** Also affects: linux (Ubuntu Disco)
Importance: Undecided
Assignee: dann frazier (dannf)
Status: In Progress
** Changed in: linux (Ubuntu Disco)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1819500
Title:
hisi_sas: add debugfs support
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Disco:
Fix Committed
Bug description:
[Impact]
Per https://patchwork.kernel.org/cover/10737541/ :
"Every controller HW version has had bugs. These bugs have been very
painful to debug. One useful tool to debug these is being able to capture
and export HW registers and driver control structures at point of failure."
[Test Case]
echo "options hisi_sas_main debugfs_enable=1" | \
sudo tee /etc/modprobe.d/hisi-sas-debugfs.conf
sudo mkinitramfs -o /boot/initrd.img-$(uname -r) $(uname -r)
sudo reboot
[...]
test -d /sys/kernel/debug/hisi_sas
[Fix]
5979f33b982dc scsi: hisi_sas: Add debugfs ITCT file and add file operations
5b0eeac4bed4b scsi: hisi_sas: Fix type casting and missing static qualifier
in debugfs code
c2c7e74057715 scsi: hisi_sas: No need to check return value of debugfs_create
functions
1afb4b8524797 scsi: hisi_sas: Add debugfs IOST file and add file operations
148e379f60c5c scsi: hisi_sas: Add debugfs DQ file and add file operations
971afae7cf4f7 scsi: hisi_sas: Add debugfs CQ file and add file operations
61a6ebf3f5842 scsi: hisi_sas: Add debugfs for port registers
caefac1996764 scsi: hisi_sas: Debugfs global register create file and add
file operations
49159a5e4175f scsi: hisi_sas: Take debugfs snapshot for all regs
eb1c2b72b7694 scsi: hisi_sas: Alloc debugfs snapshot buffer memory for all
registers
ef63464bcf8fe scsi: hisi_sas: Create root and device debugfs directories
[Regression Risk]
Code changes are restricted to the on-chip SAS controller on hi1620 SoCs.
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