mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-04-03 12:05:13 +02:00
3f91bec308
[ Upstream commit41a1452759] IO hotplug add event is handled in the user space with drmgr tool. After the device is enabled, the user space uses /sys/kernel/dlpar interface with “dt add index <drc_index>” to update the device tree. The kernel interface (dlpar_hp_dt_add()) finds the parent node for the specified ‘drc_index’ from ibm,drc-info property. The recent FW provides this property from 2017 onwards. But KVM guest code in some releases is still using the older SLOF firmware which has ibm,drc-indexes property instead of ibm,drc-info. If the ibm,drc-info is not available, this patch adds changes to search ‘drc_index’ from the indexes array in ibm,drc-indexes property to support old FW. Fixes:02b98ff44a("powerpc/pseries/dlpar: Add device tree nodes for DLPAR IO add") Reported-by: Kowshik Jois <kowsjois@linux.ibm.com> Signed-off-by: Haren Myneni <haren@linux.ibm.com> Tested-by: Amit Machhiwal <amachhiw@linux.ibm.com> Reviewed-by: Tyrel Datwyler <tyreld@linux.ibm.com> Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com> Link: https://patch.msgid.link/20250531235002.239213-1-haren@linux.ibm.com Signed-off-by: Sasha Levin <sashal@kernel.org>