soc: fsl: qe: don't use NO_IRQ in qe_ic.c

This driver is currently PPC-only, and on powerpc, NO_IRQ is 0, so
this doesn't change functionality. However, not every architecture
defines NO_IRQ, and some define it as -1, so the detection of a failed
irq_of_parse_and_map() (which returns 0 on failure) would be wrong on
those. So to prepare for allowing this driver to build on other
architectures, drop all references to NO_IRQ.

Reviewed-by: Timur Tabi <timur@kernel.org>
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Li Yang <leoyang.li@nxp.com>

diff --git a/drivers/soc/fsl/qe/qe_ic.c b/drivers/soc/fsl/qe/qe_ic.c
index 4839dcd..8f74bc6 100644 (file)
--- a/drivers/soc/fsl/qe/qe_ic.c
+++ b/drivers/soc/fsl/qe/qe_ic.c
@@ -282,7 +282,7 @@ static const struct irq_domain_ops qe_ic_host_ops = {
        .xlate = irq_domain_xlate_onetwocell,
 };
 
-/* Return an interrupt vector or NO_IRQ if no interrupt is pending. */
+/* Return an interrupt vector or 0 if no interrupt is pending. */
 unsigned int qe_ic_get_low_irq(struct qe_ic *qe_ic)
 {
        int irq;
@@ -293,12 +293,12 @@ unsigned int qe_ic_get_low_irq(struct qe_ic *qe_ic)
        irq = qe_ic_read(qe_ic->regs, QEIC_CIVEC) >> 26;
 
        if (irq == 0)
-               return NO_IRQ;
+               return 0;
 
        return irq_linear_revmap(qe_ic->irqhost, irq);
 }
 
-/* Return an interrupt vector or NO_IRQ if no interrupt is pending. */
+/* Return an interrupt vector or 0 if no interrupt is pending. */
 unsigned int qe_ic_get_high_irq(struct qe_ic *qe_ic)
 {
        int irq;
@@ -309,7 +309,7 @@ unsigned int qe_ic_get_high_irq(struct qe_ic *qe_ic)
        irq = qe_ic_read(qe_ic->regs, QEIC_CHIVEC) >> 26;
 
        if (irq == 0)
-               return NO_IRQ;
+               return 0;
 
        return irq_linear_revmap(qe_ic->irqhost, irq);
 }
@@ -320,7 +320,7 @@ static void qe_ic_cascade_low(struct irq_desc *desc)
        unsigned int cascade_irq = qe_ic_get_low_irq(qe_ic);
        struct irq_chip *chip = irq_desc_get_chip(desc);
 
-       if (cascade_irq != NO_IRQ)
+       if (cascade_irq != 0)
                generic_handle_irq(cascade_irq);
 
        if (chip->irq_eoi)
@@ -333,7 +333,7 @@ static void qe_ic_cascade_high(struct irq_desc *desc)
        unsigned int cascade_irq = qe_ic_get_high_irq(qe_ic);
        struct irq_chip *chip = irq_desc_get_chip(desc);
 
-       if (cascade_irq != NO_IRQ)
+       if (cascade_irq != 0)
                generic_handle_irq(cascade_irq);
 
        if (chip->irq_eoi)
@@ -347,10 +347,10 @@ static void qe_ic_cascade_muxed_mpic(struct irq_desc *desc)
        struct irq_chip *chip = irq_desc_get_chip(desc);
 
        cascade_irq = qe_ic_get_high_irq(qe_ic);
-       if (cascade_irq == NO_IRQ)
+       if (cascade_irq == 0)
                cascade_irq = qe_ic_get_low_irq(qe_ic);
 
-       if (cascade_irq != NO_IRQ)
+       if (cascade_irq != 0)
                generic_handle_irq(cascade_irq);
 
        chip->irq_eoi(&desc->irq_data);
@@ -386,7 +386,7 @@ static void __init qe_ic_init(struct device_node *node, unsigned int flags)
        qe_ic->virq_high = irq_of_parse_and_map(node, 0);
        qe_ic->virq_low = irq_of_parse_and_map(node, 1);
 
-       if (qe_ic->virq_low == NO_IRQ) {
+       if (!qe_ic->virq_low) {
                printk(KERN_ERR "Failed to map QE_IC low IRQ\n");
                kfree(qe_ic);
                return;
@@ -423,8 +423,7 @@ static void __init qe_ic_init(struct device_node *node, unsigned int flags)
        irq_set_handler_data(qe_ic->virq_low, qe_ic);
        irq_set_chained_handler(qe_ic->virq_low, low_handler);
 
-       if (qe_ic->virq_high != NO_IRQ &&
-                       qe_ic->virq_high != qe_ic->virq_low) {
+       if (qe_ic->virq_high && qe_ic->virq_high != qe_ic->virq_low) {
                irq_set_handler_data(qe_ic->virq_high, qe_ic);
                irq_set_chained_handler(qe_ic->virq_high, high_handler);
        }