parisc: Fix interrupt routing for C8000 serial ports

We can't use dev->mod_index for selecting the interrupt routing entry,
because it's not an index into interrupt routing table. It will be even
wrong on a machine with 2 CPUs (4 cores). But all needed information is
contained in the PAT entries for the serial ports. mod[0] contains the
iosapic address and mod_info has some indications for the interrupt
input (at least it looks like it). This patch implements the searching
for the right iosapic and uses this interrupt input information.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: <stable@vger.kernel.org> # 3.10
Signed-off-by: Helge Deller <deller@gmx.de>

2 files changed, 4 insertions, 0 deletions

diff --git a/arch/parisc/include/asm/parisc-device.h b/arch/parisc/include/asm/parisc-device.h
index 9afdad6c2ffb..eaf4dc1c7294 100644
--- a/arch/parisc/include/asm/parisc-device.h
+++ b/arch/parisc/include/asm/parisc-device.h
@@ -23,6 +23,7 @@ struct parisc_device {
         /* generic info returned from pdc_pat_cell_module() */
         unsigned long   mod_info;       /* PAT specific - Misc Module info */
         unsigned long   pmod_loc;       /* physical Module location */
+        unsigned long   mod0;
 #endif
         u64             dma_mask;       /* DMA mask for I/O */
         struct device   dev;
@@ -61,4 +62,6 @@ parisc_get_drvdata(struct parisc_device *d)
 
 extern struct bus_type parisc_bus_type;
 
+int iosapic_serial_irq(struct parisc_device *dev);
+
 #endif /*_ASM_PARISC_PARISC_DEVICE_H_*/
diff --git a/arch/parisc/kernel/inventory.c b/arch/parisc/kernel/inventory.c
index 3295ef4a185d..f0b6722fc706 100644
--- a/arch/parisc/kernel/inventory.c
+++ b/arch/parisc/kernel/inventory.c
@@ -211,6 +211,7 @@ pat_query_module(ulong pcell_loc, ulong mod_index)
         /* REVISIT: who is the consumer of this? not sure yet... */
         dev->mod_info = pa_pdc_cell->mod_info;  /* pass to PAT_GET_ENTITY() */
         dev->pmod_loc = pa_pdc_cell->mod_location;
+        dev->mod0 = pa_pdc_cell->mod[0];
 
         register_parisc_device(dev);    /* advertise device */