From 996a02aeb959414378ea6c620934450944f8c5db Mon Sep 17 00:00:00 2001 From: James Smart Date: Tue, 21 May 2019 17:49:07 -0700 Subject: [PATCH] scsi: lpfc: Fix fcp_rsp_len checking on lun reset Issuing a LUN reset was resulting in a command failure which then escalated to a host reset. The FCP-4 spec allows fcp_rsp_len field to specify the number of valid bytes of FCP_RSP_INFO, and the value could be 4 or 8. The driver is allowing only a value of 8, thus it failed the command. Revise the driver to allow 4 or 8. Signed-off-by: Dick Kennedy Signed-off-by: James Smart Signed-off-by: Martin K. Petersen --- drivers/scsi/lpfc/lpfc_scsi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index 5a5a9bb..f9df800 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -4798,7 +4798,12 @@ lpfc_check_fcp_rsp(struct lpfc_vport *vport, struct lpfc_io_buf *lpfc_cmd) rsp_info, rsp_len, rsp_info_code); - if ((fcprsp->rspStatus2&RSP_LEN_VALID) && (rsp_len == 8)) { + /* If FCP_RSP_LEN_VALID bit is one, then the FCP_RSP_LEN + * field specifies the number of valid bytes of FCP_RSP_INFO. + * The FCP_RSP_LEN field shall be set to 0x04 or 0x08 + */ + if ((fcprsp->rspStatus2 & RSP_LEN_VALID) && + ((rsp_len == 8) || (rsp_len == 4))) { switch (rsp_info_code) { case RSP_NO_FAILURE: lpfc_printf_vlog(vport, KERN_INFO, LOG_FCP, -- 2.7.4