Commit 1e954d1f authored by Luo Jiaxing's avatar Luo Jiaxing Committed by Martin K. Petersen
Browse files

scsi: hisi_sas: Modify the commit information for DSM method 

Make it clear that BIOS may modify some register settings.

Link: https://lore.kernel.org/r/1589552025-165012-3-git-send-email-john.garry@huawei.com


Signed-off-by: default avatarLuo Jiaxing <luojiaxing@huawei.com>
Signed-off-by: default avatarJohn Garry <john.garry@huawei.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent e16b9ed6

drivers/scsi/hisi_sas/hisi_sas_v3_hw.c

+6 −2
Original line number Diff line number Diff line
@@ -912,11 +912,15 @@ static int hw_init_v3_hw(struct hisi_hba *hisi_hba) 
		return -EINVAL;

	}



	/* Switch over to MSI handling , from PCI AER default */

	/*

	 * This DSM handles some hardware-related configurations:

	 * 1. Switch over to MSI error handling in kernel

	 * 2. BIOS *may* reset some register values through this method

	 */

	obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &guid, 0,

				DSM_FUNC_ERR_HANDLE_MSI, NULL);

	if (!obj)

		dev_warn(dev, "Switch over to MSI handling failed\n");

		dev_warn(dev, "can not find DSM method, ignore\n");

	else

		ACPI_FREE(obj);