RE: AW: PowerPC PCI DMA issues (prefetch/coherency?)

On Thu, 2009-09-10 at 22:35 -0700, Pravin Bathija wrote:

Thanks Stefan. The whole intention of the patch/hack (or whatever one
might call it :) ) was to avoid rogue drivers from setting
pci_cache_line_size to non-zero value even though the underlying
hardware doesn't support MRM calls. Nonetheless this approach works
only if the drivers use the kernel API for PCI config space access
provided by the powerpc platform driver.

Do you know many drivers that do config space accesses without using
the config space accessors ?

Such drivers should be banned to oblivion.

Cheers,
Ben.