[Intel-gfx] [patch 19/30] PCI: mobiveil: Use irq_data_get_irq_chip_data()

[Thomas Gleixner]

Going through a full irq descriptor lookup instead of just using the proper
helper function which provides direct access is suboptimal.

In fact it _is_ wrong because the chip callback needs to get the chip data
which is relevant for the chip while using the irq descriptor variant
returns the irq chip data of the top level chip of a hierarchy. It does not
matter in this case because the chip is the top level chip, but that
doesn't make it more correct.

Signed-off-by: Thomas Gleixner <tglx at linutronix.de>
Cc: Karthikeyan Mitran <m.karthikeyan at mobiveil.co.in>
Cc: Hou Zhiqiang <Zhiqiang.Hou at nxp.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi at arm.com>
Cc: Rob Herring <robh at kernel.org>
Cc: Bjorn Helgaas <bhelgaas at google.com>
Cc: linux-pci at vger.kernel.org
---
 drivers/pci/controller/mobiveil/pcie-mobiveil-host.c |    8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

--- a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
@@ -306,13 +306,11 @@ int mobiveil_host_init(struct mobiveil_p
 
 static void mobiveil_mask_intx_irq(struct irq_data *data)
 {
-	struct irq_desc *desc = irq_to_desc(data->irq);
-	struct mobiveil_pcie *pcie;
+	struct mobiveil_pcie *pcie = irq_data_get_irq_chip_data(data);
 	struct mobiveil_root_port *rp;
 	unsigned long flags;
 	u32 mask, shifted_val;
 
-	pcie = irq_desc_get_chip_data(desc);
 	rp = &pcie->rp;
 	mask = 1 << ((data->hwirq + PAB_INTX_START) - 1);
 	raw_spin_lock_irqsave(&rp->intx_mask_lock, flags);
@@ -324,13 +322,11 @@ static void mobiveil_mask_intx_irq(struc
 
 static void mobiveil_unmask_intx_irq(struct irq_data *data)
 {
-	struct irq_desc *desc = irq_to_desc(data->irq);
-	struct mobiveil_pcie *pcie;
+	struct mobiveil_pcie *pcie = irq_data_get_irq_chip_data(data);
 	struct mobiveil_root_port *rp;
 	unsigned long flags;
 	u32 shifted_val, mask;
 
-	pcie = irq_desc_get_chip_data(desc);
 	rp = &pcie->rp;
 	mask = 1 << ((data->hwirq + PAB_INTX_START) - 1);
 	raw_spin_lock_irqsave(&rp->intx_mask_lock, flags);