Stefan Richter wrote: > Al Boldi wrote: >> Stefan Richter wrote: >>> Still wrong. SCSI also needs HAS_DMA and SCSI_DMA. >> I don't think so. SCSI selects SCSI_DMA, it doesn't depend on it. > > "A selects B" == "A depends on B, but please don't hide A when B is off > and silently switch B on when A is switched on". > > config SCSI > tristate "SCSI device support" > depends on BLOCK > select SCSI_DMA if HAS_DMA > > So, SCSI doesn't actually need SCSI_DMA per se, but it apparently needs > it whenever HAS_DMA != n.
In fact, only a number of SCSI low-level drivers need SCSI_DMA. But libata and usb-storage are currently not among those drivers. For them it's currently harmless if SCSI_DMA is off. SCSI_DMA only includes the symbols scsi_dma_map() and scsi_dma_unmap() into the scsi core. libata and usb-storage don't call these. -- Stefan Richter -=====-==--- ---= --==- http://arcgraph.de/sr/ - To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
