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pm8001: Fix hibernation issue 

During hibernation, the HBA firmware may lose power and forget the device
id info.   This causes the HBA to reject IO upon resume.   The fix is
to call the libsas power management routines to make the domain device
forgetful.

This fixes bug 76681: https://bugzilla.kernel.org/show_bug.cgi?id=76681

Signed-off-by: Bradley Grove <bgrove@attotech.com>
Acked-by: Jack Wang <xjtuwjp@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Bradley Grove 2014-07-09 17:20:23 +05:30 committed by Christoph Hellwig
parent 4dc06fd846
commit 9f17609968
1 changed files with 10 additions and 2 deletions
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12
drivers/scsi/pm8001/pm8001_init.c
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@ -964,6 +964,7 @@ static int pm8001_pci_suspend(struct pci_dev *pdev, pm_message_t state)
int i, j;
u32 device_state;
pm8001_ha = sha->lldd_ha;
sas_suspend_ha(sha);
flush_workqueue(pm8001_wq);
scsi_block_requests(pm8001_ha->shost);
if (!pdev->pm_cap) {
@ -1013,6 +1014,7 @@ static int pm8001_pci_resume(struct pci_dev *pdev)
int rc;
u8 i = 0, j;
u32 device_state;
DECLARE_COMPLETION_ONSTACK(completion);
pm8001_ha = sha->lldd_ha;
device_state = pdev->current_state;
@ -1033,7 +1035,7 @@ static int pm8001_pci_resume(struct pci_dev *pdev)
rc = pci_go_44(pdev);
if (rc)
goto err_out_disable;
sas_prep_resume_ha(sha);
/* chip soft rst only for spc */
if (pm8001_ha->chip_id == chip_8001) {
PM8001_CHIP_DISP->chip_soft_rst(pm8001_ha);
@ -1065,7 +1067,13 @@ static int pm8001_pci_resume(struct pci_dev *pdev)
for (i = 1; i < pm8001_ha->number_of_intr; i++)
PM8001_CHIP_DISP->interrupt_enable(pm8001_ha, i);
}
scsi_unblock_requests(pm8001_ha->shost);
pm8001_ha->flags = PM8001F_RUN_TIME;
for (i = 0; i < pm8001_ha->chip->n_phy; i++) {
pm8001_ha->phy[i].enable_completion = &completion;
PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
wait_for_completion(&completion);
}
sas_resume_ha(sha);
return 0;
err_out_disable: