[Xen-devel] [PATCH v2] libxl: Don't ignore error when we fail to give access to ioport/irq/iomem

[Julien Grall <julien.grall@xxxxxxxxxx>]

If we fail to give the access, the domain will unlikely work correctly.
So we should bail out at the first error.

Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>

---
This patch is candidate for a backport for at least Xen 4.4 and Xen 4.5.

    Changes in v2:
        - Also bail out when libxl fails to give access to iomem
---
 tools/libxl/libxl_create.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
index 1198225..6f87d1c 100644
--- a/tools/libxl/libxl_create.c
+++ b/tools/libxl/libxl_create.c
@@ -1167,6 +1167,7 @@ static void domcreate_launch_dm(libxl__egc *egc, 
libxl__multidev *multidev,
                  "failed give dom%d access to ioports %"PRIx32"-%"PRIx32,
                  domid, io->first, io->first + io->number - 1);
             ret = ERROR_FAIL;
+            goto error_out;
         }
     }
 
@@ -1182,6 +1183,7 @@ static void domcreate_launch_dm(libxl__egc *egc, 
libxl__multidev *multidev,
         if (ret < 0) {
             LOGE(ERROR, "failed give dom%d access to irq %d", domid, irq);
             ret = ERROR_FAIL;
+            goto error_out;
         }
     }
 
@@ -1198,7 +1200,7 @@ static void domcreate_launch_dm(libxl__egc *egc, 
libxl__multidev *multidev,
                  "failed give dom%d access to iomem range %"PRIx64"-%"PRIx64,
                  domid, io->start, io->start + io->number - 1);
             ret = ERROR_FAIL;
-            continue;
+            goto error_out;
         }
         ret = xc_domain_memory_mapping(CTX->xch, domid,
                                        io->gfn, io->start,
@@ -1209,6 +1211,7 @@ static void domcreate_launch_dm(libxl__egc *egc, 
libxl__multidev *multidev,
                  " to guest address %"PRIx64,
                  domid, io->start, io->start + io->number - 1, io->gfn);
             ret = ERROR_FAIL;
+            goto error_out;
         }
     }
 
-- 
2.1.4


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