powerpc: Remove all usages of NO_IRQ
NO_IRQ has been == 0 on powerpc for just over ten years (since commit
0ebfff1491ef ("[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>
diff --git a/drivers/ps3/ps3-vuart.c b/drivers/ps3/ps3-vuart.c
index 632701a..b7f300b 100644
--- a/drivers/ps3/ps3-vuart.c
+++ b/drivers/ps3/ps3-vuart.c
@@ -958,7 +958,7 @@
fail_request_irq:
ps3_vuart_irq_destroy(vuart_bus_priv.virq);
- vuart_bus_priv.virq = NO_IRQ;
+ vuart_bus_priv.virq = 0;
fail_alloc_irq:
kfree(vuart_bus_priv.bmp);
vuart_bus_priv.bmp = NULL;
@@ -982,7 +982,7 @@
free_irq(vuart_bus_priv.virq, &vuart_bus_priv);
ps3_vuart_irq_destroy(vuart_bus_priv.virq);
- vuart_bus_priv.virq = NO_IRQ;
+ vuart_bus_priv.virq = 0;
kfree(vuart_bus_priv.bmp);
vuart_bus_priv.bmp = NULL;