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| author | Peter Zijlstra <peterz@infradead.org> | 2014-07-24 15:39:21 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2014-07-24 17:32:56 +0200 |
| commit | 4fae4e7624653ef498d0e2a38f00620b9701ab04 (patch) | |
| tree | b54ebbc2342f696970bf2c760087a48cc8be09b6 /kernel/irq | |
| parent | 1b0733837a9b2b8e006c787c628d0085073a5c36 (diff) | |
| download | linux-stable-4fae4e7624653ef498d0e2a38f00620b9701ab04.tar.gz linux-stable-4fae4e7624653ef498d0e2a38f00620b9701ab04.tar.bz2 linux-stable-4fae4e7624653ef498d0e2a38f00620b9701ab04.zip | |
irq: Warn when shared interrupts do not match on NO_SUSPEND
When suspend_device_irqs() iterates all descriptors, its pointless if
one has NO_SUSPEND set while another has not.
Validate on request_irq() that NO_SUSPEND state maches for SHARED
interrupts.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Link: http://lkml.kernel.org/r/20140724133921.GY6758@twins.programming.kicks-ass.net
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/manage.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 88657d7bc9dd..27a1fe028afb 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -1077,9 +1077,12 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) * set the trigger type must match. Also all must * agree on ONESHOT. */ + +#define IRQF_MISMATCH \ + (IRQF_TRIGGER_MASK | IRQF_ONESHOT | IRQF_NO_SUSPEND) + if (!((old->flags & new->flags) & IRQF_SHARED) || - ((old->flags ^ new->flags) & IRQF_TRIGGER_MASK) || - ((old->flags ^ new->flags) & IRQF_ONESHOT)) + ((old->flags ^ new->flags) & IRQF_MISMATCH)) goto mismatch; /* All handlers must agree on per-cpuness */ |