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scsi: lpfc: Remove reftag check in DIF paths 

When preparing protection DIF I/O for DMA, the driver obtains reference
tags from scsi_prot_ref_tag().  Previously, there was a wrong assumption
that an all 0xffffffff value meant error and thus the driver failed the
I/O.  This patch removes the evaluation code and accepts whatever the upper
layer returns.

Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Link: https://lore.kernel.org/r/20230803211932.155745-1-justintee8345@gmail.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Justin Tee 2023-08-03 14:19:32 -07:00 коммит произвёл Martin K. Petersen
Родитель b6d128f89a
Коммит 8eebf0e84f
1 изменённых файлов: 3 добавлений и 17 удалений
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20
drivers/scsi/lpfc/lpfc_scsi.c
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@ -109,8 +109,6 @@ lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
}
}
#define LPFC_INVALID_REFTAG ((u32)-1)
/**
* lpfc_rampdown_queue_depth - Post RAMP_DOWN_QUEUE event to worker thread
* @phba: The Hba for which this call is being executed.
@ -978,8 +976,6 @@ lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
sgpe = scsi_prot_sglist(sc);
lba = scsi_prot_ref_tag(sc);
if (lba == LPFC_INVALID_REFTAG)
return 0;
/* First check if we need to match the LBA */
if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
@ -1560,8 +1556,6 @@ lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
/* extract some info from the scsi command for pde*/
reftag = scsi_prot_ref_tag(sc);
if (reftag == LPFC_INVALID_REFTAG)
goto out;
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
@ -1723,8 +1717,6 @@ lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
/* extract some info from the scsi command */
blksize = scsi_prot_interval(sc);
reftag = scsi_prot_ref_tag(sc);
if (reftag == LPFC_INVALID_REFTAG)
goto out;
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
@ -1953,8 +1945,6 @@ lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
/* extract some info from the scsi command for pde*/
reftag = scsi_prot_ref_tag(sc);
if (reftag == LPFC_INVALID_REFTAG)
goto out;
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
@ -2154,8 +2144,6 @@ lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
/* extract some info from the scsi command */
blksize = scsi_prot_interval(sc);
reftag = scsi_prot_ref_tag(sc);
if (reftag == LPFC_INVALID_REFTAG)
goto out;
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
@ -2746,8 +2734,6 @@ lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
src = (struct scsi_dif_tuple *)sg_virt(sgpe);
start_ref_tag = scsi_prot_ref_tag(cmd);
if (start_ref_tag == LPFC_INVALID_REFTAG)
goto out;
start_app_tag = src->app_tag;
len = sgpe->length;
while (src && protsegcnt) {
@ -3493,11 +3479,11 @@ err:
scsi_cmnd->sc_data_direction);
lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
"9084 Cannot setup S/G List for HBA"
"IO segs %d/%d SGL %d SCSI %d: %d %d\n",
"9084 Cannot setup S/G List for HBA "
"IO segs %d/%d SGL %d SCSI %d: %d %d %d\n",
lpfc_cmd->seg_cnt, lpfc_cmd->prot_seg_cnt,
phba->cfg_total_seg_cnt, phba->cfg_sg_seg_cnt,
prot_group_type, num_sge);
prot_group_type, num_sge, ret);
lpfc_cmd->seg_cnt = 0;
lpfc_cmd->prot_seg_cnt = 0;