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Date: Fri, 8 Mar 2024 09:15:45 +0300
From: Alexey Dobriyan <adobriyan@gmail.com>
To: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>
Cc: stfrench@microsoft.com,
	Linux List Kernel Mailing <linux-kernel@vger.kernel.org>
Subject: Re: regression/bisected/6.8 commit
 5d390df3bdd13d178eb2e02e60e9a480f7103f7b prevents the system going into
 suspend mode
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On Fri, Mar 08, 2024 at 02:22:03AM +0500, Mikhail Gavrilov wrote:
> on one of my systems, commit 5d390df3bdd13d178eb2e02e60e9a480f7103f7b
> prevents the system going into suspend mode.

> Every time when I tried switch to suspend mode I saw this messages in the log:
> [  117.596548] xhci_hcd 0000:12:00.3: PM: pci_pm_suspend():
> hcd_pci_suspend+0x0/0x20 returns -16
> [  117.596569] xhci_hcd 0000:12:00.3: PM: dpm_run_callback():
> pci_pm_suspend+0x0/0x4e0 returns -16
> [  117.596583] xhci_hcd 0000:12:00.3: PM: failed to suspend async: error -16
> [  118.295894] PM: Some devices failed to suspend, or early wake event detected
> [  118.301032] xhci_hcd 0000:10:00.0: xHC error in resume, USBSTS 0x401, Reinit
> [  118.301129] usb usb1: root hub lost power or was reset
> [  118.301132] usb usb2: root hub lost power or was reset
> [  118.301868] [drm] PCIE GART of 512M enabled (table at 0x0000008000300000).
> [  118.302115] [drm] PSP is resuming...
> [  118.336045] [drm] reserve 0x1300000 from 0x85fc000000 for PSP TMR
> [  118.374741] xone-dongle 3-1.1:1.0: xone_mt76_resume_radio: resumed
> [  118.377527] nvme nvme0: 31/0/0 default/read/poll queues
> [  118.379470] nvme nvme1: 32/0/0 default/read/poll queues
> [  118.493231] amdgpu 0000:03:00.0: amdgpu: RAP: optional rap ta ucode
> is not available
> [  118.493237] amdgpu 0000:03:00.0: amdgpu: SECUREDISPLAY:
> securedisplay ta ucode is not available
> [  118.493241] amdgpu 0000:03:00.0: amdgpu: SMU is resuming...
> [  118.493245] amdgpu 0000:03:00.0: amdgpu: smu driver if version =
> 0x0000003d, smu fw if version = 0x0000003f, smu fw program = 0, smu fw
> version = 0x004e7900 (78.121.0)
> [  118.493248] amdgpu 0000:03:00.0: amdgpu: SMU driver if version not matched
> [  118.609941] ata3: SATA link down (SStatus 0 SControl 300)
> [  118.610052] ata4: SATA link down (SStatus 0 SControl 300)
> [  118.610154] ata2: SATA link down (SStatus 0 SControl 300)
> [  118.610174] ata1: SATA link down (SStatus 0 SControl 300)
> [  118.690018] usb 1-12: reset high-speed USB device number 4 using xhci_hcd
> [  119.067818] usb 1-10: reset high-speed USB device number 3 using xhci_hcd
> [  119.442726] usb 1-6: reset full-speed USB device number 2 using xhci_hcd
> [  122.034768] amdgpu 0000:03:00.0: amdgpu: SMU: I'm not done with
> your previous command: SMN_C2PMSG_66:0x00000006
> SMN_C2PMSG_82:0x00000000
> [  122.034779] amdgpu 0000:03:00.0: amdgpu: Failed to enable requested
> dpm features!
> [  122.034780] amdgpu 0000:03:00.0: amdgpu: Failed to setup smc hw!
> [  122.034782] [drm:amdgpu_device_ip_resume_phase2 [amdgpu]] *ERROR*
> resume of IP block <smu> failed -62
> [  122.034975] amdgpu 0000:03:00.0: amdgpu: amdgpu_device_ip_resume
> failed (-62).
> [  122.034984] amdgpu 0000:03:00.0: PM: dpm_run_callback():
> pci_pm_resume+0x0/0x200 returns -62
> [  122.034990] amdgpu 0000:03:00.0: PM: failed to resume async: error -62
> [  122.042111] OOM killer enabled.
> [  122.042115] Restarting tasks ... done.
> 
> So I tried to find which commit borked it.
> And I successfully found it:
> 
> 5d390df3bdd13d178eb2e02e60e9a480f7103f7b is the first bad commit
> commit 5d390df3bdd13d178eb2e02e60e9a480f7103f7b
> Author: Alexey Dobriyan <adobriyan@gmail.com>
> Date:   Tue Jan 23 13:40:00 2024 +0300
> 
>     smb: client: delete "true", "false" defines
> 
>     Kernel has its own official true/false definitions.
> 
>     The defines aren't even used in this file.
> 
>     Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
>     Signed-off-by: Steve French <stfrench@microsoft.com>
> 
>  fs/smb/client/smbencrypt.c | 7 -------
>  1 file changed, 7 deletions(-)
> 
> I am convinced that suspend mode started work after reverting commit
> 5d390df3bdd13d178eb2e02e60e9a480f7103f7b on top of 6.8-rc7.
> 
> Bisect log and all kernel logs from each step I attached here.
> Also attached build config.
> 
> Alexey, can you look into it?

What? Deleting unused defines breaks suspend?

Collect fs/smb/client/smbencrypt.o with and without patch and
see them being identical.

Enum in stddef.h are

	enum {
		false = 0,
		true = 1,
	};

so if defines were used somehow they would expand to same values of
same type.

Something else is going on.