On Sat, 3 Nov 2012 05:26:35 +0100 Borislav Petkov <bp@xxxxxxxxx> wrote: > On Wed, Oct 24, 2012 at 11:57:46AM +0100, Alan Cox wrote: > > Which is an ATA layer bug - adev->dma_mode should never be called > > without a DMA mode in normal use. > > Ok, it looks like this would take a while to fix. > > Alan, what is your suggestion for a proper fix, uncomment XFER_PIO_SLOW > and drop to it with a big warning that ACPI is giving botched No. The proper fix is to find out how it got called with no DMA mode set. There is no reason ACPI can't return pure PIO answers. If it does however then the DMA mode setting call should not be made by the core libata code. Lots of our ATA driver code relies upon that so if it's actually what is happening that is what needs fixing. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
