From: Kevin Hao <haokexin@gmail.com>
Date: Tue, 14 Jan 2020 16:28:20 +0800
Subject: gpiolib: Add the support for the msi parent domain
Git-commit: 880b7cf22e8ca08abd969b0f1c65a79121e025c5
Patch-mainline: v5.6-rc1
References: jsc#SLE-15847
If the gpio's parent irqdomain is a msi irqdomain, we should ignore
the EEXIST error returned by the msi irqdomain because all the msi
interrupts have already been allocated.
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Link: https://lore.kernel.org/r/20200114082821.14015-4-haokexin@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
drivers/gpio/gpiolib.c | 6 ++++++
1 file changed, 6 insertions(+)
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1915,6 +1915,12 @@ static int gpiochip_hierarchy_irq_domain
irq, parent_hwirq);
irq_set_lockdep_class(irq, gc->irq.lock_key, gc->irq.request_key);
ret = irq_domain_alloc_irqs_parent(d, irq, 1, parent_arg);
+ /*
+ * If the parent irqdomain is msi, the interrupts have already
+ * been allocated, so the EEXIST is good.
+ */
+ if (irq_domain_is_msi(d->parent) && (ret == -EEXIST))
+ ret = 0;
if (ret)
chip_err(gc,
"failed to allocate parent hwirq %d for hwirq %lu\n",