Paul Mundt wrote: > This implements the same D-cache flushing logic for r8a66597-hcd as > Catalin's isp1760 (http://patchwork.kernel.org/patch/76391/) change, > with the same note applying here as well: > > When the HDC driver writes the data to the transfer buffers it > pollutes the D-cache (unlike DMA drivers where the device writes > the data). If the corresponding pages get mapped into user space, > there are no additional cache flushing operations performed and > this causes random user space faults on architectures with > separate I and D caches (Harvard) or those with aliasing D-cache. > > This fixes up crashes during USB boot on SH7724 and others: > > http://marc.info/?l=linux-sh&m=126439837308912&w=2 > > Reported-by: Goda Yusuke <goda.yusuke@xxxxxxxxxxx> > Tested-by: Goda Yusuke <goda.yusuke@xxxxxxxxxxx> > Signed-off-by: Paul Mundt <lethal@xxxxxxxxxxxx> > > --- > > Shimoda-san, once you Ack these I plan to send them off to Linus for 2.6.33. Thank you very much for your help. Acked-by: Yoshihiro Shimoda <shimoda.yoshihiro@xxxxxxxxxxx> Thanks, Yoshihiro Shimoda -- 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
