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ef24ba7091
NO_IRQ has been == 0 on powerpc for just over ten years (since commit
0ebfff1491 ("[POWERPC] Add new interrupt mapping core and change
platforms to use it")). It's also 0 on most other arches.
Although it's fairly harmless, every now and then it causes confusion
when a driver is built on powerpc and another arch which doesn't define
NO_IRQ. There's at least 6 definitions of NO_IRQ in drivers/, at least
some of which are to work around that problem.
So we'd like to remove it. This is fairly trivial in the arch code, we
just convert:
if (irq == NO_IRQ) to if (!irq)
if (irq != NO_IRQ) to if (irq)
irq = NO_IRQ; to irq = 0;
return NO_IRQ; to return 0;
And a few other odd cases as well.
At least for now we keep the #define NO_IRQ, because there is driver
code that uses NO_IRQ and the fixes to remove those will go via other
trees.
Note we also change some occurrences in PPC sound drivers, drivers/ps3,
and drivers/macintosh.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
43 lines
917 B
C
43 lines
917 B
C
/*
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* parport.h: platform-specific PC-style parport initialisation
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*
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* Copyright (C) 1999, 2000 Tim Waugh <tim@cyberelk.demon.co.uk>
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*
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* This file should only be included by drivers/parport/parport_pc.c.
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*/
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#ifndef _ASM_POWERPC_PARPORT_H
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#define _ASM_POWERPC_PARPORT_H
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#ifdef __KERNEL__
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#include <asm/prom.h>
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static int parport_pc_find_nonpci_ports (int autoirq, int autodma)
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{
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struct device_node *np;
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const u32 *prop;
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u32 io1, io2;
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int propsize;
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int count = 0;
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int virq;
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for_each_compatible_node(np, "parallel", "pnpPNP,400") {
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prop = of_get_property(np, "reg", &propsize);
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if (!prop || propsize > 6*sizeof(u32))
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continue;
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io1 = prop[1]; io2 = prop[2];
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virq = irq_of_parse_and_map(np, 0);
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if (!virq)
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continue;
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if (parport_pc_probe_port(io1, io2, virq, autodma, NULL, 0)
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!= NULL)
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count++;
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}
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return count;
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}
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#endif /* __KERNEL__ */
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#endif /* !(_ASM_POWERPC_PARPORT_H) */
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