> MSI doesn't work on RS400-200 and RS480 requiring pci=nomsi kernel
> boot parameter for ahci to work. This patch renames quirk_svw_msi()
> to quirk_disable_all_msi() and use it to disable MSI on those chips.
>
>
http://thread.gmane.org/gmane.linux.ide/17820
>
http://thread.gmane.org/gmane.linux.ide/17516
>
https://bugzilla.novell.com/show_bug.cgi?id=263893
>
> Signed-off-by: Tejun Heo <htejun@gmail.com>
> Cc: Matías Alejandro Torres <torresmat@gmail.com>
> ---
> Okay, this is the fixed version and should probably included in
> -stable too as there have been quite some number of reports which got
> resolved by adding 'pci=nomsi'. Verified by Matías Alejandro Torres.
>
> Thanks.
>
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 3411483..1e3070e 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -1624,18 +1624,20 @@ DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_N
> quirk_nvidia_ck804_pcie_aer_ext_cap);
>
> #ifdef CONFIG_PCI_MSI
> -/* The Serverworks PCI-X chipset does not support MSI. We cannot
> easily rely
> - * on setting PCI_BUS_FLAGS_NO_MSI in its bus flags because there
> are actually
> - * some other busses controlled by the chipset even if Linux is not
> aware of it.
> - * Instead of setting the flag on all busses in the machine, simply
> disable MSI
> - * globally.
> +/* Some chipsets do not support MSI. We cannot easily rely on setting
> + * PCI_BUS_FLAGS_NO_MSI in its bus flags because there are actually
> + * some other busses controlled by the chipset even if Linux is not
> + * aware of it. Instead of setting the flag on all busses in the
> + * machine, simply disable MSI globally.
> */
> -static void __init quirk_svw_msi(struct pci_dev *dev)
> +static void __init quirk_disable_all_msi(struct pci_dev *dev)
> {
> pci_no_msi();
> printk(KERN_WARNING "PCI: MSI quirk detected. MSI
> deactivated.\n"); }
> -DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS,
> PCI_DEVICE_ID_SERVERWORKS_GCNB_LE, quirk_svw_msi);
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SERVERWORKS,
> PCI_DEVICE_ID_SERVERWORKS_GCNB_LE, quirk_disable_all_msi);
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI,
> PCI_DEVICE_ID_ATI_RS400_200, quirk_disable_all_msi);
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RS480,
> quirk_disable_all_msi); /* Disable MSI on chipsets that are known to
> not support it */ static void __devinit quirk_disable_msi(struct
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