[tip:irq/core] PCI/keystone: Use irq_data_get_msi_desc() to avoid redundant lookup of irq_data

[tip-bot for Jiang Liu <tipbot@xxxxxxxxx>]

Commit-ID:  40b6d3faef73e6a877fe157f48df1af90bddd9e5
Gitweb:     http://git.kernel.org/tip/40b6d3faef73e6a877fe157f48df1af90bddd9e5
Author:     Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
AuthorDate: Thu, 4 Jun 2015 12:13:23 +0800
Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Thu, 16 Jul 2015 23:31:37 +0200

PCI/keystone: Use irq_data_get_msi_desc() to avoid redundant lookup of irq_data

Use irq_data_get_msi_desc() to avoid redundant lookup of irq_data while we
already have a pointer to corresponding irq_data.

Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Murali Karicheri <m-karicheri2@xxxxxx>
Cc: linux-pci@xxxxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 drivers/pci/host/pci-keystone-dw.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/drivers/pci/host/pci-keystone-dw.c b/drivers/pci/host/pci-keystone-dw.c
index f34892e..e42d077 100644
--- a/drivers/pci/host/pci-keystone-dw.c
+++ b/drivers/pci/host/pci-keystone-dw.c
@@ -104,14 +104,13 @@ static void ks_dw_pcie_msi_irq_ack(struct irq_data *d)
 {
 	u32 offset, reg_offset, bit_pos;
 	struct keystone_pcie *ks_pcie;
-	unsigned int irq = d->irq;
 	struct msi_desc *msi;
 	struct pcie_port *pp;
 
-	msi = irq_get_msi_desc(irq);
+	msi = irq_data_get_msi_desc(d);
 	pp = sys_to_pcie(msi->dev->bus->sysdata);
 	ks_pcie = to_keystone_pcie(pp);
-	offset = irq - irq_linear_revmap(pp->irq_domain, 0);
+	offset = d->irq - irq_linear_revmap(pp->irq_domain, 0);
 	update_reg_offset_bit_pos(offset, &reg_offset, &bit_pos);
 
 	writel(BIT(bit_pos),
@@ -142,15 +141,14 @@ void ks_dw_pcie_msi_clear_irq(struct pcie_port *pp, int irq)
 static void ks_dw_pcie_msi_irq_mask(struct irq_data *d)
 {
 	struct keystone_pcie *ks_pcie;
-	unsigned int irq = d->irq;
 	struct msi_desc *msi;
 	struct pcie_port *pp;
 	u32 offset;
 
-	msi = irq_get_msi_desc(irq);
+	msi = irq_data_get_msi_desc(d);
 	pp = sys_to_pcie(msi->dev->bus->sysdata);
 	ks_pcie = to_keystone_pcie(pp);
-	offset = irq - irq_linear_revmap(pp->irq_domain, 0);
+	offset = d->irq - irq_linear_revmap(pp->irq_domain, 0);
 
 	/* Mask the end point if PVM implemented */
 	if (IS_ENABLED(CONFIG_PCI_MSI)) {
@@ -164,15 +162,14 @@ static void ks_dw_pcie_msi_irq_mask(struct irq_data *d)
 static void ks_dw_pcie_msi_irq_unmask(struct irq_data *d)
 {
 	struct keystone_pcie *ks_pcie;
-	unsigned int irq = d->irq;
 	struct msi_desc *msi;
 	struct pcie_port *pp;
 	u32 offset;
 
-	msi = irq_get_msi_desc(irq);
+	msi = irq_data_get_msi_desc(d);
 	pp = sys_to_pcie(msi->dev->bus->sysdata);
 	ks_pcie = to_keystone_pcie(pp);
-	offset = irq - irq_linear_revmap(pp->irq_domain, 0);
+	offset = d->irq - irq_linear_revmap(pp->irq_domain, 0);
 
 	/* Mask the end point if PVM implemented */
 	if (IS_ENABLED(CONFIG_PCI_MSI)) {
--
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