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target: remove transport_allocate_tasks

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There were only two callers, and one of them always wants the call
to transport_allocate_data_tasks anyway.  Also drop the constant
lba argument to transport_allocate_data_tasks and move the variables
inside it into the minimum required scope.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Christoph Hellwig 2011-10-18 06:57:02 -04:00 committed by Nicholas Bellinger
parent da0f761991
commit 38b400676b
1 changed files with 32 additions and 49 deletions
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81
drivers/target/target_core_transport.c
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@ -3808,29 +3808,34 @@ EXPORT_SYMBOL(transport_do_task_sg_chain);
/*
* Break up cmd into chunks transport can handle
*/
static int transport_allocate_data_tasks(
struct se_cmd *cmd,
unsigned long long lba,
static int
transport_allocate_data_tasks(struct se_cmd *cmd,
enum dma_data_direction data_direction,
struct scatterlist *sgl,
unsigned int sgl_nents)
struct scatterlist *cmd_sg, unsigned int sgl_nents)
{
struct se_task *task;
struct se_device *dev = cmd->se_dev;
unsigned long flags;
int task_count, i;
sector_t sectors, dev_max_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors;
u32 sector_size = dev->se_sub_dev->se_dev_attrib.block_size;
struct scatterlist *sg;
struct scatterlist *cmd_sg;
unsigned long long lba;
sector_t sectors, dev_max_sectors;
u32 sector_size;
if (transport_cmd_get_valid_sectors(cmd) < 0)
return -EINVAL;
dev_max_sectors = dev->se_sub_dev->se_dev_attrib.max_sectors;
sector_size = dev->se_sub_dev->se_dev_attrib.block_size;
WARN_ON(cmd->data_length % sector_size);
lba = cmd->t_task_lba;
sectors = DIV_ROUND_UP(cmd->data_length, sector_size);
task_count = DIV_ROUND_UP_SECTOR_T(sectors, dev_max_sectors);
cmd_sg = sgl;
for (i = 0; i < task_count; i++) {
struct se_task *task;
unsigned int task_size, task_sg_nents_padded;
struct scatterlist *sg;
unsigned long flags;
int count;
task = transport_generic_get_task(cmd, data_direction);
@ -3921,25 +3926,6 @@ transport_allocate_control_task(struct se_cmd *cmd)
return 1;
}
static u32 transport_allocate_tasks(
struct se_cmd *cmd,
unsigned long long lba,
enum dma_data_direction data_direction,
struct scatterlist *sgl,
unsigned int sgl_nents)
{
if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) {
if (transport_cmd_get_valid_sectors(cmd) < 0)
return -EINVAL;
return transport_allocate_data_tasks(cmd, lba, data_direction,
sgl, sgl_nents);
} else
return transport_allocate_control_task(cmd);
}
/*
* Allocate any required ressources to execute the command, and either place
* it on the execution queue if possible. For writes we might not have the
@ -3965,17 +3951,14 @@ int transport_generic_new_cmd(struct se_cmd *cmd)
}
/*
* Setup any BIDI READ tasks and memory from
* cmd->t_mem_bidi_list so the READ struct se_tasks
* are queued first for the non pSCSI passthrough case.
* For BIDI command set up the read tasks first.
*/
if (cmd->t_bidi_data_sg &&
(dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV)) {
ret = transport_allocate_tasks(cmd,
cmd->t_task_lba,
DMA_FROM_DEVICE,
cmd->t_bidi_data_sg,
cmd->t_bidi_data_nents);
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)
goto out_fail;
@ -3983,15 +3966,15 @@ int transport_generic_new_cmd(struct se_cmd *cmd)
atomic_inc(&cmd->t_se_count);
set_counts = 0;
}
/*
* Setup the tasks and memory from cmd->t_mem_list
* Note for BIDI transfers this will contain the WRITE payload
*/
task_cdbs = transport_allocate_tasks(cmd,
cmd->t_task_lba,
cmd->data_direction,
cmd->t_data_sg,
cmd->t_data_nents);
if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) {
task_cdbs = transport_allocate_data_tasks(cmd,
cmd->data_direction, cmd->t_data_sg,
cmd->t_data_nents);
} else {
task_cdbs = transport_allocate_control_task(cmd);
}
if (task_cdbs <= 0)
goto out_fail;