From: Cornelia Huck <cornelia.h...@de.ibm.com>
- Use tpi + tsch to get interrupts.
- Return an error if the irb indicates problems.
Signed-off-by: Cornelia Huck <cornelia.h...@de.ibm.com>
Signed-off-by: Alexander Graf <ag...@suse.de>
---
pc-bios/s390-ccw/virtio.c | 13 +++++++++++--
1 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
index 1968fc6..1bd17d4 100644
--- a/pc-bios/s390-ccw/virtio.c
+++ b/pc-bios/s390-ccw/virtio.c
@@ -38,12 +38,21 @@ static void virtio_notify(struct subchannel_id schid)
* Virtio functions *
***********************************************/
-static void drain_irqs(struct subchannel_id schid)
+static int drain_irqs(struct subchannel_id schid)
{
struct irb irb = {};
+ int r = 0;
+
while (1) {
+ /* FIXME: make use of TPI, for that enable subchannel and isc */
if (tsch(schid, &irb)) {
- return;
+ /* Might want to differentiate error codes later on. */
+ if (irb.scsw.cstat) {
+ r = -EIO;
+ } else if (irb.scsw.dstat != 0xc) {
+ r = -EIO;
+ }
+ return r;
}
}
}
--
1.6.0.2
