Messages in this thread | | | From | Jia-Ju Bai <> | Subject | [BUG] gpio: gpio-adp5588: A possible sleep-in-atomic-context bug in adp5588_gpio_direction_input() | Date | Sat, 11 Aug 2018 10:03:49 +0800 |
| |
The driver may sleep with holding a spinlock.
The function call paths (from bottom to top) in Linux-4.16 are:
[FUNC] mutex_lock_nested drivers/gpio/gpio-adp5588.c, 113: mutex_lock_nested in adp5588_gpio_direction_input drivers/gpio/gpio-adp5588.c, 224: adp5588_gpio_direction_input in adp5588_irq_set_type kernel/irq/manage.c, 686: [FUNC_PTR]adp5588_irq_set_type in __irq_set_trigger kernel/irq/manage.c, 1350: __irq_set_trigger in __setup_irq kernel/irq/manage.c, 1238: _raw_spin_lock_irqsave in __setup_irq
Note that [FUNC_PTR] means a function pointer call is used.
I do not find a good way to fix, so I only report. This is found by my static analysis tool (DSAC).
Best wishes, Jia-Ju Bai
| |