diff options
| -rw-r--r-- | block/copy-on-read.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/block/copy-on-read.c b/block/copy-on-read.c index 22f24fd0db..6631f30205 100644 --- a/block/copy-on-read.c +++ b/block/copy-on-read.c @@ -56,16 +56,14 @@ static void cor_child_perm(BlockDriverState *bs, BdrvChild *c, uint64_t perm, uint64_t shared, uint64_t *nperm, uint64_t *nshared) { - if (c == NULL) { - *nperm = (perm & PERM_PASSTHROUGH) | BLK_PERM_WRITE_UNCHANGED; - *nshared = (shared & PERM_PASSTHROUGH) | PERM_UNCHANGED; - return; - } + *nperm = perm & PERM_PASSTHROUGH; + *nshared = (shared & PERM_PASSTHROUGH) | PERM_UNCHANGED; - *nperm = (perm & PERM_PASSTHROUGH) | - (c->perm & PERM_UNCHANGED); - *nshared = (shared & PERM_PASSTHROUGH) | - (c->shared_perm & PERM_UNCHANGED); + /* We must not request write permissions for an inactive node, the child + * cannot provide it. */ + if (!(bs->open_flags & BDRV_O_INACTIVE)) { + *nperm |= BLK_PERM_WRITE_UNCHANGED; + } } |