On Tue, Jun 20, 2006 at 04:28:21PM -0600, Eric W. Biederman wrote:
> Currently we attempt to predict how many irqs we will be
> able to allocate with msi using pci_vector_resources and some
> complicated accounting, and then we only allow each device
> as many irqs as we think are available on average.
>
> Only the s2io driver even takes advantage of this feature
> all other drivers have a fixed number of irqs they need and
> bail if they can't get them.
>
> pci_vector_resources is inaccurate if anyone ever frees an irq.
> The whole implmentation is racy. The current irq limit policy
> does not appear to make sense with current drivers. So I have
> simplified things. We can revisit this we we need a more sophisticated
> policy.
>
> Signed-off-by: Eric W. Biederman <[email protected]>
> ---
> arch/i386/pci/irq.c | 30 -----------------------------
> arch/ia64/pci/pci.c | 9 ---------
> drivers/pci/msi.c | 53 ++++++++-------------------------------------------
> drivers/pci/msi.h | 11 -----------
> 4 files changed, 8 insertions(+), 95 deletions(-)
>
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index 40499c0..772f5b6 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
>
> @@ -542,11 +540,6 @@ void pci_scan_msi_device(struct pci_dev
> {
> if (!dev)
> return;
> -
> - if (pci_find_capability(dev, PCI_CAP_ID_MSIX) > 0)
> - nr_msix_devices++;
> - else if (pci_find_capability(dev, PCI_CAP_ID_MSI) > 0)
> - nr_reserved_vectors++;
> }
Actually, why not just eliminate this function and the
corresponding call from probe.c? It does nothing useful with all
the vector tracking gone from generic MSI code.
Rajesh
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