On Thu, 13 Apr 2006 12:40:36 -0500 James Bottomley wrote: > On Thu, 2006-04-13 at 09:36 -0700, Randy.Dunlap wrote: > > Is aha152x(_cs) known not to work with highmem or is it just busted > > in its use of s/g list handling? > > This is 2.6.17-rc1-git7 on a Dell notebook with 2 GB RAM. > > > > On all recent kernels, I get an Oops in aha152x.c:datao_run(), > > where the SG_ADDRESS() macro uses page_address(). > > This routine is trying to do the identical action that Guennady > Liakhovetski just posted a dc395x patch for (i.e. re-feed a DMA > transaction via PIO) could we see if we can utilise pieces of that patch > to do this correctly (or provide more common infrastructure)? I've spent a lot of time using the sg-PIO patch with the aha152x driver. The sg-PIO part of it works for me, but the aha152x driver sometimes does not complete a full DMA-out transfer (data-out phase). The driver calls this the need to "resend" some data (in datao_end()). I can't get this resend logic to work correctly with the sg-PIO changes and I can't keep spending time on it without some docs and/or errata, so I'll just continue to use my lowmem patch for the aha152x driver. --- ~Randy - : 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
