On 10/15/2021 2:43 PM, Jun Miao wrote:
Hi all
bug log:
* acpi device:1b: Cannot transition to power state D0 for parent in
D3hot*
When does this happen?
*
*
kernel version：
Linux intel-x86-64 5.15.0-rc4
device info:
root@intel-x86-64:~#lspci:
02:00.0 Non-Volatile memory controller: Intel Corporation SSD Pro
7600p/760p/E 6100p Series (rev 03)
root@intel-x86-64:~# lspci -vnn -s 02:00.0
02:00.0 Non-Volatile memory controller [0108]: Intel Corporation SSD
Pro 7600p/760p/E 6100p Series [8086:f1a6] (rev 03) (prog-if 02 [NVM
Express])
Subsystem: Intel Corporation Intel Corporation SSD Pro
7600p/760p/E 6100p Series [NVM Express] [8086:390b]
Flags: bus master, fast devsel, latency 0, IRQ 16, NUMA node 0,
IOMMU group 11
Memory at df000000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/8 Maskable+ 64bit+
Capabilities: [70] Express Endpoint, MSI 00
Capabilities: [b0] MSI-X: Enable+ Count=16 Masked-
Capabilities: [100] Advanced Error Reporting
Capabilities: [158] Secondary PCI Express
Capabilities: [178] Latency Tolerance Reporting
Capabilities: [180] L1 PM Substates
Kernel driver in use: nvme
kernel source :
drivers/acpi/device_pm.c
/ 197 if (!device->power.flags.ignore_parent && //
// 198 device->parent && (state <
device->parent->power.state)) { //
// 199 dev_warn(&device->dev, //
// 200 "Cannot transition to power state %s
for parent in %s\n",//
// 201 acpi_power_state_string(state), //
// 202 acpi_power_state_string(device->parent->power.state)); //
// 203 return -ENODEV; //
// 204 }
/
/
/
Whice one is this device(device:1b) parent device ???//
You can check which device is pointed to by the physical_node link in
/sys/bus/acpi/devices/.
Why do you think that NVMe is affected?
