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[Xen-devel] [PATCH v2 1/3] xen: fix usage of ENODATA

ENODATA doesn't exist on FreeBSD, so ENODATA errors returned by the
hypervisor are translated to ENOENT.

Also, the error code is returned in errno if the call returns -1, so
compare the error code with the value in errno instead of the value
returned by the function.

Signed-off-by: Roger Pau Monnà <roger.pau@xxxxxxxxxx>
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Cc: Anthony Perard <anthony.perard@xxxxxxxxxx>
Changes since v1:
 - Define ENODATA to ENOENT for platforms that don't have ENODATA.
 xen-hvm.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/xen-hvm.c b/xen-hvm.c
index a64486c..a414105 100644
--- a/xen-hvm.c
+++ b/xen-hvm.c
@@ -499,11 +499,14 @@ static void xen_sync_dirty_bitmap(XenIOState *state,
                                  start_addr >> TARGET_PAGE_BITS, npages,
     if (rc < 0) {
-        if (rc != -ENODATA) {
+#ifndef ENODATA
+        if (errno == ENODATA) {
             memory_region_set_dirty(framebuffer, 0, size);
             DPRINTF("xen: track_dirty_vram failed (0x" TARGET_FMT_plx
                     ", 0x" TARGET_FMT_plx "): %s\n",
-                    start_addr, start_addr + size, strerror(-rc));
+                    start_addr, start_addr + size, strerror(errno));
-- (Apple Git-26)

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