[POWERPC] Provide a default irq_host match, which matches on an exact of_node

The most common match semantic is an exact match based on the device node.
So provide a default implementation that does this, and hook it up if no
match routine is specified.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

11 files changed, 9 insertions, 62 deletions

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 30fb8e2c5c9d..d5c7e4cf2b39 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -418,6 +418,11 @@ irq_hw_number_t virq_to_hw(unsigned int virq)
 }
 EXPORT_SYMBOL_GPL(virq_to_hw);
 
+static int default_irq_host_match(struct irq_host *h, struct device_node *np)
+{
+        return h->of_node != NULL && h->of_node == np;
+}
+
 __init_refok struct irq_host *irq_alloc_host(struct device_node *of_node,
                                 unsigned int revmap_type,
                                 unsigned int revmap_arg,
@@ -449,6 +454,9 @@ __init_refok struct irq_host *irq_alloc_host(struct device_node *of_node,
         host->ops = ops;
         host->of_node = of_node;
 
+        if (host->ops->match == NULL)
+                host->ops->match = default_irq_host_match;
+
         spin_lock_irqsave(&irq_big_lock, flags);
 
         /* If it's a legacy controller, check for duplicates and
@@ -523,7 +531,7 @@ struct irq_host *irq_find_host(struct device_node *node)
          */
         spin_lock_irqsave(&irq_big_lock, flags);
         list_for_each_entry(h, &irq_hosts, link)
-                if (h->ops->match != NULL && h->ops->match(h, node)) {
+                if (h->ops->match(h, node)) {
                         found = h;
                         break;
                 }
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_pic.c b/arch/powerpc/platforms/52xx/mpc52xx_pic.c
index 1d793e4b8d56..0f4ca8a2b777 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_pic.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_pic.c
@@ -241,12 +241,6 @@ static struct irq_chip mpc52xx_sdma_irqchip = {
  * irq_host
 */
 
-static int mpc52xx_irqhost_match(struct irq_host *h, struct device_node *node)
-{
-        pr_debug("%s: node=%p\n", __func__, node);
-        return h->of_node == node;
-}
-
 static int mpc52xx_irqhost_xlate(struct irq_host *h, struct device_node *ct,
                                  u32 * intspec, unsigned int intsize,
                                  irq_hw_number_t * out_hwirq,
@@ -367,7 +361,6 @@ static int mpc52xx_irqhost_map(struct irq_host *h, unsigned int virq,
 }
 
 static struct irq_host_ops mpc52xx_irqhost_ops = {
-        .match = mpc52xx_irqhost_match,
         .xlate = mpc52xx_irqhost_xlate,
         .map = mpc52xx_irqhost_map,
 };
diff --git a/arch/powerpc/platforms/82xx/mpc82xx_ads.c b/arch/powerpc/platforms/82xx/mpc82xx_ads.c
index 91ddbd2f477d..40087952935a 100644
--- a/arch/powerpc/platforms/82xx/mpc82xx_ads.c
+++ b/arch/powerpc/platforms/82xx/mpc82xx_ads.c
@@ -398,11 +398,6 @@ m82xx_pci_irq_demux(unsigned int irq, struct irq_desc *desc)
         }
 }
 
-static int pci_pic_host_match(struct irq_host *h, struct device_node *node)
-{
-        return h->of_node == node;
-}
-
 static int pci_pic_host_map(struct irq_host *h, unsigned int virq,
                             irq_hw_number_t hw)
 {
@@ -418,7 +413,6 @@ static void pci_host_unmap(struct irq_host *h, unsigned int virq)
 }
 
 static struct irq_host_ops pci_pic_host_ops = {
-        .match = pci_pic_host_match,
         .map = pci_pic_host_map,
         .unmap = pci_host_unmap,
 };
diff --git a/arch/powerpc/platforms/cell/axon_msi.c b/arch/powerpc/platforms/cell/axon_msi.c
index bdd97bb2446d..74407afddf46 100644
--- a/arch/powerpc/platforms/cell/axon_msi.c
+++ b/arch/powerpc/platforms/cell/axon_msi.c
@@ -294,13 +294,7 @@ static int msic_host_map(struct irq_host *h, unsigned int virq,
         return 0;
 }
 
-static int msic_host_match(struct irq_host *host, struct device_node *dn)
-{
-        return host->of_node == dn;
-}
-
 static struct irq_host_ops msic_host_ops = {
-        .match  = msic_host_match,
         .map    = msic_host_map,
 };
 
diff --git a/arch/powerpc/platforms/cell/spider-pic.c b/arch/powerpc/platforms/cell/spider-pic.c
index 4309c2cbbeb9..3f4b4aef756d 100644
--- a/arch/powerpc/platforms/cell/spider-pic.c
+++ b/arch/powerpc/platforms/cell/spider-pic.c
@@ -175,11 +175,6 @@ static struct irq_chip spider_pic = {
         .set_type = spider_set_irq_type,
 };
 
-static int spider_host_match(struct irq_host *h, struct device_node *node)
-{
-        return h->of_node == node;
-}
-
 static int spider_host_map(struct irq_host *h, unsigned int virq,
                         irq_hw_number_t hw)
 {
@@ -206,7 +201,6 @@ static int spider_host_xlate(struct irq_host *h, struct device_node *ct,
 }
 
 static struct irq_host_ops spider_host_ops = {
-        .match = spider_host_match,
         .map = spider_host_map,
         .xlate = spider_host_xlate,
 };
diff --git a/arch/powerpc/sysdev/commproc.c b/arch/powerpc/sysdev/commproc.c
index 05dc30b80e29..b562afc4e50c 100644
--- a/arch/powerpc/sysdev/commproc.c
+++ b/arch/powerpc/sysdev/commproc.c
@@ -94,11 +94,6 @@ int cpm_get_irq(void)
         return irq_linear_revmap(cpm_pic_host, cpm_vec);
 }
 
-static int cpm_pic_host_match(struct irq_host *h, struct device_node *node)
-{
-        return h->of_node == node;
-}
-
 static int cpm_pic_host_map(struct irq_host *h, unsigned int virq,
                           irq_hw_number_t hw)
 {
@@ -126,7 +121,6 @@ static struct irqaction cpm_error_irqaction = {
 };
 
 static struct irq_host_ops cpm_pic_host_ops = {
-        .match = cpm_pic_host_match,
         .map = cpm_pic_host_map,
 };
 
diff --git a/arch/powerpc/sysdev/cpm2_pic.c b/arch/powerpc/sysdev/cpm2_pic.c
index d9ab30c66ebf..d5b36e0ecbda 100644
--- a/arch/powerpc/sysdev/cpm2_pic.c
+++ b/arch/powerpc/sysdev/cpm2_pic.c
@@ -205,11 +205,6 @@ unsigned int cpm2_get_irq(void)
         return irq_linear_revmap(cpm2_pic_host, irq);
 }
 
-static int cpm2_pic_host_match(struct irq_host *h, struct device_node *node)
-{
-        return h->of_node == node;
-}
-
 static int cpm2_pic_host_map(struct irq_host *h, unsigned int virq,
                           irq_hw_number_t hw)
 {
@@ -233,7 +228,6 @@ static int cpm2_pic_host_xlate(struct irq_host *h, struct device_node *ct,
 }
 
 static struct irq_host_ops cpm2_pic_host_ops = {
-        .match = cpm2_pic_host_match,
         .map = cpm2_pic_host_map,
         .xlate = cpm2_pic_host_xlate,
 };
diff --git a/arch/powerpc/sysdev/mpc8xx_pic.c b/arch/powerpc/sysdev/mpc8xx_pic.c
index f20a4d43d104..565156ae65bc 100644
--- a/arch/powerpc/sysdev/mpc8xx_pic.c
+++ b/arch/powerpc/sysdev/mpc8xx_pic.c
@@ -119,11 +119,6 @@ unsigned int mpc8xx_get_irq(void)
 
 }
 
-static int mpc8xx_pic_host_match(struct irq_host *h, struct device_node *node)
-{
-        return h->of_node == node;
-}
-
 static int mpc8xx_pic_host_map(struct irq_host *h, unsigned int virq,
                           irq_hw_number_t hw)
 {
@@ -157,7 +152,6 @@ static int mpc8xx_pic_host_xlate(struct irq_host *h, struct device_node *ct,
 
 
 static struct irq_host_ops mpc8xx_pic_host_ops = {
-        .match = mpc8xx_pic_host_match,
         .map = mpc8xx_pic_host_map,
         .xlate = mpc8xx_pic_host_xlate,
 };
diff --git a/arch/powerpc/sysdev/mv64x60_pic.c b/arch/powerpc/sysdev/mv64x60_pic.c
index a145bfd003c7..19e6ef263797 100644
--- a/arch/powerpc/sysdev/mv64x60_pic.c
+++ b/arch/powerpc/sysdev/mv64x60_pic.c
@@ -202,11 +202,6 @@ static struct irq_chip mv64x60_chip_gpp = {
  * mv64x60_host_ops functions
  */
 
-static int mv64x60_host_match(struct irq_host *h, struct device_node *np)
-{
-        return h->of_node == np;
-}
-
 static struct irq_chip *mv64x60_chips[] = {
         [MV64x60_LEVEL1_LOW]  = &mv64x60_chip_low,
         [MV64x60_LEVEL1_HIGH] = &mv64x60_chip_high,
@@ -228,7 +223,6 @@ static int mv64x60_host_map(struct irq_host *h, unsigned int virq,
 }
 
 static struct irq_host_ops mv64x60_host_ops = {
-        .match = mv64x60_host_match,
         .map   = mv64x60_host_map,
 };
 
diff --git a/arch/powerpc/sysdev/tsi108_pci.c b/arch/powerpc/sysdev/tsi108_pci.c
index b41492a8d600..31d3d33d91fc 100644
--- a/arch/powerpc/sysdev/tsi108_pci.c
+++ b/arch/powerpc/sysdev/tsi108_pci.c
@@ -404,13 +404,7 @@ static int pci_irq_host_map(struct irq_host *h, unsigned int virq,
         return 0;
 }
 
-static int pci_irq_host_match(struct irq_host *h, struct device_node *node)
-{
-        return h->of_node == node;
-}
-
 static struct irq_host_ops pci_irq_host_ops = {
-        .match = pci_irq_host_match,
         .map = pci_irq_host_map,
         .xlate = pci_irq_host_xlate,
 };
diff --git a/arch/powerpc/sysdev/uic.c b/arch/powerpc/sysdev/uic.c
index bf3766754173..5149716c734d 100644
--- a/arch/powerpc/sysdev/uic.c
+++ b/arch/powerpc/sysdev/uic.c
@@ -215,11 +215,6 @@ out_unlock:
         spin_unlock(&desc->lock);
 }
 
-static int uic_host_match(struct irq_host *h, struct device_node *node)
-{
-        return h->of_node == node;
-}
-
 static int uic_host_map(struct irq_host *h, unsigned int virq,
                         irq_hw_number_t hw)
 {
@@ -249,7 +244,6 @@ static int uic_host_xlate(struct irq_host *h, struct device_node *ct,
 }
 
 static struct irq_host_ops uic_host_ops = {
-        .match  = uic_host_match,
         .map    = uic_host_map,
         .xlate  = uic_host_xlate,
 };