Messages in this thread | | | Subject | Re: Possible issue with dangling PCI BARs | From | Benjamin Herrenschmidt <> | Date | Thu, 13 Dec 2007 14:04:58 +1100 |
| |
On Thu, 2007-12-13 at 14:00 +1100, Benjamin Herrenschmidt wrote:
.../...
(oops, sent too fast)
> So not only we can have a dangling BAR, but nothing prevent us to > actually go turn IO or MEM decoding on in case it wasn't already the > case on that device.
And I was about to say before I clicked "send".. can't we do something like writing all ff's into the BAR at the same time as we clear res->start ? Isn't that supposed to pretty much disable decoding on that BAR ? Or not... Probably still better than leaving it to whatever dangling value it had no ?
Also, maybe we should disable IO and MEM decoding by default on devices for which one resource of that type failed to allocate ?
Ben.
| |