From: James Bottomley <James.Bottomley@xxxxxxxxxxxx> Subject: Proposals to change the way all drivers work with SCSI commands Date: Fri, 11 May 2007 13:33:41 -0500 > Right at the moment, we're planning to clean up the way SCSI drivers > process commands. The proposals are essentially: > > 1. Get rid of the now unnecessary map_single path (every command is > either zero transfer or scatter/gather) > 2. use accessors to manipulate the SG lists (mainly so that we can > alter the implementation without affecting the drivers) > > It strikes me that in all of this, we could also consider doing the DMA > mapping inside the mid layer (instead of in every driver). This is > essentially what libata is already doing ... leading to confusion in > SCSI drivers that use libata for SATA. Several drivers don't take account of the mapping failure and handling the failure for some is tricky. So it would be nice if the mid layer takes care about the mapping. - 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
