irq_domain: Replace irq_alloc_host() with revmap-specific initializers

Each revmap type has different arguments for setting up the revmap.
This patch splits up the generator functions so that each revmap type
can do its own setup and the user doesn't need to keep track of how
each revmap type handles the arguments.

This patch also adds a host_data argument to the generators.  There are
cases where the host_data pointer will be needed before the function returns.
ie. the legacy map calls the .map callback for each irq before returning.

v2: - Add void *host_data argument to irq_domain_add_*() functions
    - fixed failure to compile
    - Moved IRQ_DOMAIN_MAP_* defines into irqdomain.c

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Milton Miller <miltonm@bga.com>
Tested-by: Olof Johansson <olof@lixom.net>

1 files changed, 2 insertions, 5 deletions

diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index c844d343bf32..c83a512fa175 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -1345,10 +1345,9 @@ struct mpic * __init mpic_alloc(struct device_node *node,
         mpic->isu_shift = 1 + __ilog2(mpic->isu_size - 1);
         mpic->isu_mask = (1 << mpic->isu_shift) - 1;
 
-        mpic->irqhost = irq_alloc_host(mpic->node, IRQ_DOMAIN_MAP_LINEAR,
+        mpic->irqhost = irq_domain_add_linear(mpic->node,
                                        isu_size ? isu_size : mpic->num_sources,
-                                       &mpic_host_ops,
-                                       flags & MPIC_LARGE_VECTORS ? 2048 : 256);
+                                       &mpic_host_ops, mpic);
 
         /*
          * FIXME: The code leaks the MPIC object and mappings here; this
@@ -1357,8 +1356,6 @@ struct mpic * __init mpic_alloc(struct device_node *node,
         if (mpic->irqhost == NULL)
                 return NULL;
 
-        mpic->irqhost->host_data = mpic;
-
         /* Display version */
         switch (greg_feature & MPIC_GREG_FEATURE_VERSION_MASK) {
         case 1: