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[ARM] ecard: add helper function for setting ecard irq ops

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Rather than having every driver fiddle about setting its private
IRQ operations and data, provide a helper function to contain
this functionality in one place.

Arrange to remove the driver-private IRQ operations and data when
the device is removed from the driver, and remove the driver
private code to do this.

This fixes potential problems caused by drivers forgetting to
remove these hooks.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2007-05-10 16:46:13 +01:00
committed by Russell King
parent 129a84de23
commit c7b87f3d50
8 changed files with 33 additions and 25 deletions
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16
arch/arm/kernel/ecard.c
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@@ -958,6 +958,14 @@ void ecard_release_resources(struct expansion_card *ec)
}
EXPORT_SYMBOL(ecard_release_resources);
void ecard_setirq(struct expansion_card *ec, const struct expansion_card_ops *ops, void *irq_data)
{
ec->irq_data = irq_data;
barrier();
ec->ops = ops;
}
EXPORT_SYMBOL(ecard_setirq);
/*
* Probe for an expansion card.
*
@@ -1133,6 +1141,14 @@ static int ecard_drv_remove(struct device *dev)
drv->remove(ec);
ecard_release(ec);
/*
* Restore the default operations. We ensure that the
* ops are set before we change the data.
*/
ec->ops = &ecard_default_ops;
barrier();
ec->irq_data = NULL;
return 0;
}