pci: pcie-designware: Remove irq_desc abuse

There is no reason to care about irq_desc in that context, escpecially
as irq_data for that interrupt is retrieved as well.

Use the proper accessor for the msi descriptor

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Cc: Mohit Kumar <mohit.kumar@st.com>
Cc: pci <linux-pci@vger.kernel.org>
Link: http://lkml.kernel.org/r/20140223212736.987803648@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
(cherry picked from commit f7bfca6db60a6ca0a73126918b2fb6f851065947)

diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c
index f173dd09fce4a4db263c1ad97c62048972f06399..6eca144752ef782fa757092c6d4516cf2da31383 100644 (file)
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -294,14 +294,12 @@ no_valid_irq:
 static void clear_irq(unsigned int irq)
 {
        unsigned int pos, nvec;
-       struct irq_desc *desc;
        struct msi_desc *msi;
        struct pcie_port *pp;
        struct irq_data *data = irq_get_irq_data(irq);
 
        /* get the port structure */
-       desc = irq_to_desc(irq);
-       msi = irq_desc_get_msi_desc(desc);
+       msi = irq_data_get_msi(data);
        pp = sys_to_pcie(msi->dev->bus->sysdata);
        if (!pp) {
                BUG();