Le 11/04/2017 à 12:40, Michael Ellerman a écrit :
Frederic Barrat <fbarrat@xxxxxxxxxxxxxxxxxx> writes:
Le 05/04/2017 à 13:35, Vaibhav Jain a écrit :
During an eeh event when the cxl card is fenced and card sysfs attr
perst_reloads_same_image is set following warning message is seen in the
kernel logs:
[ 60.622727] Adapter context unlocked with 0 active contexts
[ 60.622762] ------------[ cut here ]------------
[ 60.622771] WARNING: CPU: 12 PID: 627 at
../drivers/misc/cxl/main.c:325 cxl_adapter_context_unlock+0x60/0x80 [cxl]
Even though this warning is harmless, it clutters the kernel log
during an eeh event. This warning is triggered as the EEH callback
cxl_pci_error_detected doesn't obtain a context-lock before forcibly
detaching all active context and when context-lock is released during
call to cxl_configure_adapter from cxl_pci_slot_reset, a warning in
cxl_adapter_context_unlock is triggered.
To fix this warning, we acquire the adapter context-lock via
cxl_adapter_context_lock() in the eeh callback
cxl_pci_error_detected() once all the virtual AFU PHBs are notified
and their contexts detached. The context-lock is released in
cxl_pci_slot_reset() after the adapter is successfully reconfigured
and before we call slot_reset callback on slice attached device-drivers.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 70b565bbdb91("cxl: Prevent adapter reset if an active context exists")
Reported-by: Andrew Donnellan <andrew.donnellan@xxxxxxxxxxx>
Signed-off-by: Vaibhav Jain <vaibhav@xxxxxxxxxxxxxxxxxx>
---
Pending test result from cxl-flash:
Acked-by: Frederic Barrat <fbarrat@xxxxxxxxxxxxxxxxxx>
Still pending ... ?
Yes, still waiting. It was mentioned in a call with the cxlflash team
yesterday.
Fred
cheers