[RFC PATCH v2 1/7] vfio-ccw: Return IOINST_CC_NOT_OPERATIONAL for EIO

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

From: Farhan Ali <alifm@linux.ibm.com>

EIO is returned by vfio-ccw mediated device when the backing
host subchannel is not operational anymore. So return cc=3
back to the guest, rather than returning a unit check.
This way the guest can take appropriate action such as
issue an 'stsch'.

Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Eric Farman <farman@linux.ibm.com>
---

Notes:
    v1->v2: [EF]
     - Add s-o-b
     - [Seems the discussion on v1 centered on the return code
       set in the kernel, rather than anything that needs to
       change here, unless I've missed something.]

 hw/vfio/ccw.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
index 50cc2ec75c..19144ecfc7 100644
--- a/hw/vfio/ccw.c
+++ b/hw/vfio/ccw.c
@@ -114,6 +114,7 @@ again:
         return IOINST_CC_BUSY;
     case -ENODEV:
     case -EACCES:
+    case -EIO:
         return IOINST_CC_NOT_OPERATIONAL;
     case -EFAULT:
     default:
-- 
2.17.1