[PATCH] powerpc/crash: update fdt on cpu hotplug remove

From: Shivang Upadhyay

Date: Tue Nov 03 2026 - 03:59:01 EST


Currently fdt for crash kernel is not updated on cpu hotplug remove,
which can lead to the following XIVE warnings on the crash kernel
bringup.

[ 0.630795][ T1] xive: H_INT_GET_QUEUE_INFO cpu=16 prio=6 failed -55
[ 0.630912][ T1] xive: Error -55 getting queue info CPU 16 prio 6
[ 0.680899][ T1] xive: H_INT_GET_QUEUE_INFO cpu=17 prio=6 failed -55
[ 0.681000][ T1] xive: Error -55 getting queue info CPU 17 prio 6

Fixing this by updating crash fdt on cpu hotplug remove path also.

Reported-by: Anushree Mathur <anushree.mathur@xxxxxxxxxxxxx>
Suggested-by: Sourabh Jain <sourabhjain@xxxxxxxxxxxxx>
Signed-off-by: Shivang Upadhyay <shivangu@xxxxxxxxxxxxx>
---
arch/powerpc/kexec/crash.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/arch/powerpc/kexec/crash.c b/arch/powerpc/kexec/crash.c
index 775895f31037..0ef10e39ae49 100644
--- a/arch/powerpc/kexec/crash.c
+++ b/arch/powerpc/kexec/crash.c
@@ -639,8 +639,6 @@ void arch_crash_handle_hotplug_event(struct kimage *image, void *arg)

switch (image->hp_action) {
case KEXEC_CRASH_HP_REMOVE_CPU:
- return;
-
case KEXEC_CRASH_HP_ADD_CPU:
update_crash_fdt(image);
break;
--
2.54.0