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scsi: hisi_sas: Update all the registers after suspend and resume 

After suspend and resume, the HW registers will be set back to their
initial value. We use init_reg_v3_hw() to set some registers, but some
registers are set via firmware in ACPI "_RST" method, so add reset handler
before init_reg_v3_hw().

Link: https://lore.kernel.org/r/1567774537-20003-7-git-send-email-john.garry@huawei.com
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Xiang Chen 2019-09-06 20:55:30 +08:00 committed by Martin K. Petersen
parent b45e05aa5d
commit 73a4925d15
1 changed files with 8 additions and 2 deletions
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10
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
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@ -3283,15 +3283,21 @@ static int hisi_sas_v3_resume(struct pci_dev *pdev)
pci_enable_wake(pdev, PCI_D0, 0);
pci_restore_state(pdev);
rc = pci_enable_device(pdev);
if (rc)
if (rc) {
dev_err(dev, "enable device failed during resume (%d)\n", rc);
return rc;
}
pci_set_master(pdev);
scsi_unblock_requests(shost);
clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
sas_prep_resume_ha(sha);
init_reg_v3_hw(hisi_hba);
rc = hw_init_v3_hw(hisi_hba);
if (rc) {
scsi_remove_host(shost);
pci_disable_device(pdev);
}
hisi_hba->hw->phys_init(hisi_hba);
sas_resume_ha(sha);
clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);