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genirq: Call bus_lock/unlock functions in setup_irq()

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irq_chips that supply .irq_bus_lock/.irq_bus_sync_unlock functions,
expect that the other chip methods will be called inside of calls to
the pair.  If this expectation is not met, things tend to not work.

Make setup_irq() call chip_bus_lock()/chip_bus_sync_unlock() too.

For the vast majority of irq_chips, this will be a NOP as most don't
have these bus lock functions.

[ tglx: No we don't want to call that in __setup_irq(). Way too many
  	error exit pathes. ]

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
LKML-Reference: <1297296265-18680-1-git-send-email-ddaney@caviumnetworks.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
David Daney 2011-02-09 16:04:25 -08:00 committed by Thomas Gleixner
parent 100b33c8bd
commit 986c011ddb
1 changed files with 6 additions and 1 deletions
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7
kernel/irq/manage.c
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@ -871,9 +871,14 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
*/
int setup_irq(unsigned int irq, struct irqaction *act)
{
int retval;
struct irq_desc *desc = irq_to_desc(irq);
return __setup_irq(irq, desc, act);
chip_bus_lock(desc);
retval = __setup_irq(irq, desc, act);
chip_bus_sync_unlock(desc);
return retval;
}
EXPORT_SYMBOL_GPL(setup_irq);