Changeset 772 for GPL/trunk/lib32/irq.c

Timestamp:

Apr 19, 2025, 8:08:37 PM (4 months ago)

Author:

David Azarewicz

Message:

Merge in changes from 6.6-LTS branch.
Fixed additional 25+ problems.

Location:

GPL/trunk

Files:

• . (modified) (1 prop)
• lib32/irq.c (modified) (1 diff)

GPL/trunk/lib32/irq.c

@@ -249 +249 @@
 //******************************************************************************
 
+/*
+ * Device resource management aware IRQ request/free implementation.
+ */
+struct irq_devres {
+        unsigned int irq;
+        void *dev_id;
+}; 
+
+static void devm_irq_release(struct device *dev, void *res)
+{
+        struct irq_devres *this = res;
+
+        free_irq(this->irq, this->dev_id);
+}
+
+/**
+ *      devm_request_threaded_irq - allocate an interrupt line for a managed device
+ *      @dev: device to request interrupt for
+ *      @irq: Interrupt line to allocate
+ *      @handler: Function to be called when the IRQ occurs
+ *      @thread_fn: function to be called in a threaded interrupt context. NULL
+ *                  for devices which handle everything in @handler
+ *      @irqflags: Interrupt type flags
+ *      @devname: An ascii name for the claiming device, dev_name(dev) if NULL
+ *      @dev_id: A cookie passed back to the handler function
+ *
+ *      Except for the extra @dev argument, this function takes the
+ *      same arguments and performs the same function as
+ *      request_threaded_irq().  IRQs requested with this function will be
+ *      automatically freed on driver detach.
+ *
+ *      If an IRQ allocated with this function needs to be freed
+ *      separately, devm_free_irq() must be used.
+ */
+int devm_request_threaded_irq(struct device *dev, unsigned int irq,
+                              irq_handler_t handler, irq_handler_t thread_fn,
+                              unsigned long irqflags, const char *devname,
+                              void *dev_id)
+{
+        struct irq_devres *dr;
+        int rc;
+
+        dr = devres_alloc(devm_irq_release, sizeof(struct irq_devres),
+                          GFP_KERNEL);
+        if (!dr)
+                return -ENOMEM;
+
+        if (!devname)
+                devname = dev_name(dev);
+
+        rc = request_irq(irq, handler, irqflags, devname,
+                                  dev_id);
+        if (rc) {
+                devres_free(dr);
+                return rc;
+        }
+
+        dr->irq = irq;
+        dr->dev_id = dev_id;
+        devres_add(dev, dr);
+
+        return 0;
+}