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Andrew Morton wrote: > Andi says "It's more likely a hardware bug that needs to be handled by the > driver maintainer. sata_mv has an pci_enable_msi(). Hardware that reports > MSI capability but breaks when it's actually used is not unheard of." > It seems strange that pci_enable_msi() succeeded if the device is not > MSI-capable? Unfortunately this is not strange :( People have been coding interrupt tests into MSI drivers -- shades of the early 90's -- because pci_enable_msi() does not fail for systems that do not support MSI. -Sometimes- it will fail as expected, if system does not support MSI, sometimes not. For this case -- 32bit non-Intel mobo chipset -- the cause of the failure is likely the poor pci_enable_msi() test. However, I know of at least one MSI-related sata_mv hardware bug that needs working around, but that only affects 64-bit. Given that MSI works with this chip on other systems, I'm leaning towards blaming the system. The following are reasonable workarounds: * Add pci=nomsi kernel parameter... we really need this * Add 'msi' module option to sata_mv I'll try to get around to committing the errata to source code. Marvell's triple-layered vendor driver is GPL'd, so anyone can steal this task from me... Jeff - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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