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[SCSI] lpfc 8.1.7: Consolidate dma buf cleanup into a separate function 

Consolidate dma buf cleanup into a separate function

Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James Smart 2006-07-06 15:50:08 -04:00 committed by James Bottomley
parent 9279565046
commit bcf4dbfaf3
1 changed files with 24 additions and 16 deletions
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40
drivers/scsi/lpfc/lpfc_scsi.c
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@ -153,22 +153,6 @@ static void
lpfc_release_scsi_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
{
unsigned long iflag = 0;
/*
* There are only two special cases to consider. (1) the scsi command
* requested scatter-gather usage or (2) the scsi command allocated
* a request buffer, but did not request use_sg. There is a third
* case, but it does not require resource deallocation.
*/
if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
psb->seg_cnt, psb->pCmd->sc_data_direction);
} else {
if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
psb->pCmd->request_bufflen,
psb->pCmd->sc_data_direction);
}
}
spin_lock_irqsave(&phba->scsi_buf_list_lock, iflag);
psb->pCmd = NULL;
@ -281,6 +265,27 @@ lpfc_scsi_prep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * lpfc_cmd)
return 0;
}
static void
lpfc_scsi_unprep_dma_buf(struct lpfc_hba * phba, struct lpfc_scsi_buf * psb)
{
/*
* There are only two special cases to consider. (1) the scsi command
* requested scatter-gather usage or (2) the scsi command allocated
* a request buffer, but did not request use_sg. There is a third
* case, but it does not require resource deallocation.
*/
if ((psb->seg_cnt > 0) && (psb->pCmd->use_sg)) {
dma_unmap_sg(&phba->pcidev->dev, psb->pCmd->request_buffer,
psb->seg_cnt, psb->pCmd->sc_data_direction);
} else {
if ((psb->nonsg_phys) && (psb->pCmd->request_bufflen)) {
dma_unmap_single(&phba->pcidev->dev, psb->nonsg_phys,
psb->pCmd->request_bufflen,
psb->pCmd->sc_data_direction);
}
}
}
static void
lpfc_handle_fcp_err(struct lpfc_scsi_buf *lpfc_cmd)
{
@ -454,6 +459,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
cmd->scsi_done(cmd);
if (phba->cfg_poll & ENABLE_FCP_RING_POLLING) {
lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
lpfc_release_scsi_buf(phba, lpfc_cmd);
return;
}
@ -511,6 +517,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
}
}
lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
lpfc_release_scsi_buf(phba, lpfc_cmd);
}
@ -822,6 +829,7 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
return 0;
out_host_busy_free_buf:
lpfc_scsi_unprep_dma_buf(phba, lpfc_cmd);
lpfc_release_scsi_buf(phba, lpfc_cmd);
out_host_busy:
return SCSI_MLQUEUE_HOST_BUSY;