[tip: irq/core] PCI: mobiveil: Use irq_data_get_irq_chip_data()

[tip-bot2 for Thomas Gleixner]

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     c9bfac576ac620b71f42fb695493d6eb6e382637
Gitweb:        https://git.kernel.org/tip/c9bfac576ac620b71f42fb695493d6eb6e382637
Author:        Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate:    Thu, 10 Dec 2020 20:25:55 +01:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Sat, 12 Dec 2020 12:59:05 +01:00

PCI: mobiveil: Use irq_data_get_irq_chip_data()

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@xxxxxxxxxxxxx>
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20201210194044.473308721@xxxxxxxxxxxxx

---
 drivers/pci/controller/mobiveil/pcie-mobiveil-host.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
index a2632d0..c637de3 100644
--- 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_pcie *pcie, bool reinit)
 
 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(struct irq_data *data)
 
 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);