dmaengine: ipu: Consolidate duplicated irq handlers

The functions irq_irq_err and ipu_irq_fn are identical plus/minus the
comments. Remove one.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: dmaengine@vger.kernel.org
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/ipu/ipu_irq.c

@@ -265,8 +265,8 @@ int ipu_irq_unmap(unsigned int source)
 	return ret;
 }
 
-/* Chained IRQ handler for IPU error interrupt */
-static void ipu_irq_err(unsigned int __irq, struct irq_desc *desc)
+/* Chained IRQ handler for IPU function and error interrupt */
+static void ipu_irq_handler(unsigned int __irq, struct irq_desc *desc)
 {
 	struct ipu *ipu = irq_desc_get_handler_data(desc);
 	u32 status;
@@ -307,44 +307,6 @@ static void ipu_irq_err(unsigned int __irq, struct irq_desc *desc)
 	}
 }
 
-/* Chained IRQ handler for IPU function interrupt */
-static void ipu_irq_fn(unsigned int __irq, struct irq_desc *desc)
-{
-	struct ipu *ipu = irq_desc_get_handler_data(desc);
-	u32 status;
-	int i, line;
-
-	for (i = 0; i < IPU_IRQ_NR_FN_BANKS; i++) {
-		struct ipu_irq_bank *bank = irq_bank + i;
-
-		raw_spin_lock(&bank_lock);
-		status = ipu_read_reg(ipu, bank->status);
-		/* Not clearing all interrupts, see above */
-		status &= ipu_read_reg(ipu, bank->control);
-		raw_spin_unlock(&bank_lock);
-		while ((line = ffs(status))) {
-			struct ipu_irq_map *map;
-			unsigned int irq;
-
-			line--;
-			status &= ~(1UL << line);
-
-			raw_spin_lock(&bank_lock);
-			map = src2map(32 * i + line);
-			if (map)
-				irq = map->irq;
-			raw_spin_unlock(&bank_lock);
-
-			if (!map) {
-				pr_err("IPU: Interrupt on unmapped source %u bank %d\n",
-				       line, i);
-				continue;
-			}
-			generic_handle_irq(irq);
-		}
-	}
-}
-
 static struct irq_chip ipu_irq_chip = {
 	.name		= "ipu_irq",
 	.irq_ack	= ipu_irq_ack,
@@ -384,9 +346,9 @@ int __init ipu_irq_attach_irq(struct ipu *ipu, struct platform_device *dev)
 #endif
 	}
 
-	irq_set_chained_handler_and_data(ipu->irq_fn, ipu_irq_fn, ipu);
+	irq_set_chained_handler_and_data(ipu->irq_fn, ipu_irq_handler, ipu);
 
-	irq_set_chained_handler_and_data(ipu->irq_err, ipu_irq_err, ipu);
+	irq_set_chained_handler_and_data(ipu->irq_err, ipu_irq_handler, ipu);
 
 	ipu->irq_base = irq_base;