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pm8001: clean bitmap management functions

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In the driver two different functions are used to free the same resource,
this patch makes the code easier to read. In addittion to that, some
minor optimisations were made too.

Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Acked-by: Suresh Thiagarajan <Suresh.Thiagarajan@pmcs.com>
Acked-by: Jack Wang <xjtuwjp@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Tomas Henzl
2014-07-09 17:20:40 +05:30
committed by Christoph Hellwig
parent 9f17609968
commit ef30054472
3 changed files with 12 additions and 30 deletions
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31
drivers/scsi/pm8001/pm8001_sas.c
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@@ -58,27 +58,16 @@ static int pm8001_find_tag(struct sas_task *task, u32 *tag)
}
/**
* pm8001_tag_clear - clear the tags bitmap
* pm8001_tag_free - free the no more needed tag
* @pm8001_ha: our hba struct
* @tag: the found tag associated with the task
*/
static void pm8001_tag_clear(struct pm8001_hba_info *pm8001_ha, u32 tag)
void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
{
void *bitmap = pm8001_ha->tags;
clear_bit(tag, bitmap);
}
void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
{
pm8001_tag_clear(pm8001_ha, tag);
}
static void pm8001_tag_set(struct pm8001_hba_info *pm8001_ha, u32 tag)
{
void *bitmap = pm8001_ha->tags;
set_bit(tag, bitmap);
}
/**
* pm8001_tag_alloc - allocate a empty tag for task used.
* @pm8001_ha: our hba struct
@@ -86,14 +75,13 @@ static void pm8001_tag_set(struct pm8001_hba_info *pm8001_ha, u32 tag)
*/
inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
{
unsigned int index, tag;
unsigned int tag;
void *bitmap = pm8001_ha->tags;
index = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
tag = index;
tag = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
if (tag >= pm8001_ha->tags_num)
return -SAS_QUEUE_FULL;
pm8001_tag_set(pm8001_ha, tag);
set_bit(tag, bitmap);
*tag_out = tag;
return 0;
}
@@ -102,7 +90,7 @@ void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha)
{
int i;
for (i = 0; i < pm8001_ha->tags_num; ++i)
pm8001_tag_clear(pm8001_ha, i);
pm8001_tag_free(pm8001_ha, i);
}
/**
@@ -501,11 +489,6 @@ int pm8001_queue_command(struct sas_task *task, const int num,
return pm8001_task_exec(task, num, gfp_flags, 0, NULL);
}
void pm8001_ccb_free(struct pm8001_hba_info *pm8001_ha, u32 ccb_idx)
{
pm8001_tag_clear(pm8001_ha, ccb_idx);
}
/**
* pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
* @pm8001_ha: our hba card information
@@ -542,7 +525,7 @@ void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
ccb->task = NULL;
ccb->ccb_tag = 0xFFFFFFFF;
ccb->open_retry = 0;
pm8001_ccb_free(pm8001_ha, ccb_idx);
pm8001_tag_free(pm8001_ha, ccb_idx);
}
/**