Messages in this thread Patch in this message | | | Date | Thu, 24 Jul 2014 15:39:21 +0200 | From | Peter Zijlstra <> | Subject | [PATCH] irq: Warn when shared interrupts do not match on NO_SUSPEND |
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Subject: 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.
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Peter Zijlstra <peterz@infradead.org> --- kernel/irq/manage.c | 7 +++++-- 1 file 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 */[unhandled content-type:application/pgp-signature] | |