NV50 fan runs at full speed after resume from suspend on kernels 5.1.8, 4.19.49

Submitted by Marc Meledandri

Assigned to Nouveau Project

Link to original bug (#110997)

Description

Created attachment 144635
vbios.rom

As of stable kernels 5.1.8 and 4.19.49, the GTX 260 fan runs at full speed after resuming from suspend.

This behavior regressed as of commit 342406e4fbba9a174125fbfe6aeac3d64ef90f76
drm/nouveau/i2c: Disable i2c bus access after ->fini()
https://lkml.org/lkml/2019/6/7/673

Reverting this single commit when building the respective stable kernels fixes the fan speed issue.

$ lspci -nn -d 10de:
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GT200 [GeForce GTX 260] [10de:05e2] (rev a1)

Discussion on Nouveau mailing list:
https://lists.freedesktop.org/archives/nouveau/2019-June/032620.html

Attachment 144635, "vbios.rom":
vbios.rom