[PULL 26/33] pc-bios/s390-ccw: Use bus specific IPL_TYPE directly for scsi IPL

[Eric Farman <farman@linux.ibm.com>]

From: Jared Rossi <jrossi@linux.ibm.com>

All existing switch cases that handle S390_IPL_TYPE_QEMU_SCSI directly fall
through to S390_IPL_TYPE_CCW.  Rather than always fall through, reassign
vdev->ipl_type to the appropriate bus for the scsi controller and proceed
as usual, where the bus is designated by the "bus" field and set during
the IPLB build.

Because S390_IPL_TYPE_QEMU_SCSI should not appear as an ipl_type once the
device is found, remove that specific case from other existing switches
and allow it to land in the default case, which will generally result
in an immediate error.

Reviewed-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Jared Rossi <jrossi@linux.ibm.com>
Reviewed-by: Jason J. Herne <jjherne@linux.ibm.com>
Link: https://lore.kernel.org/qemu-devel/20260831194919.3830270-4-jrossi@linux.ibm.com
Signed-off-by: Eric Farman <farman@linux.ibm.com>
---
 pc-bios/s390-ccw/main.c          | 13 ++++++++++---
 pc-bios/s390-ccw/virtio-blkdev.c |  1 -
 pc-bios/s390-ccw/virtio.c        |  5 -----
 3 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index 8fc1cbf653..6ab2b8f75b 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -261,8 +261,16 @@ static bool find_boot_device(void)
         vdev->selected_scsi_device.channel = iplb->scsi.channel;
         vdev->selected_scsi_device.target = iplb->scsi.target;
         vdev->selected_scsi_device.lun = iplb->scsi.lun;
-        blk_schid.ssid = iplb->scsi.ssid & 0x3;
-        found = find_subch(iplb->scsi.devno);
+        vdev->ipl_type = iplb->scsi.bus;
+        switch (vdev->ipl_type) {
+        case S390_IPL_TYPE_CCW:
+            blk_schid.ssid = iplb->scsi.ssid & 0x3;
+            found = find_subch(iplb->scsi.devno);
+            break;
+        default:
+            puts("Unrecognized SCSI controller");
+            break;
+        }
         break;
      case S390_IPL_TYPE_PCI:
         found = find_fid(iplb->pci.fid);
@@ -346,7 +354,6 @@ static void ipl_pci_device(void)
 static void ipl_boot_device(void)
 {
     switch (virtio_get_device()->ipl_type) {
-    case S390_IPL_TYPE_QEMU_SCSI:
     case S390_IPL_TYPE_CCW:
         ipl_ccw_device();
         break;
diff --git a/pc-bios/s390-ccw/virtio-blkdev.c b/pc-bios/s390-ccw/virtio-blkdev.c
index 98b6cec3a0..83a1185dd5 100644
--- a/pc-bios/s390-ccw/virtio-blkdev.c
+++ b/pc-bios/s390-ccw/virtio-blkdev.c
@@ -253,7 +253,6 @@ int virtio_blk_setup_device(VDev *vdev)
     puts("Using virtio-blk.");
 
     switch (vdev->ipl_type) {
-    case S390_IPL_TYPE_QEMU_SCSI:
     case S390_IPL_TYPE_CCW:
         return virtio_ccw_setup(vdev);
     case S390_IPL_TYPE_PCI:
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
index a0d249db24..0b33544144 100644
--- a/pc-bios/s390-ccw/virtio.c
+++ b/pc-bios/s390-ccw/virtio.c
@@ -61,7 +61,6 @@ char *virtio_get_ring_area(int ring_num)
 int drain_irqs(void)
 {
     switch (vdev.ipl_type) {
-    case S390_IPL_TYPE_QEMU_SCSI:
     case S390_IPL_TYPE_CCW:
         return drain_irqs_ccw(vdev.schid);
     default:
@@ -109,7 +108,6 @@ void vring_init(VRing *vr, VqInfo *info)
 bool vring_notify(VRing *vr)
 {
     switch (vdev.ipl_type) {
-    case S390_IPL_TYPE_QEMU_SCSI:
     case S390_IPL_TYPE_CCW:
         vr->cookie = virtio_ccw_notify(vdev.schid, vr->id, vr->cookie);
         break;
@@ -130,7 +128,6 @@ bool vring_notify(VRing *vr)
 bool be_ipl(void)
 {
     switch (virtio_get_device()->ipl_type) {
-    case S390_IPL_TYPE_QEMU_SCSI:
     case S390_IPL_TYPE_CCW:
         return true;
     case S390_IPL_TYPE_PCI:
@@ -231,7 +228,6 @@ int vring_wait_reply(void)
 int virtio_reset(VDev *vdev)
 {
     switch (vdev->ipl_type) {
-    case S390_IPL_TYPE_QEMU_SCSI:
     case S390_IPL_TYPE_CCW:
         return virtio_ccw_reset(vdev);
     case S390_IPL_TYPE_PCI:
@@ -244,7 +240,6 @@ int virtio_reset(VDev *vdev)
 bool virtio_is_supported(VDev *vdev)
 {
     switch (vdev->ipl_type) {
-    case S390_IPL_TYPE_QEMU_SCSI:
     case S390_IPL_TYPE_CCW:
         return virtio_ccw_is_supported(vdev);
     case S390_IPL_TYPE_PCI:
-- 
2.55.0