genirq/msi: Remove the original sysfs interfaces

No more users. Refactor the core code accordingly and move the global
interface under CONFIG_PCI_MSI_ARCH_FALLBACKS.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221814.168362229@linutronix.de

diff --git a/include/linux/msi.h b/include/linux/msi.h
index 1b96dc4..634a129 100644 (file)
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -249,22 +249,10 @@ void pci_msi_unmask_irq(struct irq_data *data);
 #ifdef CONFIG_SYSFS
 int msi_device_populate_sysfs(struct device *dev);
 void msi_device_destroy_sysfs(struct device *dev);
-
-const struct attribute_group **msi_populate_sysfs(struct device *dev);
-void msi_destroy_sysfs(struct device *dev,
-                      const struct attribute_group **msi_irq_groups);
-#else
+#else /* CONFIG_SYSFS */
 static inline int msi_device_populate_sysfs(struct device *dev) { return 0; }
 static inline void msi_device_destroy_sysfs(struct device *dev) { }
-
-static inline const struct attribute_group **msi_populate_sysfs(struct device *dev)
-{
-       return NULL;
-}
-static inline void msi_destroy_sysfs(struct device *dev, const struct attribute_group **msi_irq_groups)
-{
-}
-#endif
+#endif /* !CONFIG_SYSFS */
 
 /*
  * The arch hooks to setup up msi irqs. Default functions are implemented
@@ -279,7 +267,7 @@ int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc);
 void arch_teardown_msi_irq(unsigned int irq);
 int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type);
 void arch_teardown_msi_irqs(struct pci_dev *dev);
-#endif
+#endif /* CONFIG_PCI_MSI_ARCH_FALLBACKS */
 
 /*
  * The restore hook is still available even for fully irq domain based

diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index dd65e67..8e433f1 100644 (file)
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -118,12 +118,8 @@ static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr,
 /**
  * msi_populate_sysfs - Populate msi_irqs sysfs entries for devices
  * @dev:       The device(PCI, platform etc) who will get sysfs entries
- *
- * Return attribute_group ** so that specific bus MSI can save it to
- * somewhere during initilizing msi irqs. If devices has no MSI irq,
- * return NULL; if it fails to populate sysfs, return ERR_PTR
  */
-const struct attribute_group **msi_populate_sysfs(struct device *dev)
+static const struct attribute_group **msi_populate_sysfs(struct device *dev)
 {
        const struct attribute_group **msi_irq_groups;
        struct attribute **msi_attrs, *msi_attr;
@@ -214,41 +210,32 @@ int msi_device_populate_sysfs(struct device *dev)
 }
 
 /**
- * msi_destroy_sysfs - Destroy msi_irqs sysfs entries for devices
- * @dev:               The device(PCI, platform etc) who will remove sysfs entries
- * @msi_irq_groups:    attribute_group for device msi_irqs entries
- */
-void msi_destroy_sysfs(struct device *dev, const struct attribute_group **msi_irq_groups)
-{
-       struct device_attribute *dev_attr;
-       struct attribute **msi_attrs;
-       int count = 0;
-
-       if (msi_irq_groups) {
-               sysfs_remove_groups(&dev->kobj, msi_irq_groups);
-               msi_attrs = msi_irq_groups[0]->attrs;
-               while (msi_attrs[count]) {
-                       dev_attr = container_of(msi_attrs[count],
-                                       struct device_attribute, attr);
-                       kfree(dev_attr->attr.name);
-                       kfree(dev_attr);
-                       ++count;
-               }
-               kfree(msi_attrs);
-               kfree(msi_irq_groups[0]);
-               kfree(msi_irq_groups);
-       }
-}
-
-/**
  * msi_device_destroy_sysfs - Destroy msi_irqs sysfs entries for a device
  * @dev:               The device (PCI, platform etc) for which to remove
  *                     sysfs entries
  */
 void msi_device_destroy_sysfs(struct device *dev)
 {
-       msi_destroy_sysfs(dev, dev->msi.data->attrs);
+       const struct attribute_group **msi_irq_groups = dev->msi.data->attrs;
+       struct device_attribute *dev_attr;
+       struct attribute **msi_attrs;
+       int count = 0;
+
        dev->msi.data->attrs = NULL;
+       if (!msi_irq_groups)
+               return;
+
+       sysfs_remove_groups(&dev->kobj, msi_irq_groups);
+       msi_attrs = msi_irq_groups[0]->attrs;
+       while (msi_attrs[count]) {
+               dev_attr = container_of(msi_attrs[count], struct device_attribute, attr);
+               kfree(dev_attr->attr.name);
+               kfree(dev_attr);
+               ++count;
+       }
+       kfree(msi_attrs);
+       kfree(msi_irq_groups[0]);
+       kfree(msi_irq_groups);
 }
 #endif