diff options
| author | Max Reitz <mreitz@redhat.com> | 2014-05-29 00:19:54 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2014-08-15 15:07:16 +0200 |
| commit | 8fcffa9853473ab148d36858f15c5531161a1824 (patch) | |
| tree | b844c551834c0cf1bc1960ce0f751d1cc6a348e0 /block/qcow2-refcount.c | |
| parent | 7504edf477d2bac9cbf53225811ec595abf045e4 (diff) | |
qcow2: Return useful error code in refcount_init()
If bdrv_pread() returns an error, it is very unlikely that it was
ENOMEM. In this case, the return value should be passed along; as
bdrv_pread() will always either return the number of bytes read or a
negative value (the error code), the condition for checking whether
bdrv_pread() failed can be simplified (and clarified) as well.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
Diffstat (limited to 'block/qcow2-refcount.c')
| -rw-r--r-- | block/qcow2-refcount.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index 87a56d84af..d60e2feb10 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -50,19 +50,21 @@ int qcow2_refcount_init(BlockDriverState *bs) if (s->refcount_table_size > 0) { if (s->refcount_table == NULL) { + ret = -ENOMEM; goto fail; } BLKDBG_EVENT(bs->file, BLKDBG_REFTABLE_LOAD); ret = bdrv_pread(bs->file, s->refcount_table_offset, s->refcount_table, refcount_table_size2); - if (ret != refcount_table_size2) + if (ret < 0) { goto fail; + } for(i = 0; i < s->refcount_table_size; i++) be64_to_cpus(&s->refcount_table[i]); } return 0; fail: - return -ENOMEM; + return ret; } void qcow2_refcount_close(BlockDriverState *bs) |