On Tuesday 13 May 2008 11:33:25 am Rene Herman wrote:
On 13-05-08 19:01, Alan Cox wrote:
On Tue, 13 May 2008 10:59:32 -0600, Bjorn Helgaas bjorn.helgaas@hp.com wrote:
On Friday 09 May 2008 12:06:55 am Takashi Iwai wrote:
Thanks for catching it. Yeah, the patch looks buggy. We had an implicit assumption that dev = NULL for ISA devices that require 24bit DMA.
Naive question #1: Why don't we have a struct device for these ISA devices? PNP builds a struct device with DMA_24BIT_MASK for ISAPNP devices.
Because nobody has done the needed work to get all the old ISA drivers converted. I guess isa_device would actually be a platform_device wrapper ?
No, isa_device is its own thing, on its own isa_bus (*). It has a struct device * readily available though...
(*) drivers/base/isa.c, and explanatory changelog at:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdif...
Thanks for the nice changelog.
isa_register_driver() currently doesn't set a DMA mask. Should it?
I only see about 35 dma_alloc_coherent() calls that pass NULL. I guess even those would be a fair amount of work to change, and I suppose there would be more that I missed.
Bjorn