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scsi: hisi_sas: Add check for methods _PS0 and _PR0 

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" tristate "HiSilicon SAS on PCI bus"
depends on SCSI_HISI_SAS depends on SCSI_HISI_SAS
depends on PCI depends on PCI
depends on ACPI
help help
This driver supports HiSilicon's SAS HBA based on PCI device 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) static int hw_init_v3_hw(struct hisi_hba *hisi_hba)
{ {
struct device *dev = hisi_hba->dev; struct device *dev = hisi_hba->dev;
struct acpi_device *acpi_dev;
union acpi_object *obj; union acpi_object *obj;
guid_t guid; guid_t guid;
int rc; int rc;
@ -933,6 +934,9 @@ static int hw_init_v3_hw(struct hisi_hba *hisi_hba)
else else
ACPI_FREE(obj); 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; return 0;
} }