Dan Mick wrote:
Juergen Keil wrote:
How is a driver supposed to behave in such a case, when it has sucessfully
suspended the device but the interrupt handler is still invoked because it
is sharing the interrupt with some other device that is not yet suspended?
Shouldn't ohci set some flag in its softstate when ohci_detach(DDI_SUSPEND)
has run, and just return with DDI_INTR_UNCLAIMED from ohci_intr() when
ohci_intr is invoked for such a suspended device?
Certainly return without doing damage, yes, and DDI_INTR_UNCLAIMED seems
like the best possible way...
I'm surprised suspendable drivers don't do this as a matter of course.
If there is no one actually handling the interrupt, i.e. clearing the
interrupt on the hardware that is asserting it, wouldn't it cause an
endless invocation of the interrupt?
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