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6bab2c613d
commit bedd30d986 ("genirq: make irqreturn_t an enum") blindly replaced
"0" by "IRQ_NONE" in the "IRQ_RETVAL(x)" macro definition.
However, as "x" is a condition, "0" meant "boolean false", not an
irqreturn_t value.
All of this worked, and kept working after the addition of IRQ_WAKE_THREAD,
as
- both "boolean false" and "IRQ_NONE" are "0" (for the comparison),
- "boolean true" and "boolean false" nicely map to the correct values of
"IRQ_HANDLED" and "IRQ_NONE" (for the return value).
Correct the macro definition for clarity and future-proofness.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
20 lines
445 B
C
20 lines
445 B
C
#ifndef _LINUX_IRQRETURN_H
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#define _LINUX_IRQRETURN_H
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/**
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* enum irqreturn
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* @IRQ_NONE interrupt was not from this device
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* @IRQ_HANDLED interrupt was handled by this device
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* @IRQ_WAKE_THREAD handler requests to wake the handler thread
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*/
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enum irqreturn {
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IRQ_NONE = (0 << 0),
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IRQ_HANDLED = (1 << 0),
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IRQ_WAKE_THREAD = (1 << 1),
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};
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typedef enum irqreturn irqreturn_t;
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#define IRQ_RETVAL(x) ((x) ? IRQ_HANDLED : IRQ_NONE)
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#endif
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