa524

commit 890aec8eae

1 changed files with 8 additions and 2 deletions

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drivers/target/target_core_user.c

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