Re: 2.6.23-rc8-mm2: OOPS in mmc on boot

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, Oct 04 2007, Pierre Ossman wrote:
> On Thu, 4 Oct 2007 11:30:14 +0200
> Jens Axboe <[email protected]> wrote:
> 
> > On Thu, Oct 04 2007, Pierre Ossman wrote:
> > > 
> > > I assume sg_init_one() still can work on an uninitialized sg entry?
> > 
> > Yes, but only if that sg entry is not part of a chained list.
> > 
> 
> Is that a yes or a no? You said that the ->page field was involved in

It's a conditional yes, re-read it :-)

> list chaining, so does or doesn't it have to be initialized before a
> call to sg_init_one()?

That's not the problem. It has to be initialized before calling
blk_rq_map_sg(). sg_init_one() will zero the entire sg entry, and that
breaks if that particular sg entry is part of a larger sg table AND that
sg entry happens to be the chain element.

-- 
Jens Axboe

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux