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SubjectRe: [PATCH kernel] commit 4fbdf9cb ("lpfc: Fix for lun discovery issue with saturn adapter.")
Reviewed-By: James Smart <james.smart@emulex.com>


Alexey, Sebastian,

Yes - this section needs to be reverted. This patch is good.

-- james s




On 4/28/2015 4:26 AM, Alexey Kardashevskiy wrote:
> This reverts 4fbdf9cb is breaks LPFC on POWER7 machine, big endian kernel.
>
> This is the hardware used for verification:
> 0005:01:00.0 Fibre Channel [0c04]: Emulex Corporation Saturn-X: LightPulse Fibre Channel Host Adapter [10df:f100] (rev 03)
> 0005:01:00.1 Fibre Channel [0c04]: Emulex Corporation Saturn-X: LightPulse Fibre Channel Host Adapter [10df:f100] (rev 03)
>
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> ---
> drivers/scsi/lpfc/lpfc_scsi.c | 41 +++++++++++++++++++++--------------------
> 1 file changed, 21 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
> index cb73cf9..c140f99 100644
> --- a/drivers/scsi/lpfc/lpfc_scsi.c
> +++ b/drivers/scsi/lpfc/lpfc_scsi.c
> @@ -1130,25 +1130,6 @@ lpfc_release_scsi_buf(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb)
> }
>
> /**
> - * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
> - * @data: A pointer to the immediate command data portion of the IOCB.
> - * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
> - *
> - * The routine copies the entire FCP command from @fcp_cmnd to @data while
> - * byte swapping the data to big endian format for transmission on the wire.
> - **/
> -static void
> -lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
> -{
> - int i, j;
> -
> - for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
> - i += sizeof(uint32_t), j++) {
> - ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
> - }
> -}
> -
> -/**
> * lpfc_scsi_prep_dma_buf_s3 - DMA mapping for scsi buffer to SLI3 IF spec
> * @phba: The Hba for which this call is being executed.
> * @lpfc_cmd: The scsi buffer which is going to be mapped.
> @@ -1283,7 +1264,6 @@ lpfc_scsi_prep_dma_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
> * we need to set word 4 of IOCB here
> */
> iocb_cmd->un.fcpi.fcpi_parm = scsi_bufflen(scsi_cmnd);
> - lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
> return 0;
> }
>
> @@ -4147,6 +4127,24 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
> }
>
> /**
> + * lpfc_fcpcmd_to_iocb - copy the fcp_cmd data into the IOCB
> + * @data: A pointer to the immediate command data portion of the IOCB.
> + * @fcp_cmnd: The FCP Command that is provided by the SCSI layer.
> + *
> + * The routine copies the entire FCP command from @fcp_cmnd to @data while
> + * byte swapping the data to big endian format for transmission on the wire.
> + **/
> +static void
> +lpfc_fcpcmd_to_iocb(uint8_t *data, struct fcp_cmnd *fcp_cmnd)
> +{
> + int i, j;
> + for (i = 0, j = 0; i < sizeof(struct fcp_cmnd);
> + i += sizeof(uint32_t), j++) {
> + ((uint32_t *)data)[j] = cpu_to_be32(((uint32_t *)fcp_cmnd)[j]);
> + }
> +}
> +
> +/**
> * lpfc_scsi_prep_cmnd - Wrapper func for convert scsi cmnd to FCP info unit
> * @vport: The virtual port for which this call is being executed.
> * @lpfc_cmd: The scsi command which needs to send.
> @@ -4225,6 +4223,9 @@ lpfc_scsi_prep_cmnd(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
> fcp_cmnd->fcpCntl3 = 0;
> phba->fc4ControlRequests++;
> }
> + if (phba->sli_rev == 3 &&
> + !(phba->sli3_options & LPFC_SLI3_BG_ENABLED))
> + lpfc_fcpcmd_to_iocb(iocb_cmd->unsli3.fcp_ext.icd, fcp_cmnd);
> /*
> * Finish initializing those IOCB fields that are independent
> * of the scsi_cmnd request_buffer



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