lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

libata: implement PMP helpers

Browse Source 
Implement helpers to test whether PMP is supported, attached and
determine pmp number to use when issuing SRST to a link.  While at it,
move ata_is_host_link() so that it's together with the two new PMP
helpers.

This change simplifies LLDs and helps making PMP support optional.

Signed-off-by: Tejun Heo <htejun@gmail.com>
This commit is contained in:
Tejun Heo
2008-04-07 22:47:22 +09:00
committed by Jeff Garzik
parent 48515f6c00
commit 071f44b1d2
8 changed files with 58 additions and 69 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/ata/libata-scsi.c
View File

@ -2617,7 +2617,7 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc)
static struct ata_device *ata_find_dev(struct ata_port *ap, int devno)
{
if (ap->nr_pmp_links == 0) {
if (!sata_pmp_attached(ap)) {
if (likely(devno < ata_link_max_devices(&ap->link)))
return &ap->link.device[devno];
} else {
@ -2634,7 +2634,7 @@ static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
int devno;
/* skip commands not addressed to targets we simulate */
if (ap->nr_pmp_links == 0) {
if (!sata_pmp_attached(ap)) {
if (unlikely(scsidev->channel || scsidev->lun))
return NULL;
devno = scsidev->id;
@ -3492,7 +3492,7 @@ static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
if (lun != SCAN_WILD_CARD && lun)
return -EINVAL;
if (ap->nr_pmp_links == 0) {
if (!sata_pmp_attached(ap)) {
if (channel != SCAN_WILD_CARD && channel)
return -EINVAL;
devno = id;