lkml.org 
[lkml]   [2008]   [May]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.6.26-rc1 regression: ISA DMA broken (bisected)
On 14-05-08 20:50, Bjorn Helgaas wrote:

> On Wednesday 14 May 2008 12:41:56 pm Rene Herman wrote:

>> You're in a maze of struct device *s, all alike... I was passing the
>> pnp_card->dev instead of the initialized pnp_dev->dev.
>>
>> And, not doing so brings out a difference between ISAPnP and legacy ISA
>> again insofar that legacy ISA does not consist of cards with multiple
>> devices. We just have the single struct device * for the ISA device.
>>
>> This therefore would be the easiest solution (and works fine) but seems
>> a bit of a hack. Bjorn, do you have an opinion? If I abstract things out
>> a bit more I might be able to do this nicer. One might on the other hand
>> argue that the dma_mask is going to be constant for all card devices so
>> might as well just use the card dev.
>
> I agree, it seems a bit of a hack to use a DMA mask from the card
> instead of from the device, since the driver should be programming
> the device to do the DMA.
>
> But I know very little about pnp_card in general, so don't attach too
> much weight to my opinion.

Okay, I'll sit on this for a bit. Right now we're using a global device even
but this is exactly about cleaning that up so couldn't convince myself. Will
see what happens when I try to make it nice...

Rene.


\
 
 \ /
  Last update: 2008-05-14 21:09    [W:0.066 / U:0.336 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site