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scsi: cxlflash: Remove unnecessary DMA mapping
Devices supported by the cxlflash driver are fully coherent and do not require a bus address mapping. Avoid unnecessary path length by using the virtual address and length already present in the scatter-gather entry. Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com> Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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parent
323e33428e
commit
50b787f723
1 changed files with 2 additions and 13 deletions
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@ -176,7 +176,6 @@ static void cmd_complete(struct afu_cmd *cmd)
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dev_dbg_ratelimited(dev, "%s:scp=%p result=%08x ioasc=%08x\n",
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__func__, scp, scp->result, cmd->sa.ioasc);
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scsi_dma_unmap(scp);
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scp->scsi_done(scp);
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if (cmd_is_tmf) {
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@ -445,7 +444,6 @@ static int cxlflash_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scp)
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struct scatterlist *sg = scsi_sglist(scp);
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u16 req_flags = SISL_REQ_FLAGS_SUP_UNDERRUN;
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ulong lock_flags;
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int nseg = 0;
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int rc = 0;
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dev_dbg_ratelimited(dev, "%s: (scp=%p) %d/%d/%d/%llu "
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@ -487,15 +485,8 @@ static int cxlflash_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scp)
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}
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if (likely(sg)) {
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nseg = scsi_dma_map(scp);
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if (unlikely(nseg < 0)) {
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dev_err(dev, "%s: Fail DMA map\n", __func__);
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rc = SCSI_MLQUEUE_HOST_BUSY;
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goto out;
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}
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cmd->rcb.data_len = sg_dma_len(sg);
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cmd->rcb.data_ea = sg_dma_address(sg);
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cmd->rcb.data_len = sg->length;
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cmd->rcb.data_ea = (uintptr_t)sg_virt(sg);
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}
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cmd->scp = scp;
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@ -513,8 +504,6 @@ static int cxlflash_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scp)
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memcpy(cmd->rcb.cdb, scp->cmnd, sizeof(cmd->rcb.cdb));
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rc = afu->send_cmd(afu, cmd);
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if (unlikely(rc))
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scsi_dma_unmap(scp);
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out:
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return rc;
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}
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