[SCSI] lpfc 8.3.22: Add support for PCI Adapter Failure

Periodically poll adapter registers to detect pci adapter failure
(reads return -1). On failure, take port offline, set error indicators
and wake up worker threads. Threads will take adapter offline.

Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 13 insertions, 3 deletions

diff --git a/drivers/scsi/lpfc/lpfc_bsg.c b/drivers/scsi/lpfc/lpfc_bsg.c
index 5a4a2f36ae6..d9b91b3f942 100644
--- a/drivers/scsi/lpfc/lpfc_bsg.c
+++ b/drivers/scsi/lpfc/lpfc_bsg.c
@@ -348,7 +348,10 @@ lpfc_bsg_send_mgmt_cmd(struct fc_bsg_job *job)
         dd_data->context_un.iocb.bmp = bmp;
 
         if (phba->cfg_poll & DISABLE_FCP_RING_INT) {
-                creg_val = readl(phba->HCregaddr);
+                if (lpfc_readl(phba->HCregaddr, &creg_val)) {
+                        rc = -EIO ;
+                        goto free_cmdiocbq;
+                }
                 creg_val |= (HC_R0INT_ENA << LPFC_FCP_RING);
                 writel(creg_val, phba->HCregaddr);
                 readl(phba->HCregaddr); /* flush */
@@ -599,7 +602,10 @@ lpfc_bsg_rport_els(struct fc_bsg_job *job)
         dd_data->context_un.iocb.ndlp = ndlp;
 
         if (phba->cfg_poll & DISABLE_FCP_RING_INT) {
-                creg_val = readl(phba->HCregaddr);
+                if (lpfc_readl(phba->HCregaddr, &creg_val)) {
+                        rc = -EIO;
+                        goto linkdown_err;
+                }
                 creg_val |= (HC_R0INT_ENA << LPFC_FCP_RING);
                 writel(creg_val, phba->HCregaddr);
                 readl(phba->HCregaddr); /* flush */
@@ -613,6 +619,7 @@ lpfc_bsg_rport_els(struct fc_bsg_job *job)
         else
                 rc = -EIO;
 
+linkdown_err:
         pci_unmap_sg(phba->pcidev, job->request_payload.sg_list,
                      job->request_payload.sg_cnt, DMA_TO_DEVICE);
         pci_unmap_sg(phba->pcidev, job->reply_payload.sg_list,
@@ -1357,7 +1364,10 @@ lpfc_issue_ct_rsp(struct lpfc_hba *phba, struct fc_bsg_job *job, uint32_t tag,
         dd_data->context_un.iocb.ndlp = ndlp;
 
         if (phba->cfg_poll & DISABLE_FCP_RING_INT) {
-                creg_val = readl(phba->HCregaddr);
+                if (lpfc_readl(phba->HCregaddr, &creg_val)) {
+                        rc = -IOCB_ERROR;
+                        goto issue_ct_rsp_exit;
+                }
                 creg_val |= (HC_R0INT_ENA << LPFC_FCP_RING);
                 writel(creg_val, phba->HCregaddr);
                 readl(phba->HCregaddr); /* flush */