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Michael Ellerman ef24ba7091 powerpc: Remove all usages of NO_IRQ 
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>
 		2016-09-20 20:57:12 +10:00
..
44x.h powerpc/44x: PHY fixup for USB on canyonlands board 2011-02-02 06:58:26 -05:00
Kconfig powerpc: do away with ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB 2016-06-08 09:54:53 +02:00
Makefile IBM Akebono: Add the Akebono platform 2014-05-01 08:26:26 +10:00
canyonlands.c powerpc: Move 32-bit probe() machine to later in the boot process 2016-07-21 19:06:42 +10:00
ebony.c powerpc: Move 32-bit probe() machine to later in the boot process 2016-07-21 19:06:42 +10:00
idle.c [POWERPC] 4xx: Add idle wait support for 44x platforms 2008-04-16 07:32:06 -05:00
iss4xx.c powerpc: Move 32-bit probe() machine to later in the boot process 2016-07-21 19:06:42 +10:00
misc_44x.S [POWERPC] 4xx: Create common ppc4xx_reset_system() in ppc4xx_soc.c 2008-04-02 20:44:56 -05:00
ppc44x_simple.c powerpc: Move 32-bit probe() machine to later in the boot process 2016-07-21 19:06:42 +10:00
ppc476.c powerpc: Move 32-bit probe() machine to later in the boot process 2016-07-21 19:06:42 +10:00
ppc476_modules.lds ppc476: Enable a linker work around for IBM errata #46 2014-05-01 08:26:34 +10:00
sam440ep.c powerpc: Move 32-bit probe() machine to later in the boot process 2016-07-21 19:06:42 +10:00
virtex.c powerpc: Move 32-bit probe() machine to later in the boot process 2016-07-21 19:06:42 +10:00
virtex_ml510.c POWERPC: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
warp.c powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00