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scsi: hisi_sas: Add check for methods _PS0 and _PR0

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To support system suspend/resume or runtime suspend/resume, need to use the
function pci_set_power_state() to change the power state which requires at
least method _PS0 or _PR0 be filled by platform for v3 hw. So check whether
the method is supported, if not, print a warning.

A Kconfig dependency is added as there is no stub for
acpi_device_power_manageable().

Link: https://lore.kernel.org/r/1601649038-25534-5-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 2020-10-02 22:30:35 +08:00 committed by Martin K. Petersen
parent 65ff4aef7e
commit e06596d500
2 changed files with 5 additions and 0 deletions
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1
drivers/scsi/hisi_sas/Kconfig
View File

@ -15,5 +15,6 @@ config SCSI_HISI_SAS_PCI
tristate "HiSilicon SAS on PCI bus"
depends on SCSI_HISI_SAS
depends on PCI
depends on ACPI
help
This driver supports HiSilicon's SAS HBA based on PCI device

4
drivers/scsi/hisi_sas/hisi_sas_v3_hw.c
View File

@ -903,6 +903,7 @@ static int reset_hw_v3_hw(struct hisi_hba *hisi_hba)
static int hw_init_v3_hw(struct hisi_hba *hisi_hba)
{
struct device *dev = hisi_hba->dev;
struct acpi_device *acpi_dev;
union acpi_object *obj;
guid_t guid;
int rc;
@ -933,6 +934,9 @@ static int hw_init_v3_hw(struct hisi_hba *hisi_hba)
else
ACPI_FREE(obj);
acpi_dev = ACPI_COMPANION(dev);
if (!acpi_device_power_manageable(acpi_dev))
dev_notice(dev, "neither _PS0 nor _PR0 is defined\n");
return 0;
}