On Mon, 2014-06-16 at 15:30 -0400, bradley.grove@xxxxxxxxx wrote: > From: Bradley Grove <bgrove@xxxxxxxxxxxx> > > 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 patch also changes the value of pm8001_flags during resume to allow > completions to work. > > This fixes bug 76681: https://bugzilla.kernel.org/show_bug.cgi?id=76681 > > Signed-off-by: Bradley Grove <bgrove@xxxxxxxxxxxx> > --- > drivers/scsi/pm8001/pm8001_init.c | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/drivers/scsi/pm8001/pm8001_init.c b/drivers/scsi/pm8001/pm8001_init.c > index c4f31b21..9f51a1f 100644 > --- a/drivers/scsi/pm8001/pm8001_init.c > +++ b/drivers/scsi/pm8001/pm8001_init.c > @@ -957,6 +957,7 @@ 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) { > @@ -1026,7 +1027,7 @@ 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); > @@ -1058,7 +1059,12 @@ 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); > } > + pm8001_ha->flags = PM8001F_INIT_TIME; > scsi_unblock_requests(pm8001_ha->shost); > + pm8001_scan_start(pm8001_ha->shost); > + msleep(100); What's the reason for the 0.1s sleep? Something tells me it's to try to ensure that all the work kicked off by the scan start is completed in which case a sleep seems to be a bit racy. James > + sas_resume_ha(sha); > + pm8001_ha->flags = PM8001F_RUN_TIME; > return 0; > > err_out_disable: -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
