Commit 63af3438 authored by Roland Dreier's avatar Roland Dreier Committed by Jiri Slaby
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target: Don't call TFO->write_pending if data_length == 0 



commit 885e7b0e upstream.

If an initiator sends a zero-length command (e.g. TEST UNIT READY) but
sets the transfer direction in the transport layer to indicate a
data-out phase, we still shouldn't try to transfer data.  At best it's
a NOP, and depending on the transport, we might crash on an
uninitialized sg list.

Reported-by: default avatarCraig Watson <craig.watson@vanguard-rugged.com>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
parent 090ec5fe
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