[POWERPC] Add an optional device_node pointer to the irq_host

The majority of irq_host implementations (3 out of 4) are associated
with a device_node, and need to stash it somewhere. Rather than having
it somewhere different for each host, add an optional device_node pointer
to the irq_host structure.

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

13 files changed, 41 insertions, 66 deletions

diff --git a/arch/powerpc/sysdev/commproc.c b/arch/powerpc/sysdev/commproc.c
index e8e79f83d198..05dc30b80e29 100644
--- a/arch/powerpc/sysdev/commproc.c
+++ b/arch/powerpc/sysdev/commproc.c
@@ -50,7 +50,6 @@ static uint host_end;    /* end + 1 */
 cpm8xx_t *cpmp;          /* Pointer to comm processor space */
 cpic8xx_t *cpic_reg;
 
-static struct device_node *cpm_pic_node;
 static struct irq_host *cpm_pic_host;
 
 static void cpm_mask_irq(unsigned int irq)
@@ -97,7 +96,7 @@ int cpm_get_irq(void)
 
 static int cpm_pic_host_match(struct irq_host *h, struct device_node *node)
 {
-	return cpm_pic_node == node;
+	return h->of_node == node;
 }
 
 static int cpm_pic_host_map(struct irq_host *h, unsigned int virq,
@@ -165,9 +164,8 @@ unsigned int cpm_pic_init(void)
 
 	out_be32(&cpic_reg->cpic_cimr, 0);
 
-	cpm_pic_node = of_node_get(np);
-
-	cpm_pic_host = irq_alloc_host(IRQ_HOST_MAP_LINEAR, 64, &cpm_pic_host_ops, 64);
+	cpm_pic_host = irq_alloc_host(of_node_get(np), IRQ_HOST_MAP_LINEAR,
+				      64, &cpm_pic_host_ops, 64);
 	if (cpm_pic_host == NULL) {
 		printk(KERN_ERR "CPM2 PIC: failed to allocate irq host!\n");
 		sirq = NO_IRQ;
diff --git a/arch/powerpc/sysdev/cpm2_pic.c b/arch/powerpc/sysdev/cpm2_pic.c
index eabfe06fe05c..d9ab30c66ebf 100644
--- a/arch/powerpc/sysdev/cpm2_pic.c
+++ b/arch/powerpc/sysdev/cpm2_pic.c
@@ -50,7 +50,6 @@
 
 static intctl_cpm2_t *cpm2_intctl;
 
-static struct device_node *cpm2_pic_node;
 static struct irq_host *cpm2_pic_host;
 #define NR_MASK_WORDS   ((NR_IRQS + 31) / 32)
 static unsigned long ppc_cached_irq_mask[NR_MASK_WORDS];
@@ -208,7 +207,7 @@ unsigned int cpm2_get_irq(void)
 
 static int cpm2_pic_host_match(struct irq_host *h, struct device_node *node)
 {
-	return cpm2_pic_node == node;
+	return h->of_node == node;
 }
 
 static int cpm2_pic_host_map(struct irq_host *h, unsigned int virq,
@@ -273,8 +272,8 @@ void cpm2_pic_init(struct device_node *node)
 	out_be32(&cpm2_intctl->ic_scprrl, 0x05309770);
 
 	/* create a legacy host */
-	cpm2_pic_node = of_node_get(node);
-	cpm2_pic_host = irq_alloc_host(IRQ_HOST_MAP_LINEAR, 64, &cpm2_pic_host_ops, 64);
+	cpm2_pic_host = irq_alloc_host(of_node_get(node), IRQ_HOST_MAP_LINEAR,
+				       64, &cpm2_pic_host_ops, 64);
 	if (cpm2_pic_host == NULL) {
 		printk(KERN_ERR "CPM2 PIC: failed to allocate irq host!\n");
 		return;
diff --git a/arch/powerpc/sysdev/i8259.c b/arch/powerpc/sysdev/i8259.c
index ad87adc975bc..7c1b27ac7d3c 100644
--- a/arch/powerpc/sysdev/i8259.c
+++ b/arch/powerpc/sysdev/i8259.c
@@ -25,7 +25,6 @@ static unsigned char cached_8259[2] = { 0xff, 0xff };
 
 static DEFINE_SPINLOCK(i8259_lock);
 
-static struct device_node *i8259_node;
 static struct irq_host *i8259_host;
 
 /*
@@ -165,7 +164,7 @@ static struct resource pic_edgectrl_iores = {
 
 static int i8259_host_match(struct irq_host *h, struct device_node *node)
 {
-	return i8259_node == NULL || i8259_node == node;
+	return h->of_node == NULL || h->of_node == node;
 }
 
 static int i8259_host_map(struct irq_host *h, unsigned int virq,
@@ -276,9 +275,8 @@ void i8259_init(struct device_node *node, unsigned long intack_addr)
 	spin_unlock_irqrestore(&i8259_lock, flags);
 
 	/* create a legacy host */
-	if (node)
-		i8259_node = of_node_get(node);
-	i8259_host = irq_alloc_host(IRQ_HOST_MAP_LEGACY, 0, &i8259_host_ops, 0);
+	i8259_host = irq_alloc_host(of_node_get(node), IRQ_HOST_MAP_LEGACY,
+				    0, &i8259_host_ops, 0);
 	if (i8259_host == NULL) {
 		printk(KERN_ERR "i8259: failed to allocate irq host !\n");
 		return;
diff --git a/arch/powerpc/sysdev/ipic.c b/arch/powerpc/sysdev/ipic.c
index 473c415e9e25..05a56e55804c 100644
--- a/arch/powerpc/sysdev/ipic.c
+++ b/arch/powerpc/sysdev/ipic.c
@@ -511,10 +511,8 @@ static struct irq_chip ipic_irq_chip = {
 
 static int ipic_host_match(struct irq_host *h, struct device_node *node)
 {
-	struct ipic *ipic = h->host_data;
-
 	/* Exact match, unless ipic node is NULL */
-	return ipic->of_node == NULL || ipic->of_node == node;
+	return h->of_node == NULL || h->of_node == node;
 }
 
 static int ipic_host_map(struct irq_host *h, unsigned int virq,
@@ -568,9 +566,8 @@ struct ipic * __init ipic_init(struct device_node *node, unsigned int flags)
 		return NULL;
 
 	memset(ipic, 0, sizeof(struct ipic));
-	ipic->of_node = of_node_get(node);
 
-	ipic->irqhost = irq_alloc_host(IRQ_HOST_MAP_LINEAR,
+	ipic->irqhost = irq_alloc_host(of_node_get(node), IRQ_HOST_MAP_LINEAR,
 				       NR_IPIC_INTS,
 				       &ipic_host_ops, 0);
 	if (ipic->irqhost == NULL) {
diff --git a/arch/powerpc/sysdev/ipic.h b/arch/powerpc/sysdev/ipic.h
index c28e589877eb..bb309a501b2d 100644
--- a/arch/powerpc/sysdev/ipic.h
+++ b/arch/powerpc/sysdev/ipic.h
@@ -48,9 +48,6 @@ struct ipic {
 
 	/* The "linux" controller struct */
 	struct irq_chip		hc_irq;
-
-	/* The device node of the interrupt controller */
-	struct device_node	*of_node;
 };
 
 struct ipic_info {
diff --git a/arch/powerpc/sysdev/mpc8xx_pic.c b/arch/powerpc/sysdev/mpc8xx_pic.c
index 2fc2bcd79b5e..f20a4d43d104 100644
--- a/arch/powerpc/sysdev/mpc8xx_pic.c
+++ b/arch/powerpc/sysdev/mpc8xx_pic.c
@@ -19,7 +19,6 @@
 
 extern int cpm_get_irq(struct pt_regs *regs);
 
-static struct device_node *mpc8xx_pic_node;
 static struct irq_host *mpc8xx_pic_host;
 #define NR_MASK_WORDS   ((NR_IRQS + 31) / 32)
 static unsigned long ppc_cached_irq_mask[NR_MASK_WORDS];
@@ -122,7 +121,7 @@ unsigned int mpc8xx_get_irq(void)
 
 static int mpc8xx_pic_host_match(struct irq_host *h, struct device_node *node)
 {
-	return mpc8xx_pic_node == node;
+	return h->of_node == node;
 }
 
 static int mpc8xx_pic_host_map(struct irq_host *h, unsigned int virq,
@@ -176,22 +175,24 @@ int mpc8xx_pic_init(void)
 		return -ENOMEM;
 	}
 
-	mpc8xx_pic_node = of_node_get(np);
-
 	ret = of_address_to_resource(np, 0, &res);
-	of_node_put(np);
 	if (ret)
-		return ret;
+		goto out;
 
 	siu_reg = (void *)ioremap(res.start, res.end - res.start + 1);
-	if (siu_reg == NULL)
-		return -EINVAL;
+	if (siu_reg == NULL) {
+		ret = -EINVAL;
+		goto out;
+	}
 
-	mpc8xx_pic_host = irq_alloc_host(IRQ_HOST_MAP_LINEAR, 64, &mpc8xx_pic_host_ops, 64);
+	mpc8xx_pic_host = irq_alloc_host(of_node_get(np), IRQ_HOST_MAP_LINEAR,
+					 64, &mpc8xx_pic_host_ops, 64);
 	if (mpc8xx_pic_host == NULL) {
 		printk(KERN_ERR "MPC8xx PIC: failed to allocate irq host!\n");
 		ret = -ENOMEM;
 	}
 
+out:
+	of_node_put(np);
 	return ret;
 }
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 74c64c0d3b71..25a81f73cecf 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -271,7 +271,7 @@ static void _mpic_map_dcr(struct mpic *mpic, struct mpic_reg_bank *rb,
 {
 	rb->dbase = mpic->dcr_base;
 	rb->doff = offset;
-	rb->dhost = dcr_map(mpic->of_node, rb->dbase + rb->doff, size);
+	rb->dhost = dcr_map(mpic->irqhost->of_node, rb->dbase + rb->doff, size);
 	BUG_ON(!DCR_MAP_OK(rb->dhost));
 }
 
@@ -861,10 +861,8 @@ static struct irq_chip mpic_irq_ht_chip = {
 
 static int mpic_host_match(struct irq_host *h, struct device_node *node)
 {
-	struct mpic *mpic = h->host_data;
-
 	/* Exact match, unless mpic node is NULL */
-	return mpic->of_node == NULL || mpic->of_node == node;
+	return h->of_node == NULL || h->of_node == node;
 }
 
 static int mpic_host_map(struct irq_host *h, unsigned int virq,
@@ -985,10 +983,9 @@ struct mpic * __init mpic_alloc(struct device_node *node,
 	
 	memset(mpic, 0, sizeof(struct mpic));
 	mpic->name = name;
-	mpic->of_node = of_node_get(node);
 
-	mpic->irqhost = irq_alloc_host(IRQ_HOST_MAP_LINEAR, isu_size,
-				       &mpic_host_ops,
+	mpic->irqhost = irq_alloc_host(of_node_get(node), IRQ_HOST_MAP_LINEAR,
+				       isu_size, &mpic_host_ops,
 				       flags & MPIC_LARGE_VECTORS ? 2048 : 256);
 	if (mpic->irqhost == NULL) {
 		of_node_put(node);
diff --git a/arch/powerpc/sysdev/mpic_msi.c b/arch/powerpc/sysdev/mpic_msi.c
index b076793033c2..9ca4d8f444ff 100644
--- a/arch/powerpc/sysdev/mpic_msi.c
+++ b/arch/powerpc/sysdev/mpic_msi.c
@@ -117,16 +117,17 @@ static int mpic_msi_reserve_dt_hwirqs(struct mpic *mpic)
 	int i, len;
 	const u32 *p;
 
-	p = of_get_property(mpic->of_node, "msi-available-ranges", &len);
+	p = of_get_property(mpic->irqhost->of_node,
+			    "msi-available-ranges", &len);
 	if (!p) {
 		pr_debug("mpic: no msi-available-ranges property found on %s\n",
-			  mpic->of_node->full_name);
+			  mpic->irqhost->of_node->full_name);
 		return -ENODEV;
 	}
 
 	if (len % 8 != 0) {
 		printk(KERN_WARNING "mpic: Malformed msi-available-ranges "
-		       "property on %s\n", mpic->of_node->full_name);
+		       "property on %s\n", mpic->irqhost->of_node->full_name);
 		return -EINVAL;
 	}
 
diff --git a/arch/powerpc/sysdev/mv64x60_pic.c b/arch/powerpc/sysdev/mv64x60_pic.c
index 01d316287772..a145bfd003c7 100644
--- a/arch/powerpc/sysdev/mv64x60_pic.c
+++ b/arch/powerpc/sysdev/mv64x60_pic.c
@@ -204,7 +204,7 @@ static struct irq_chip mv64x60_chip_gpp = {
 
 static int mv64x60_host_match(struct irq_host *h, struct device_node *np)
 {
-	return mv64x60_irq_host->host_data == np;
+	return h->of_node == np;
 }
 
 static struct irq_chip *mv64x60_chips[] = {
@@ -253,14 +253,12 @@ void __init mv64x60_init_irq(void)
 	np = of_find_compatible_node(NULL, NULL, "marvell,mv64x60-pic");
 	reg = of_get_property(np, "reg", &size);
 	paddr = of_translate_address(np, reg);
-	of_node_put(np);
 	mv64x60_irq_reg_base = ioremap(paddr, reg[1]);
 
-	mv64x60_irq_host = irq_alloc_host(IRQ_HOST_MAP_LINEAR, MV64x60_NUM_IRQS,
+	mv64x60_irq_host = irq_alloc_host(np, IRQ_HOST_MAP_LINEAR,
+					  MV64x60_NUM_IRQS,
 					  &mv64x60_host_ops, MV64x60_NUM_IRQS);
 
-	mv64x60_irq_host->host_data = np;
-
 	spin_lock_irqsave(&mv64x60_lock, flags);
 	out_le32(mv64x60_gpp_reg_base + MV64x60_GPP_INTR_MASK,
 		 mv64x60_cached_gpp_mask);
diff --git a/arch/powerpc/sysdev/qe_lib/qe_ic.c b/arch/powerpc/sysdev/qe_lib/qe_ic.c
index 4d1dcb45963d..55e6f394af82 100644
--- a/arch/powerpc/sysdev/qe_lib/qe_ic.c
+++ b/arch/powerpc/sysdev/qe_lib/qe_ic.c
@@ -245,10 +245,8 @@ static struct irq_chip qe_ic_irq_chip = {
 
 static int qe_ic_host_match(struct irq_host *h, struct device_node *node)
 {
-	struct qe_ic *qe_ic = h->host_data;
-
 	/* Exact match, unless qe_ic node is NULL */
-	return qe_ic->of_node == NULL || qe_ic->of_node == node;
+	return h->of_node == NULL || h->of_node == node;
 }
 
 static int qe_ic_host_map(struct irq_host *h, unsigned int virq,
@@ -352,9 +350,8 @@ void __init qe_ic_init(struct device_node *node, unsigned int flags)
 		return;
 
 	memset(qe_ic, 0, sizeof(struct qe_ic));
-	qe_ic->of_node = of_node_get(node);
 
-	qe_ic->irqhost = irq_alloc_host(IRQ_HOST_MAP_LINEAR,
+	qe_ic->irqhost = irq_alloc_host(of_node_get(node), IRQ_HOST_MAP_LINEAR,
 					NR_QE_IC_INTS, &qe_ic_host_ops, 0);
 	if (qe_ic->irqhost == NULL) {
 		of_node_put(node);
diff --git a/arch/powerpc/sysdev/qe_lib/qe_ic.h b/arch/powerpc/sysdev/qe_lib/qe_ic.h
index 9a631adb189d..c1361d005a8a 100644
--- a/arch/powerpc/sysdev/qe_lib/qe_ic.h
+++ b/arch/powerpc/sysdev/qe_lib/qe_ic.h
@@ -84,9 +84,6 @@ struct qe_ic {
 	/* The "linux" controller struct */
 	struct irq_chip hc_irq;
 
-	/* The device node of the interrupt controller */
-	struct device_node *of_node;
-
 	/* VIRQ numbers of QE high/low irqs */
 	unsigned int virq_high;
 	unsigned int virq_low;
diff --git a/arch/powerpc/sysdev/tsi108_pci.c b/arch/powerpc/sysdev/tsi108_pci.c
index cf0bfbd73401..b41492a8d600 100644
--- a/arch/powerpc/sysdev/tsi108_pci.c
+++ b/arch/powerpc/sysdev/tsi108_pci.c
@@ -52,7 +52,6 @@
 u32 tsi108_pci_cfg_base;
 static u32 tsi108_pci_cfg_phys;
 u32 tsi108_csr_vir_base;
-static struct device_node *pci_irq_node;
 static struct irq_host *pci_irq_host;
 
 extern u32 get_vir_csrbase(void);
@@ -407,7 +406,7 @@ static int pci_irq_host_map(struct irq_host *h, unsigned int virq,
 
 static int pci_irq_host_match(struct irq_host *h, struct device_node *node)
 {
-	return pci_irq_node == node;
+	return h->of_node == node;
 }
 
 static struct irq_host_ops pci_irq_host_ops = {
@@ -433,10 +432,11 @@ void __init tsi108_pci_int_init(struct device_node *node)
 {
 	DBG("Tsi108_pci_int_init: initializing PCI interrupts\n");
 
-	pci_irq_node = of_node_get(node);
-	pci_irq_host = irq_alloc_host(IRQ_HOST_MAP_LEGACY, 0, &pci_irq_host_ops, 0);
+	pci_irq_host = irq_alloc_host(of_node_get(node), IRQ_HOST_MAP_LEGACY,
+				      0, &pci_irq_host_ops, 0);
 	if (pci_irq_host == NULL) {
 		printk(KERN_ERR "pci_irq_host: failed to allocate irq host !\n");
+		of_node_put(node);
 		return;
 	}
 
diff --git a/arch/powerpc/sysdev/uic.c b/arch/powerpc/sysdev/uic.c
index 47180b3fca56..bf3766754173 100644
--- a/arch/powerpc/sysdev/uic.c
+++ b/arch/powerpc/sysdev/uic.c
@@ -56,9 +56,6 @@ struct uic {
 
 	/* For secondary UICs, the cascade interrupt's irqaction */
 	struct irqaction cascade;
-
-	/* The device node of the interrupt controller */
-	struct device_node *of_node;
 };
 
 static void uic_unmask_irq(unsigned int virq)
@@ -220,8 +217,7 @@ out_unlock:
 
 static int uic_host_match(struct irq_host *h, struct device_node *node)
 {
-	struct uic *uic = h->host_data;
-	return uic->of_node == node;
+	return h->of_node == node;
 }
 
 static int uic_host_map(struct irq_host *h, unsigned int virq,
@@ -291,7 +287,6 @@ static struct uic * __init uic_init_one(struct device_node *node)
 
 	memset(uic, 0, sizeof(*uic));
 	spin_lock_init(&uic->lock);
-	uic->of_node = of_node_get(node);
 	indexp = of_get_property(node, "cell-index", &len);
 	if (!indexp || (len != sizeof(u32))) {
 		printk(KERN_ERR "uic: Device node %s has missing or invalid "
@@ -308,8 +303,8 @@ static struct uic * __init uic_init_one(struct device_node *node)
 	}
 	uic->dcrbase = *dcrreg;
 
-	uic->irqhost = irq_alloc_host(IRQ_HOST_MAP_LINEAR, NR_UIC_INTS,
-				      &uic_host_ops, -1);
+	uic->irqhost = irq_alloc_host(of_node_get(node), IRQ_HOST_MAP_LINEAR,
+				      NR_UIC_INTS, &uic_host_ops, -1);
 	if (! uic->irqhost) {
 		of_node_put(node);
 		return NULL; /* FIXME: panic? */