Commit-ID: aa48b6f708868ab9c22ca737f27a0da832bf7f08
Gitweb: http://git.kernel.org/tip/aa48b6f708868ab9c22ca737f27a0da832bf7f08
Author: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
AuthorDate: Thu, 9 Jul 2015 16:00:47 +0800
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Wed, 22 Jul 2015 18:37:44 +0200
genirq/MSI: Move alloc_msi_entry() from PCI into generic MSI code
Move alloc_msi_entry() from PCI MSI code into generic MSI code, so it
can be reused by other generic MSI drivers. Also introduce
free_msi_entry() for completeness.
Suggested-by: Stuart Yoder <stuart.yoder@xxxxxxxxxxxxx>.
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
Reviewed-by: Marc Zyngier <marc.zyngier@xxxxxxx>
Reviewed-by: Yijing Wang <wangyijing@xxxxxxxxxx>
Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: Grant Likely <grant.likely@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Alexander Gordeev <agordeev@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1436428847-8886-13-git-send-email-jiang.liu@xxxxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
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 897e1a4..cd4c78c 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 518e8c4..f83c87e 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -96,6 +96,8 @@ 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 7bf1f1b..7e6512b 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;
--
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