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[SCSI] target: Fix SCF_SCSI_CONTROL_SG_IO_CDB breakage

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This patch fixes a bug introduced during the v4 control CDB emulation
refactoring that broke SCF_SCSI_CONTROL_SG_IO_CDB operation within
transport_map_control_cmd_to_task().  It moves the BUG_ON() into
transport_do_se_mem_map() after the TRANSPORT(dev)->do_se_mem_map()
RAMDISK_DR special case, and adds the proper struct se_mem assignment
when !list_empty() for normal non RAMDISK_DR backend device cases.

Reported-by: Kai-Thorsten Hambrecht <kai@hambrecht.org>
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Nicholas Bellinger 2011-02-09 15:35:04 -08:00 committed by James Bottomley
parent 7c2bf6e925
commit e63af95888
1 changed files with 5 additions and 1 deletions
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6
drivers/target/target_core_transport.c
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@ -4827,6 +4827,8 @@ static int transport_do_se_mem_map(
return ret;
}
BUG_ON(list_empty(se_mem_list));
/*
* This is the normal path for all normal non BIDI and BIDI-COMMAND
* WRITE payloads.. If we need to do BIDI READ passthrough for
@ -5008,7 +5010,9 @@ transport_map_control_cmd_to_task(struct se_cmd *cmd)
struct se_mem *se_mem = NULL, *se_mem_lout = NULL;
u32 se_mem_cnt = 0, task_offset = 0;
BUG_ON(list_empty(cmd->t_task->t_mem_list));
if (!list_empty(T_TASK(cmd)->t_mem_list))
se_mem = list_entry(T_TASK(cmd)->t_mem_list->next,
struct se_mem, se_list);
ret = transport_do_se_mem_map(dev, task,
cmd->t_task->t_mem_list, NULL, se_mem,