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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2022-02-11 21:14:54 +0300
committerThomas Gleixner <tglx@linutronix.de>2022-02-21 13:31:06 +0300
commit509853f9e1e7b1490dc79f735a5dbafc9298f40d (patch)
treeed7a7c7927bb7a7e974c16308d3e5f1241dd5f65 /kernel/irq
parentcfb92440ee71adcc2105b0890bb01ac3cddb8507 (diff)
downloadlinux-509853f9e1e7b1490dc79f735a5dbafc9298f40d.tar.xz
genirq: Provide generic_handle_irq_safe()
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> Signed-off-by: Thomas Gleixner <tglx@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> Link: https://lore.kernel.org/r/20220211181500.1856198-2-bigeasy@linutronix.de
Diffstat (limited to 'kernel/irq')
-rw-r--r--kernel/irq/irqdesc.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 2267e6527db3..346d283d2da1 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