From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Wolfram Sang <wsa@kernel.org>,
greybus-dev@lists.linaro.org, linux-i2c@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-staging@lists.linux.dev,
linux-usb@vger.kernel.org, netdev@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>,
Alex Elder <elder@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Hans de Goede <hdegoede@redhat.com>,
Jakub Kicinski <kuba@kernel.org>, Johan Hovold <johan@kernel.org>,
Lee Jones <lee.jones@linaro.org>,
Rui Miguel Silva <rmfrfs@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
UNGLinuxDriver@microchip.com,
Woojung Huh <woojung.huh@microchip.com>,
Oleksandr Natalenko <oleksandr@natalenko.name>
Subject: [PATCH v3 1/7] genirq: Provide generic_handle_irq_safe().
Date: Wed, 9 Feb 2022 09:33:55 +0100 [thread overview]
Message-ID: <YgN8cx/t1JvATvxh@linutronix.de> (raw)
In-Reply-To: <YgArWgyvy9xF3V5Q@kunai>
Provide generic_handle_irq_safe() which can used from any context.
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
v2…v3: Correct kernel doc for generic_handle_irq_safe() as per Wolfram
Sang.
include/linux/irqdesc.h | 1 +
kernel/irq/irqdesc.c | 23 +++++++++++++++++++++++
2 files changed, 24 insertions(+)
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index 93d270ca0c567..a77584593f7d1 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -160,6 +160,7 @@ static inline void generic_handle_irq_desc(struct irq_desc *desc)
int handle_irq_desc(struct irq_desc *desc);
int generic_handle_irq(unsigned int irq);
+int generic_handle_irq_safe(unsigned int irq);
#ifdef CONFIG_IRQ_DOMAIN
/*
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 2267e6527db3c..346d283d2da14 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -662,6 +662,29 @@ int generic_handle_irq(unsigned int irq)
}
EXPORT_SYMBOL_GPL(generic_handle_irq);
+/**
+ * generic_handle_irq_safe - Invoke the handler for a particular irq from any
+ * context.
+ * @irq: The irq number to handle
+ *
+ * Returns: 0 on success, a negative value on error.
+ *
+ * This function can be called from any context (IRQ or process context). It
+ * will report an error if not invoked from IRQ context and the irq has been
+ * marked to enforce IRQ-context only.
+ */
+int generic_handle_irq_safe(unsigned int irq)
+{
+ unsigned long flags;
+ int ret;
+
+ local_irq_save(flags);
+ ret = handle_irq_desc(irq_to_desc(irq));
+ local_irq_restore(flags);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(generic_handle_irq_safe);
+
#ifdef CONFIG_IRQ_DOMAIN
/**
* generic_handle_domain_irq - Invoke the handler for a HW irq belonging
--
2.34.1
next prev parent reply other threads:[~2022-02-09 8:34 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-31 12:33 [PATCH v2 0/7] Provide and use generic_handle_irq_safe() where appropriate Sebastian Andrzej Siewior
2022-01-31 12:33 ` [PATCH v2 1/7] genirq: Provide generic_handle_irq_safe() Sebastian Andrzej Siewior
2022-02-06 20:11 ` Wolfram Sang
2022-02-09 8:33 ` Sebastian Andrzej Siewior [this message]
2022-01-31 12:33 ` [PATCH v2 2/7] i2c: core: Use generic_handle_irq_safe() in i2c_handle_smbus_host_notify() Sebastian Andrzej Siewior
2022-01-31 12:34 ` [PATCH v2 3/7] i2c: cht-wc: Use generic_handle_irq_safe() Sebastian Andrzej Siewior
2022-01-31 12:34 ` [PATCH v2 4/7] mfd: hi6421-spmi-pmic: " Sebastian Andrzej Siewior
2022-01-31 15:54 ` Lee Jones
2022-02-01 10:19 ` [PATCH v2.1 4/7] misc: " Sebastian Andrzej Siewior
2022-01-31 12:34 ` [PATCH v2 5/7] mfd: ezx-pcap: " Sebastian Andrzej Siewior
2022-01-31 12:34 ` [PATCH v2 6/7] net: usb: lan78xx: " Sebastian Andrzej Siewior
2022-01-31 12:34 ` [PATCH v2 7/7] staging: greybus: gpio: " Sebastian Andrzej Siewior
2022-01-31 12:54 ` Greg Kroah-Hartman
2022-02-01 9:45 ` Johan Hovold
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