On Fri, 30 Jan 2015, Andi Kleen wrote: > > We don't "need" any backward compatility, why not fix the broken drivers > > that are using memory outside of what they are asking for? That's not > > ok no matter what, right? > > How would you find them all? > > We don't even know which place in XHCI is the culprit here. It shouldn't be too hard to find, expecially if the fault can easily be reproduced. There are only about half a dozen calls to dma_alloc_coherent in the xhci-hcd driver. Just add 64 KB to the requested memory size in each of them. Then one-by-one (or using bisection) remove the extra size and see which spots trigger the fault. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
