From: Bartosz Golaszewski <brgl@bgdev.pl>
To: Linus Walleij <linus.walleij@linaro.org>,
Jonathan Cameron <jic23@kernel.org>,
Hartmut Knaack <knaack.h@gmx.de>,
Lars-Peter Clausen <lars@metafoo.de>,
Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
Thomas Gleixner <tglx@linutronix.de>,
Jason Cooper <jason@lakedaemon.net>,
Marc Zyngier <maz@kernel.org>
Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-iio@vger.kernel.org,
Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: [PATCH v2 5/6] irq/domain: provide irq_domain_dispose_mappings() helper
Date: Tue, 11 Feb 2020 14:12:39 +0100 [thread overview]
Message-ID: <20200211131240.15853-6-brgl@bgdev.pl> (raw)
In-Reply-To: <20200211131240.15853-1-brgl@bgdev.pl>
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Unmapping all interrupts before removing an irq_domain is a common
use-case. Provide an appropriate helper that can also be used with
the remove() callback in irq_domain ops.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
include/linux/irqdomain.h | 2 ++
kernel/irq/irqdomain.c | 17 +++++++++++++++++
2 files changed, 19 insertions(+)
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index fbc25f464f62..8fd27614dafd 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -390,6 +390,7 @@ extern unsigned int irq_create_mapping(struct irq_domain *host,
irq_hw_number_t hwirq);
extern unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec);
extern void irq_dispose_mapping(unsigned int virq);
+extern void irq_domain_dispose_mappings(struct irq_domain *domain);
/**
* irq_linear_revmap() - Find a linux irq from a hw irq number.
@@ -594,6 +595,7 @@ irq_domain_hierarchical_is_msi_remap(struct irq_domain *domain)
#else /* CONFIG_IRQ_DOMAIN */
static inline void irq_dispose_mapping(unsigned int virq) { }
+static inline void irq_domain_dispose_mappings(struct irq_domain *domain) { }
static inline struct irq_domain *irq_find_matching_fwnode(
struct fwnode_handle *fwnode, enum irq_domain_bus_token bus_token)
{
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index b391d2e65bdd..d09de9f2411a 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -888,6 +888,23 @@ void irq_dispose_mapping(unsigned int virq)
}
EXPORT_SYMBOL_GPL(irq_dispose_mapping);
+/**
+ * irq_domain_dispose_mappings() - Unmap all interrupts
+ * @domain: domain for which to unmap all interrupts
+ */
+void irq_domain_dispose_mappings(struct irq_domain *domain)
+{
+ unsigned int virq;
+ int i;
+
+ for (i = 0; i < domain->hwirq_max; i++) {
+ virq = irq_find_mapping(domain, i);
+ if (virq)
+ irq_dispose_mapping(virq);
+ }
+}
+EXPORT_SYMBOL_GPL(irq_domain_dispose_mappings);
+
/**
* irq_find_mapping() - Find a linux irq from a hw irq number.
* @domain: domain owning this hardware interrupt
--
2.25.0
next prev parent reply other threads:[~2020-02-11 13:13 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-11 13:12 [PATCH v2 0/6] irq/irq_sim: try to improve the API Bartosz Golaszewski
2020-02-11 13:12 ` [PATCH v2 1/6] irq: make irq_domain_reset_irq_data() available even for non-V2 users Bartosz Golaszewski
2020-02-14 9:02 ` Thomas Gleixner
2020-02-14 9:31 ` Bartosz Golaszewski
2020-02-11 13:12 ` [PATCH v2 2/6] irq/irq_sim: simplify the API Bartosz Golaszewski
2020-02-11 13:12 ` [PATCH v2 3/6] irq/domain: add a new callback to domain ops Bartosz Golaszewski
2020-03-08 13:51 ` Marc Zyngier
2020-03-08 17:59 ` Bartosz Golaszewski
2020-03-12 8:15 ` Bartosz Golaszewski
2020-03-20 9:38 ` Bartosz Golaszewski
2020-02-11 13:12 ` [PATCH v2 4/6] irq/irq_sim: remove irq_domain_remove_sim() Bartosz Golaszewski
2020-02-11 13:12 ` Bartosz Golaszewski [this message]
2020-02-11 13:12 ` [PATCH v2 6/6] irqchip: keystone: use irq_domain_dispose_mappings() Bartosz Golaszewski
2020-03-03 7:57 ` [PATCH v2 0/6] irq/irq_sim: try to improve the API Bartosz Golaszewski
2020-04-13 17:07 ` Jonathan Cameron
2020-04-14 8:37 ` Bartosz Golaszewski
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