Up until commit
6a45b0e2589f ("gpiolib: Introduce
gpiochip_irqchip_add_domain()") all irq_domains were allocated
by gpiolib itself and thus gpiolib also takes care of freeing it.
With gpiochip_irqchip_add_domain() a user of gpiolib can associate an
irq_domain with the gpio_chip. This irq_domain is not managed by
gpiolib and therefore must not be freed by gpiolib.
Fixes: 6a45b0e2589f ("gpiolib: Introduce gpiochip_irqchip_add_domain()")
Reported-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: Michael Walle <mwalle@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
}
/* Remove all IRQ mappings and delete the domain */
- if (gc->irq.domain) {
+ if (!gc->irq.domain_is_allocated_externally && gc->irq.domain) {
unsigned int irq;
for (offset = 0; offset < gc->ngpio; offset++) {
gc->to_irq = gpiochip_to_irq;
gc->irq.domain = domain;
+ gc->irq.domain_is_allocated_externally = true;
/*
* Using barrier() here to prevent compiler from reordering
*/
bool initialized;
+ /**
+ * @domain_is_allocated_externally:
+ *
+ * True it the irq_domain was allocated outside of gpiolib, in which
+ * case gpiolib won't free the irq_domain itself.
+ */
+ bool domain_is_allocated_externally;
+
/**
* @init_hw: optional routine to initialize hardware before
* an IRQ chip will be added. This is quite useful when