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ea9a26d117
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:
Adapter context unlocked with 0 active contexts
------------[ cut here ]------------
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 the we call the slot_reset callback on slice attached
device-drivers.
Fixes:
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.. | ||
api.c | ||
base.c | ||
context.c | ||
cxl.h | ||
debugfs.c | ||
fault.c | ||
file.c | ||
flash.c | ||
guest.c | ||
hcalls.c | ||
hcalls.h | ||
irq.c | ||
Kconfig | ||
main.c | ||
Makefile | ||
native.c | ||
of.c | ||
pci.c | ||
phb.c | ||
sysfs.c | ||
trace.c | ||
trace.h | ||
vphb.c |