megaraid_sas fails after rtcwake

[Tommy Giesler]

It appears that in recent Kernel versions the megaraid_sas cannot properly handle suspend to RAM (rtcwake -m mem -s 30).

After the system wakes up, the megaraid_sas driver reports multiple errors and I/O to disks fails completely. A reset is required to make the machine work again.

----------------->%-----------------
Jan 20 08:54:23 Ubuntu-1804-bionic-64-minimal kernel: megaraid_sas 0000:18:00.0: Failed to register IRQ for vector 64.
Jan 20 08:54:23 Ubuntu-1804-bionic-64-minimal kernel: PM: dpm_run_callback(): pci_pm_resume+0x0/0xb0 returns -19
Jan 20 08:54:23 Ubuntu-1804-bionic-64-minimal kernel: PM: Device 0000:18:00.0 failed to resume async: error -19
-----------------%<-----------------

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-5.3.0-26-generic 5.3.0-26.28~18.04.1
ProcVersionSignature: Ubuntu 5.3.0-26.28~18.04.1-generic 5.3.13
Uname: Linux 5.3.0-26-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
Date: Mon Jan 20 09:03:49 2020
SourcePackage: linux-signed-hwe
UpgradeStatus: No upgrade log present (probably fresh install)

[Tommy Giesler (guardion)]

bug also present in 5.5.0-050500rc7-generic #202001192030

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Tommy Giesler (guardion)]

bug not present in 18.04 original kernel tree 4.15.0-74

[Terry Rudd (terrykrudd)]

Have you tested the latest 5.3.0-29 kernel to see if this is resolved

[Khaled El Mously (kmously)]

@Tommy Giesler: Could you please test with the latest kernels in -proposed to confirm that this bug isn't already resolved? Thanks

[Tommy Giesler (guardion)]

Sorry I was out of office until today. Please find the logs attached.

bug still present in 5.5.0-050500-generic #202001262030

[Tommy Giesler (guardion)]

latest kernel in proposed for bionic I could find: 5.3.0-28-generic #30~18.04.1-Ubuntu

bug still present.

[Tommy Giesler (guardion)]

I also tried 5.3.0-29 by downloading the eoan packages:
5.3.0-29-generic #31-Ubuntu SMP Fri Jan 17 17:27:26 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

[Tommy Giesler (guardion)]

The issue appears to be fixed in Mainline Kernel 5.6.6.

So far, I have not done further research, when this fix was implemented excatly. If needed, I can do further mainline or -rc tests.