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[PATCH] powerpc: parallel port init fix 

This stops parport from accessing nonexistent parallel ports.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Michael Neuling 2006-01-11 12:08:56 +11:00 committed by Paul Mackerras
parent 296167ae17
commit 193cac99f6
1 changed files with 26 additions and 2 deletions
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28
include/asm-powerpc/parport.h
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@ -10,10 +10,34 @@
#define _ASM_POWERPC_PARPORT_H
#ifdef __KERNEL__
static int __devinit parport_pc_find_isa_ports (int autoirq, int autodma);
#include <asm/prom.h>
extern struct parport *parport_pc_probe_port (unsigned long int base,
unsigned long int base_hi,
int irq, int dma,
struct pci_dev *dev);
static int __devinit parport_pc_find_nonpci_ports (int autoirq, int autodma)
{
return parport_pc_find_isa_ports (autoirq, autodma);
struct device_node *np;
u32 *prop;
u32 io1, io2;
int propsize;
int count = 0;
for (np = NULL; (np = of_find_compatible_node(np,
"parallel",
"pnpPNP,400")) != NULL;) {
prop = (u32 *)get_property(np, "reg", &propsize);
if (!prop || propsize > 6*sizeof(u32))
continue;
io1 = prop[1]; io2 = prop[2];
prop = (u32 *)get_property(np, "interrupts", NULL);
if (!prop)
continue;
if (parport_pc_probe_port(io1, io2, prop[0], autodma, NULL) != NULL)
count++;
}
return count;
}
#endif /* __KERNEL__ */