On Fri, Dec 21, 2007 at 06:16:41AM -0700, Matthew Wilcox wrote: > On Fri, Dec 21, 2007 at 10:33:26AM +0000, Alan Cox wrote: > > On Fri, 21 Dec 2007 13:30:08 +1100 > > Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> wrote: > > > > > The sense buffer ins scsi_cmnd can nowadays be DMA'ed into directly > > > by some low level drivers (that typically happens with USB mass > > > storage). > > > > Should that not be fixed in USB storage by using pci_alloc_coherent on the > > PCI device of the hub not peeing directly into kernel space ? > > That's what I said, but Ben seems fixated on this particular fix. there are SCSI host drivers, which also DMA to the sense buffer like sgiwd93.c for example. Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessary a good idea. [ RFC1925, 2.3 ] - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
