lkml.org 
[lkml]   [2001]   [Mar]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: SLAB vs. pci_alloc_xxx in usb-uhci patch
On Mon, Mar 05, 2001 at 02:52:24PM -0800, David Brownell wrote:
> I didn't see that thread. I agree, pci_alloc_consistent() already has
> a signature that's up to the job. The change you suggest would need
> to affect every architecture's implementation of that code ... which
> somehow seems not the best solution at this time.

Needless to say that USB is currently broken for the architectures that
need pci_alloc_consistent.

A while ago, I looked at what was required to convert the OHCI driver
to pci_alloc_consistent, and it turns out that the current interface is
highly sub-optimal. It looks good on the face of it, but it _really_
does need sub-page allocations to make sense for USB.

At the time, I didn't feel like creating a custom sub-allocator just
for USB, and since then I haven't had the inclination nor motivation
to go back to trying to get my USB mouse or iPAQ communicating via USB.
(I've not used this USB port for 3 years anyway).

I'd be good to get it done "properly" at some point though.

--
Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux
http://www.arm.linux.org.uk/personal/aboutme.html
-
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/

\
 
 \ /
  Last update: 2005-03-22 13:29    [W:0.102 / U:6.368 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site