Re: [another PATCH] Fix crash on boot in kmalloc_node IDE changes

[Andi Kleen]

On Thu, Jul 07, 2005 at 09:32:51AM -0700, Christoph Lameter wrote:
> On Thu, 7 Jul 2005, Andi Kleen wrote:
> 
> > On Thu, Jul 07, 2005 at 09:21:55AM -0700, Christoph Lameter wrote:
> > > On Wed, 6 Jul 2005, Andi Kleen wrote:
> > > 
> > > > Without this patch a dual Xeon EM64T machine would oops on boot
> > > > because the hwif pointer here was NULL. I also added a check for
> > > > pci_dev because it's doubtful that all IDE devices have pci_devs.
> > > 
> > > Here is IMHO the right way to fix this. Test for the hwif != NULL and
> > > test for pci_dev != NULL before determining the node number of the pci 
> > > bus that the device is connected to. Maybe we need a hwif_to_node for ide 
> > > drivers that is also able to determine the locality of other hardware?
> > 
> > Hmm? Where is the difference? 
> 
> node = -1 if the node cannot be determined.

But that will crash right now.

Trading one crash for another doesn't seem to be particularly useful.


> > This is 100% equivalent to my code except that you compressed
> > it all into a single expression.
> 
> My patch consistently checks for hwif != NULL and pci_dev != NULL. 
> There was someother stuff in your patch. This patch does not add any 
> additional variables and is more readable.

No it was exactly the same except for a working node number.

-Andi

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