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target: Fix BIDI t_task_cdb handling in transport_generic_new_cmd 

This patch fixes a bug for BIDI handling in transport_generic_new_cmd() where
cmd->t_task_cdbs_left and Co. where not taking into account the extra
task count generated during the first call to transport_allocate_data_tasks().

Cc: Christoph Hellwig <hch@lst.de>
Cc: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2011-10-22 04:06:23 -07:00
parent 38b400676b
commit 9ac549873d
1 changed files with 9 additions and 9 deletions
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18
drivers/target/target_core_transport.c
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@ -3934,7 +3934,7 @@ transport_allocate_control_task(struct se_cmd *cmd)
int transport_generic_new_cmd(struct se_cmd *cmd)
{
struct se_device *dev = cmd->se_dev;
int task_cdbs;
int task_cdbs, task_cdbs_bidi = 0;
int set_counts = 1;
int ret = 0;
@ -3957,9 +3957,10 @@ int transport_generic_new_cmd(struct se_cmd *cmd)
dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
BUG_ON(!(cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB));
ret = transport_allocate_data_tasks(cmd, DMA_FROM_DEVICE,
cmd->t_bidi_data_sg, cmd->t_bidi_data_nents);
if (ret <= 0)
task_cdbs_bidi = transport_allocate_data_tasks(cmd,
DMA_FROM_DEVICE, cmd->t_bidi_data_sg,
cmd->t_bidi_data_nents);
if (task_cdbs_bidi <= 0)
goto out_fail;
atomic_inc(&cmd->t_fe_count);
@ -3983,11 +3984,10 @@ int transport_generic_new_cmd(struct se_cmd *cmd)
atomic_inc(&cmd->t_se_count);
}
cmd->t_task_list_num = task_cdbs;
atomic_set(&cmd->t_task_cdbs_left, task_cdbs);
atomic_set(&cmd->t_task_cdbs_ex_left, task_cdbs);
atomic_set(&cmd->t_task_cdbs_timeout_left, task_cdbs);
cmd->t_task_list_num = (task_cdbs + task_cdbs_bidi);
atomic_set(&cmd->t_task_cdbs_left, cmd->t_task_list_num);
atomic_set(&cmd->t_task_cdbs_ex_left, cmd->t_task_list_num);
atomic_set(&cmd->t_task_cdbs_timeout_left, cmd->t_task_list_num);
/*
* For WRITEs, let the fabric know its buffer is ready..