On Sat, 23 Feb 2008, Michael Schmitz wrote:
> Hi, > > > > The only missing bit is to skip the writeback, as the fault has to > > > be first fixed by the caller, so the patch below should do the > > > trick... > > > > It does indeed do the trick! Thanks, Roman. > > No more access faults from kernel space possible this way? The faults are all generated by accesses to the PDMA glue logic I/O register; that address would be in kernel space. > What happens with PDMA commands that fail during error processing - > won't that command data belong in kernel space? esp->command_block is in kernel space too but I don't know what the implications are for handling faults. I have had to use the chip's transfer count to determine where to resume a sequence of writes to the I/O register following a fault. Apparently a bus error on a read from the I/O register prevents the post-increment on the destination address, so resuming is simpler. > > Otherwise, great job, Finn! Thanks! -f > > Cheers, > > Michael > > > - To unsubscribe from this list: send the line "unsubscribe linux-m68k" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
