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powerpc: Remove all usages of NO_IRQ

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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>
This commit is contained in:
Michael Ellerman
2016-09-06 21:53:24 +10:00
parent 9d82fd2fae
commit ef24ba7091
80 changed files with 204 additions and 200 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
arch/powerpc/kernel/pci-common.c
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@@ -360,7 +360,7 @@ static int pci_read_irq_line(struct pci_dev *pci_dev)
line, pin);
virq = irq_create_mapping(NULL, line);
if (virq != NO_IRQ)
if (virq)
irq_set_irq_type(virq, IRQ_TYPE_LEVEL_LOW);
} else {
pr_debug(" Got one, spec %d cells (0x%08x 0x%08x...) on %s\n",
@@ -369,7 +369,8 @@ static int pci_read_irq_line(struct pci_dev *pci_dev)
virq = irq_create_of_mapping(&oirq);
}
if(virq == NO_IRQ) {
if (!virq) {
pr_debug(" Failed to map !\n");
return -1;
}