linux-kernel - [tip:irq/core] genirq/MSI: Store 'struct device' instead of ' struct pci_dev' in struct msi

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Message-ID: <tip-25a98bd4ff9355a218d2e7aa4d6e3c9bc2c27d6f@git.kernel.org>
Date:	Wed, 22 Jul 2015 13:40:41 -0700
From:	tip-bot for Jiang Liu <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	jiang.liu@...ux.intel.com, tony.luck@...el.com,
	bhelgaas@...gle.com, linux-kernel@...r.kernel.org, bp@...en8.de,
	mingo@...nel.org, stuart.yoder@...escale.com, agordeev@...hat.com,
	tglx@...utronix.de, marc.zyngier@....com, grant.likely@...aro.org,
	wangyijing@...wei.com, hpa@...or.com
Subject: [tip:irq/core] genirq/MSI: Store 'struct device' instead of '
 struct pci_dev' in struct msi_desc

Commit-ID:  25a98bd4ff9355a218d2e7aa4d6e3c9bc2c27d6f
Gitweb:     http://git.kernel.org/tip/25a98bd4ff9355a218d2e7aa4d6e3c9bc2c27d6f
Author:     Jiang Liu <jiang.liu@...ux.intel.com>
AuthorDate: Thu, 9 Jul 2015 16:00:45 +0800
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Wed, 22 Jul 2015 18:37:43 +0200

genirq/MSI: Store 'struct device' instead of 'struct pci_dev' in struct msi_desc

Store 'struct device *' instead of 'struct pci_dev *' in struct msi_desc,
so struct msi_desc can be reused by non PCI based MSI drivers.

Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
Reviewed-by: Yijing Wang <wangyijing@...wei.com>
Reviewed-by: Marc Zyngier <marc.zyngier@....com>
Cc: Tony Luck <tony.luck@...el.com>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Grant Likely <grant.likely@...aro.org>
Cc: Stuart Yoder <stuart.yoder@...escale.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Alexander Gordeev <agordeev@...hat.com>
Link: http://lkml.kernel.org/r/1436428847-8886-11-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 drivers/pci/msi.c   |  7 ++++++-
 include/linux/msi.h | 11 ++++-------
 2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 4ef5021..897e1a4 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -413,7 +413,7 @@ static struct msi_desc *alloc_msi_entry(struct pci_dev *dev)
 		return NULL;
 
 	INIT_LIST_HEAD(&desc->list);
-	desc->dev = dev;
+	desc->dev = &dev->dev;
 
 	return desc;
 }
@@ -1140,6 +1140,11 @@ int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
 }
 EXPORT_SYMBOL(pci_enable_msix_range);
 
+struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc)
+{
+	return to_pci_dev(desc->dev);
+}
+
 void *msi_desc_to_pci_sysdata(struct msi_desc *desc)
 {
 	struct pci_dev *dev = msi_desc_to_pci_dev(desc);
diff --git a/include/linux/msi.h b/include/linux/msi.h
index 57fe766..5f77e23 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -14,6 +14,7 @@ extern int pci_msi_ignore_mask;
 /* Helper functions */
 struct irq_data;
 struct msi_desc;
+struct pci_dev;
 void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg);
 void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg);
 
@@ -37,14 +38,14 @@ struct msi_desc {
 		void __iomem *mask_base;
 		u8 mask_pos;
 	};
-	struct pci_dev *dev;
+	struct device *dev;
 
 	/* Last set MSI message */
 	struct msi_msg msg;
 };
 
 /* Helpers to hide struct msi_desc implementation details */
-#define msi_desc_to_dev(desc)		(&(desc)->dev.dev)
+#define msi_desc_to_dev(desc)		((desc)->dev)
 #define dev_to_msi_list(dev)		(&(dev)->msi_list)
 #define first_msi_entry(dev)		\
 	list_first_entry(dev_to_msi_list((dev)), struct msi_desc, list)
@@ -56,11 +57,7 @@ struct msi_desc {
 #define for_each_pci_msi_entry(desc, pdev)	\
 	for_each_msi_entry((desc), &(pdev)->dev)
 
-static inline struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc)
-{
-	return desc->dev;
-}
-
+struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc);
 void *msi_desc_to_pci_sysdata(struct msi_desc *desc);
 #else /* CONFIG_PCI_MSI */
 static inline void *msi_desc_to_pci_sysdata(struct msi_desc *desc)
--
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