aboutsummaryrefslogtreecommitdiff
path: root/include/asm-ppc64/dbdma.h
diff options
context:
space:
mode:
authorRoman Kagan <rkagan@mail.ru>2005-05-06 00:55:56 +0400
committerGreg KH <gregkh@suse.de>2005-06-03 00:04:30 -0700
commit719df469cb51199316ae2a11c75a8046be34b899 (patch)
tree8f96e3713ad52b9308f22a464da14a1d7a685675 /include/asm-ppc64/dbdma.h
parent1724757e5ab5219b46876ac6e4e362a4b2dcfa86 (diff)
[PATCH] USB: update urb documentation
On Wed, May 04, 2005 at 01:37:30PM -0700, David Brownell wrote: > On Wednesday 04 May 2005 12:19 pm, Roman Kagan wrote: > > struct urb { > > /* private, usb core and host controller only fields in the urb */ > > ... > > struct list_head urb_list; /* list pointer to all active urbs */ > > ... > > }; > > > > Is it safe to use it for driver's purposes when the driver owns the urb, > > that is, starting from the completion routine until the urb is submitted > > with usb_submit_urb()? > > Right now, it should be. Great! FWIW I've briefly tested a modified version of usbatm using the list head in struct urb instead of creating a wrapper struct, and I haven't seen any failures yet. So I tend to believe that your "should be" actually means "is" :) > > If it is, can it be guaranteed in future, e.g. > > by moving the list head into the public section of struct urb? > > In fact I'm not sure why it ever got called "private" to usbcore/hcds. > I thought the idea was that it should be like urb->status, reserved for > whoever controls the URB. OK then how about the following (essentially documentation) patch? Signed-off-by: Roman Kagan <rkagan@mail.ru> Acked-by: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/asm-ppc64/dbdma.h')
0 files changed, 0 insertions, 0 deletions