At 2021-05-14 22:05:06, "Rafael J. Wysocki" <rafael@xxxxxxxxxx> wrote:
>On Fri, Apr 30, 2021 at 2:43 PM Shujun Wang <wsj20369@xxxxxxx> wrote:
>>
>> This reverts commit 7e4fdeafa61f2b653fcf9678f09935e55756aed2.
>> It may cause some NVMe device probes to fail, and the system may get
>> stuck when using an NVMe device as the root filesystem.
>>
>> In the function nvme_pci_enable(struct nvme_dev *dev), as shown below,
>> readl(NVME_REG_CSTS) always returns -1 with the commit, which results in
>> the probe failed.
>>
>> if (readl(dev->bar + NVME_REG_CSTS) == -1) {
>> result = -ENODEV;
>> goto disable;
>> }
>>
>> dmesg:
>> [ 1.106280] nvme 0000:04:00.0: platform quirk: setting simple suspend
>> [ 1.109111] nvme nvme0: pci function 0000:04:00.0
>> [ 1.113066] nvme 0000:04:00.0: enabling device (0000 -> 0002)
>> [ 1.121040] nvme nvme0: Removing after probe failure status: -19
>>
>> lspci:
>> Non-Volatile memory controller: KIOXIA Corporation Device 0001
>>
>> device uevent:
>> DRIVER=nvme
>> PCI_CLASS=10802
>> PCI_ID=1E0F:0001
>> PCI_SUBSYS_ID=1E0F:0001
>> PCI_SLOT_NAME=0000:04:00.0
>> MODALIAS=pci:v00001E0Fd00000001sv00001E0Fsd00000001bc01sc08i02
>>
>> This patch was tested in Lenovo Thinkpad X1.
>
>Please send me the dmidecode output from this machine or (better)
>attach it at https://bugzilla.kernel.org/show_bug.cgi?id=213019
>
>Thanks!
Hi Rafael:
Sorry for late, I have attached the acpidump and dmidecode in the https://bugzilla.kernel.org/show_bug.cgi?id=213019
BR
Shujun Wang
