On Thu, Sep 09, 2010 at 02:09:28AM -0700, Anil kumar wrote: > I quickly tried copying the data buffer to local buffers as follows: > > In Queuecommand: > > cmd->local_write_buf = pci_alloc_consistent(...); > cmd->write_buf = (u8 *)(kmap_atomic(sg->page, KM_IRQ0) + sg->offset); > > memcpy(cmd->local_write_buf, cmd->write_buf, scsibufflen(scsi_cmnd)); > > Now I calculate checksums of cmd->write_buf and my local cmd->local_write_buf > > and the checksum fails. Am I doing something wrong here? Are you only copying one element of the sg list? Are you sure that there is only one element? If not, you have to use something like scsi_kmap_atomic_sg and create a copy of each element (maybe use scsi_for_each_sg). Or maybe there is another problem... hard to guess from the distance. Christof -- 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
