[RFC Patch V1 12/12] genirq, PCI: Move alloc_msi_entry() from PCI MSI code into generic MSI code
From: Jiang Liu <hidden>
Date: 2015-07-09 08:01:15
Also in:
linux-pci, lkml
Subsystem:
irq domains (irq number mapping library), irq subsystem, pci subsystem, the rest · Maintainers:
Thomas Gleixner, Bjorn Helgaas, Linus Torvalds
Move alloc_msi_entry() from PCI MSI code into generic MSI code, so it could be reused by other generic MSI drivers. Also introduce free_msi_entry() for completeness. This is suggested by Stuart Yoder [off-list ref]. Signed-off-by: Stuart Yoder <redacted> Signed-off-by: Jiang Liu <redacted> --- drivers/pci/msi.c | 16 ++-------------- include/linux/msi.h | 2 ++ kernel/irq/msi.c | 17 +++++++++++++++++ 3 files changed, 21 insertions(+), 14 deletions(-)
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 260c1653701d..373d96e06cbd 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c@@ -406,18 +406,6 @@ static void free_msi_irqs(struct pci_dev *dev) } } -static struct msi_desc *alloc_msi_entry(struct pci_dev *dev) -{ - struct msi_desc *desc = kzalloc(sizeof(*desc), GFP_KERNEL); - if (!desc) - return NULL; - - INIT_LIST_HEAD(&desc->list); - desc->dev = &dev->dev; - - return desc; -} - static void pci_intx_for_msi(struct pci_dev *dev, int enable) { if (!(dev->dev_flags & PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG))
@@ -572,7 +560,7 @@ static struct msi_desc *msi_setup_entry(struct pci_dev *dev, int nvec) struct msi_desc *entry; /* MSI Entry Initialization */ - entry = alloc_msi_entry(dev); + entry = alloc_msi_entry(&dev->dev); if (!entry) return NULL;
@@ -700,7 +688,7 @@ static int msix_setup_entries(struct pci_dev *dev, void __iomem *base, int i; for (i = 0; i < nvec; i++) { - entry = alloc_msi_entry(dev); + entry = alloc_msi_entry(&dev->dev); if (!entry) { if (!i) iounmap(base);
diff --git a/include/linux/msi.h b/include/linux/msi.h
index f6845bc83774..c10ec5687efa 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h@@ -67,6 +67,8 @@ static inline void *msi_desc_to_pci_sysdata(struct msi_desc *desc) } #endif /* CONFIG_PCI_MSI */ +struct msi_desc *alloc_msi_entry(struct device *dev); +void free_msi_entry(struct msi_desc *entry); void __pci_read_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void __pci_write_msi_msg(struct msi_desc *entry, struct msi_msg *msg); void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg);
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index 7bf1f1bbb7fa..7e6512b9dc1f 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c@@ -18,6 +18,23 @@ /* Temparory solution for building, will be removed later */ #include <linux/pci.h> +struct msi_desc *alloc_msi_entry(struct device *dev) +{ + struct msi_desc *desc = kzalloc(sizeof(*desc), GFP_KERNEL); + if (!desc) + return NULL; + + INIT_LIST_HEAD(&desc->list); + desc->dev = dev; + + return desc; +} + +void free_msi_entry(struct msi_desc *entry) +{ + kfree(entry); +} + void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg) { *msg = entry->msg;
--
1.7.10.4