diff options
| -rw-r--r-- | tools/libxc/xc_mem_paging.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/tools/libxc/xc_mem_paging.c b/tools/libxc/xc_mem_paging.c index f16d16b3ab..a108a5c4cf 100644 --- a/tools/libxc/xc_mem_paging.c +++ b/tools/libxc/xc_mem_paging.c @@ -68,23 +68,28 @@ int xc_mem_paging_prep(xc_interface *xch, domid_t domain_id, unsigned long gfn) int xc_mem_paging_load(xc_interface *xch, domid_t domain_id, unsigned long gfn, void *buffer) { - int rc; + int rc, old_errno; + + errno = -EINVAL; if ( !buffer ) - return -EINVAL; + return -1; if ( ((unsigned long) buffer) & (XC_PAGE_SIZE - 1) ) - return -EINVAL; + return -1; if ( mlock(buffer, XC_PAGE_SIZE) ) - return -errno; + return -1; rc = xc_mem_event_control(xch, domain_id, XEN_DOMCTL_MEM_EVENT_OP_PAGING_PREP, XEN_DOMCTL_MEM_EVENT_OP_PAGING, buffer, NULL, gfn); - (void)munlock(buffer, XC_PAGE_SIZE); + old_errno = errno; + munlock(buffer, XC_PAGE_SIZE); + errno = old_errno; + return rc; } |