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authorMichael Ellerman <mpe@ellerman.id.au>2016-09-06 14:53:24 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2016-09-20 13:57:12 +0300
commitef24ba7091517d2bbf9ba2cb4256c0dccd51d248 (patch)
treef988a2b82eab1ec83aa2a08e34190a9a32b4035f /arch/powerpc/sysdev/fsl_mpic_err.c
parent9d82fd2fae925efdf546cc25afdc664a2e3a2d9f (diff)
downloadlinux-ef24ba7091517d2bbf9ba2cb4256c0dccd51d248.tar.xz
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>
Diffstat (limited to 'arch/powerpc/sysdev/fsl_mpic_err.c')
-rw-r--r--arch/powerpc/sysdev/fsl_mpic_err.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/powerpc/sysdev/fsl_mpic_err.c b/arch/powerpc/sysdev/fsl_mpic_err.c
index b83f32562a37..488ec453038a 100644
--- a/arch/powerpc/sysdev/fsl_mpic_err.c
+++ b/arch/powerpc/sysdev/fsl_mpic_err.c
@@ -115,8 +115,8 @@ static irqreturn_t fsl_error_int_handler(int irq, void *data)
errint = __builtin_clz(eisr);
cascade_irq = irq_linear_revmap(mpic->irqhost,
mpic->err_int_vecs[errint]);
- WARN_ON(cascade_irq == NO_IRQ);
- if (cascade_irq != NO_IRQ) {
+ WARN_ON(!cascade_irq);
+ if (cascade_irq) {
generic_handle_irq(cascade_irq);
} else {
eimr |= 1 << (31 - errint);
@@ -134,7 +134,7 @@ void mpic_err_int_init(struct mpic *mpic, irq_hw_number_t irqnum)
int ret;
virq = irq_create_mapping(mpic->irqhost, irqnum);
- if (virq == NO_IRQ) {
+ if (!virq) {
pr_err("Error interrupt setup failed\n");
return;
}