Nicholas Bellinger b2c9f833b0 target: Fix COMPARE_AND_WRITE with SG_TO_MEM_NOALLOC handling ... commit c8e639852a upstream. This patch fixes a bug for COMPARE_AND_WRITE handling with fabrics using SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC. It adds the missing allocation for cmd->t_bidi_data_sg within transport_generic_new_cmd() that is used by COMPARE_AND_WRITE for the initial READ payload, even if the fabric is already providing a pre-allocated buffer for cmd->t_data_sg. Also, fix zero-length COMPARE_AND_WRITE handling within the compare_and_write_callback() and target_complete_ok_work() to queue the response, skipping the initial READ. This fixes COMPARE_AND_WRITE emulation with loopback, vhost, and xen-backend fabric drivers using SG_TO_MEM_NOALLOC. Reported-by: Christoph Hellwig <hch@lst.de> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2015-05-06 21:59:17 +02:00
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iscsi	Target/iscsi: Fix sendtargets response pdu for iser transport	2014-06-30 20:12:00 -07:00
configfs_macros.h	doc: fix broken references	2011-09-27 18:08:04 +02:00
target_core_backend.h	target: Report correct response length for some commands	2014-06-30 20:12:00 -07:00
target_core_base.h	target: Fix COMPARE_AND_WRITE with SG_TO_MEM_NOALLOC handling	2015-05-06 21:59:17 +02:00
target_core_configfs.h	target: Remove TF_CIT_TMPL macro	2013-10-16 13:35:02 -07:00
target_core_fabric.h	target: Add protection SGLs to target_submit_cmd_map_sgls	2014-01-18 09:58:09 +00:00
target_core_fabric_configfs.h	target: Add se_portal_group->tpg_auth_group	2013-07-03 19:44:31 -07:00