The irq_find_mapping() function can return 0 when called in the
rmi_process_interrupt_requests() function.
This causes a kernel crash. Check for a 0 value and skip calling
handle_nested_irq() in that case.
This was tested with the F54 function enabled on a Lenovo X1 Carbon.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Fixes: 24d28e4f1271 ("Input: synaptics-rmi4 - convert irq distribution to irq_domain")
---
drivers/input/rmi4/rmi_driver.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/input/rmi4/rmi_driver.c b/drivers/input/rmi4/rmi_driver.c
index 772493b1f665..6085ec424a84 100644
--- a/drivers/input/rmi4/rmi_driver.c
+++ b/drivers/input/rmi4/rmi_driver.c
@@ -154,8 +154,12 @@ static int rmi_process_interrupt_requests(struct rmi_device *rmi_dev)
*/
mutex_unlock(&data->irq_mutex);
- for_each_set_bit(i, data->irq_status, data->irq_count)
- handle_nested_irq(irq_find_mapping(data->irqdomain, i));
+ for_each_set_bit(i, data->irq_status, data->irq_count) {
+ unsigned int irq = irq_find_mapping(data->irqdomain, i);
+
+ if (irq)
+ handle_nested_irq(irq);
+ }
if (data->input)
input_sync(data->input);
--
2.23.0
