On Mon, Aug 19, 2013 at 01:37:27PM -0700, Daniel Gimpelevich wrote: > There is no need to get an interface specification if we know it's the > wrong one; trivial change. The big thing, though, was explained in the > #mipslinux IRC channel: > [Mon 2013-08-19 12:28:21 PM PDT] <headless> guys, are you sure it's not "DMA off stack" case? > [Mon 2013-08-19 12:28:35 PM PDT] <headless> it's a known stack corruptor on non-coherent arches > [Mon 2013-08-19 12:31:48 PM PDT] <DonkeyHotei> headless: for usb/ehci? > [Mon 2013-08-19 12:34:11 PM PDT] <DonkeyHotei> headless: explain > [Mon 2013-08-19 12:35:38 PM PDT] <headless> usb_control_msg() (or other such func) should not use buffer on stack. DMA from/to stack is prohibited > [Mon 2013-08-19 12:35:58 PM PDT] <headless> and EHCI uses DMA on control xfers (as well as all the others) > > Signed-off-by: Daniel Gimpelevich <daniel@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> -- 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
