On 5/10/2017 8:58 PM, Rafael J. Wysocki wrote: >> When GED driver makes an AML call and the driver on the right side of the picture >> is not present, GED driver gets an ACPI error return code. > This means that _EVT evaluation failed, right? > > How does the _EVT in question look like? What does make it depend on the > other drivers to be present in particular? This one was trying to use an I2C Operating Region. The QUP I2C driver was not loaded yet. Since the I2C namespace handler was not registered, ACPI returned an error. [ 5.061989] ACPI Error: Result stack is empty! State=ffffe021fd9eac00 (20160930/dswstate-99)^M [ 5.061992] ACPI Error: Method parse/execution failed [\_SB.I1C2.ARBT.LCK] (Node ffffe0213c154988), AE_NOT_EXIST (20160930/psparse-543)^M [ 5.061998] ACPI Error: Method parse/execution failed [\_SB.I1C2.PDV0.GETI] (Node ffffe0213c154410), AE_NOT_EXIST (20160930/psparse-543)^M [ 5.062003] ACPI Error: Method parse/execution failed [\_SB.PHP0.GETI] (Node ffffe0213c135118), AE_NOT_EXIST (20160930/psparse-543)^M [ 5.062009] ACPI Error: Method parse/execution failed [\_SB.PHP0.PVNH] (Node ffffe0213c135dc0), AE_NOT_EXIST (20160930/psparse-543)^M [ 5.062013] ACPI Error: Method parse/execution failed [\_SB.PCI0.PEVN] (Node ffffe0213c133910), AE_NOT_EXIST (20160930/psparse-543)^M [ 5.062017] ACPI Error: Method parse/execution failed [\_SB.GED1.PCIM] (Node ffffe0213c121398), AE_NOT_EXIST (20160930/psparse-543)^M [ 5.062022] ACPI Error: Method parse/execution failed [\_SB.GED1._EVT] (Node ffffe0213c1217d0), AE_NOT_EXIST (20160930/psparse-543)^M -- Sinan Kaya Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
