Bug 216400

Summary:	Firmware activation starting AEN processing prevents further AER commands sent to the NVMe controller.
Product:	IO/Storage	Reporter:	lixingyuan (lixingyuan)
Component:	NVMe	Assignee:	IO/NVME Virtual Default Assignee (io_nvme)
Status:	NEW ---
Severity:	high
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	v5.19	Subsystem:
Regression:	No	Bisected commit-id:

Description lixingyuan 2022-08-23 01:14:50 UTC

This bug is related to these two commits:


1. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.0-rc2&id=4c75f877853cfa81b12374a07208e07b077f39b8

These codes will set the controller state to NVME_CTRL_RESETTING while handling the firmware activation staring AEN

2. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.0-rc2&id=0fa0f99fc84e41057cbdd2efbfe91c6b2f47dd9d

When submitting a new AER command to the controller, this code checks if the controller state is NVME_CTRL_LIVE. This caused the problem. When the firmware activation staring AEN was processed before, the controller state was already set to NVME_CTRL_RESETTING, which resulted in no new AER commands being sent to the controller.