mfd: ezx-pcap: Remvove open coded irq handling

There is no point in checking irq_desc here, as it _is_ available. The
driver configured those lines, so they cannot go away.

The home brewn disabled/note_interrupt magic can be removed as well by
adding a irq_disable callback which avoids the lazy disable.

That driver needs to be converted to threaded interrupts.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 3 insertions, 11 deletions

diff --git a/drivers/mfd/ezx-pcap.c b/drivers/mfd/ezx-pcap.c
index 9e2d8dd5f9e5..92e6fbc43a14 100644
--- a/drivers/mfd/ezx-pcap.c
+++ b/drivers/mfd/ezx-pcap.c
@@ -162,6 +162,7 @@ static void pcap_unmask_irq(struct irq_data *d)
 
 static struct irq_chip pcap_irq_chip = {
         .name           = "pcap",
+        .irq_disable    = pcap_mask_irq,
         .irq_mask       = pcap_mask_irq,
         .irq_unmask     = pcap_unmask_irq,
 };
@@ -196,17 +197,8 @@ static void pcap_isr_work(struct work_struct *work)
                 local_irq_disable();
                 service = isr & ~msr;
                 for (irq = pcap->irq_base; service; service >>= 1, irq++) {
-                        if (service & 1) {
-                                struct irq_desc *desc = irq_to_desc(irq);
-
-                                if (WARN(!desc, "Invalid PCAP IRQ %d\n", irq))
-                                        break;
-
-                                if (desc->status & IRQ_DISABLED)
-                                        note_interrupt(irq, desc, IRQ_NONE);
-                                else
-                                        desc->handle_irq(irq, desc);
-                        }
+                        if (service & 1)
+                                generic_handle_irq(irq);
                 }
                 local_irq_enable();
                 ezx_pcap_write(pcap, PCAP_REG_MSR, pcap->msr);