On 4/8/21 3:45 AM, Douglas Gilbert wrote:
When the NO_DXFER flag is use on a command/request, the data-in and data-out buffers (if present) should not be ignored. Add sg_rq_map_kern() function to handle this. Uses a single bio with multiple bvec_s usually each holding multiple pages, if necessary. The driver default element size is 32 KiB so if PAGE_SIZE is 4096 then get_order()==3 . Signed-off-by: Douglas Gilbert <dgilbert@xxxxxxxxxxxx> --- drivers/scsi/sg.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+)
Reviewed-by: Hannes Reinecke <hare@xxxxxxx> Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@xxxxxxx +49 911 74053 688 SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer
