lockdep_hardirq_threaded() is supposed to be used within IRQ core code
and not within drivers. It is not obvious from within the driver, that
this is the only interrupt service routing and that it is not shared
handler.
Replace lockdep_hardirq_threaded() with a lockdep annotation limiting
threaded context on PREEMPT_RT to __vmbus_isr().
Fixes: f8e6343b7a89c ("Drivers: hv: vmbus: Use kthread for vmbus interrupts on
PREEMPT_RT")
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
---
drivers/hv/vmbus_drv.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index bc4fc1951ae1c..e44275370ac2a 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -1407,8 +1407,11 @@ void vmbus_isr(void)
if (IS_ENABLED(CONFIG_PREEMPT_RT)) {
vmbus_irqd_wake();
} else {
- lockdep_hardirq_threaded();
+ static DEFINE_WAIT_OVERRIDE_MAP(vmbus_map, LD_WAIT_CONFIG);
+
+ lock_map_acquire_try(&vmbus_map);
__vmbus_isr();
+ lock_map_release(&vmbus_map);
}
}
EXPORT_SYMBOL_FOR_MODULES(vmbus_isr, "mshv_vtl");
--
2.53.0
