gpiolib: irqchip: use irq_find_mapping while removing irqchip
There is no guarantee that VIRQs will be allocated sequentially
for gpio irqchip in gpiochip_irqchip_add().
Therefore, it's unsafe to dispose VIRQ in gpiochip_irqchip_remove()
basing on index relatively to stored irq_base value.
Hence, use irq_find_mapping for VIRQ finding in gpiochip_irqchip_remove()
instead of irq_base + index.
Reported-by: Wang, Yalin <Yalin.Wang@sonymobile.com>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 6fdae78..550e575 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -514,7 +514,8 @@
/* Remove all IRQ mappings and delete the domain */
if (gpiochip->irqdomain) {
for (offset = 0; offset < gpiochip->ngpio; offset++)
- irq_dispose_mapping(gpiochip->irq_base + offset);
+ irq_dispose_mapping(
+ irq_find_mapping(gpiochip->irqdomain, offset));
irq_domain_remove(gpiochip->irqdomain);
}