diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/xen-blkback/blkback.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c index 3e84d59724a2..f9dfcd8872af 100644 --- a/drivers/block/xen-blkback/blkback.c +++ b/drivers/block/xen-blkback/blkback.c @@ -825,8 +825,11 @@ again: pages[i]->page = persistent_gnt->page; pages[i]->persistent_gnt = persistent_gnt; } else { - if (get_free_page(blkif, &pages[i]->page)) - goto out_of_memory; + if (get_free_page(blkif, &pages[i]->page)) { + put_free_pages(blkif, pages_to_gnt, segs_to_map); + ret = -ENOMEM; + goto out; + } addr = vaddr(pages[i]->page); pages_to_gnt[segs_to_map] = pages[i]->page; pages[i]->persistent_gnt = NULL; @@ -910,15 +913,18 @@ next: } segs_to_map = 0; last_map = map_until; - if (map_until != num) + if (!ret && map_until != num) goto again; - return ret; +out: + for (i = last_map; i < num; i++) { + /* Don't zap current batch's valid persistent grants. */ + if(i >= last_map + segs_to_map) + pages[i]->persistent_gnt = NULL; + pages[i]->handle = BLKBACK_INVALID_HANDLE; + } -out_of_memory: - pr_alert("%s: out of memory\n", __func__); - put_free_pages(blkif, pages_to_gnt, segs_to_map); - return -ENOMEM; + return ret; } static int xen_blkbk_map_seg(struct pending_req *pending_req) |