* Could enabling MSI interrupts lead to problems?
@ 2013-12-02 13:43 Sebastian Andrzej Siewior
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From: Sebastian Andrzej Siewior @ 2013-12-02 13:43 UTC (permalink / raw)
To: linux-pci
I've been playing with PCIe parallel port cards. Both of them have the
MSI flag set and it is possible to enable MSI interrupts. The advantage
is that the interrupt is no longer shared with other devices and it
becomes edge instead of level.
Now I'm thinking about posting a patch which always calls
pci_enable_msi() on init so we have MSI support in parport_pc driver if
possible. I know that atleast XHCI has a flag not to enable MSI on some
FRESCO_LOGIC devices because they announce it but can't generate
interrupts with MSI enabled. Is this something "usual" and I should only
enable MSI based on a whitelist or is this more something exceptional?
Sebastian
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2013-12-02 13:43 Could enabling MSI interrupts lead to problems? Sebastian Andrzej Siewior
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