From ee08e24c2e761e6aa3ef2c03cc2004e11fe111b3 Mon Sep 17 00:00:00 2001 From: Brian Masney Date: Thu, 7 Feb 2019 21:16:25 -0500 Subject: [PATCH] mfd: pm8xxx: disassociate old virq if hwirq mapping already exists Check to see if the hwirq is already associated with another virq on this IRQ domain. If so, then disassociate it before associating the hwirq with the new virq. This is a temporary hack that is needed in order to not break git bisect for existing boards. The next patch in this series converts ssbi-gpio to be a hierarchical IRQ chip, then there are several patches to update all of the device tree files, and finally this patch will be reverted within the same patch series. IRQs for ssbi-gpio are all initially setup without an IRQ hierarchy this driver is probed due to the interrupts property in device tree. Once ssbi-gpio is converted to be a hierarchical IRQ chip in the next patch, existing users of gpio[d]_to_irq() will call pmic_gpio_to_irq(), and that will use the new IRQ chip code in ssbi-gpio that sets up the IRQ in an IRQ hierarchy. The hwirq is now associated with two Linux virqs and interrupts will not work as expected. This patch corrects that issue. This change was tested on an APQ8060 DragonBoard. Signed-off-by: Brian Masney Tested-by: Linus Walleij Acked-by: Lee Jones Signed-off-by: Linus Walleij --- drivers/mfd/qcom-pm8xxx.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/mfd/qcom-pm8xxx.c b/drivers/mfd/qcom-pm8xxx.c index 8eb2528793f9..2f99a98ccee5 100644 --- a/drivers/mfd/qcom-pm8xxx.c +++ b/drivers/mfd/qcom-pm8xxx.c @@ -380,6 +380,12 @@ static void pm8xxx_irq_domain_map(struct pm_irq_chip *chip, struct irq_domain *domain, unsigned int irq, irq_hw_number_t hwirq, unsigned int type) { + unsigned int old_virq; + + old_virq = irq_find_mapping(domain, hwirq); + if (old_virq) + irq_domain_disassociate(domain, old_virq); + irq_domain_set_info(domain, irq, hwirq, chip->pm_irq_data->irq_chip, chip, handle_level_irq, NULL, NULL); irq_set_noprobe(irq);