Jan Beulich
2009-Jan-28 12:27 UTC
[Xen-devel] [PATCH] linux/netback: unmap tx ring gref when mapping of rx ring gref failed
As usual, written and tested on 2.6.27.12 and made apply to the 2.6.18
tree without further testing.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
--- head-2009-01-21.orig/drivers/xen/netback/interface.c 2008-12-01
12:10:26.000000000 +0100
+++ head-2009-01-21/drivers/xen/netback/interface.c 2009-01-26
14:49:11.000000000 +0100
@@ -219,6 +219,13 @@ static int map_frontend_pages(
BUG();
if (op.status) {
+ struct gnttab_unmap_grant_ref unop;
+
+ gnttab_set_unmap_op(&unop,
+ (unsigned long)netif->tx_comms_area->addr,
+ GNTMAP_host_map, netif->tx_shmem_handle);
+ VOID(HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref,
+ &unop, 1));
DPRINTK(" Gnttab failure mapping rx_ring_ref!\n");
return op.status;
}
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