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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2013-11-06 12:24:02 +0400 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2013-11-08 20:10:31 +0400 |
| commit | 49c2856af779bb1a36fa598804e4c0b2251fae57 (patch) | |
| tree | 6293d409321ebde9c07d9eea23ffcb4c95fdcf46 /drivers/block | |
| parent | bfe11d6de1c416cea4f3f0f35f864162063ce3fa (diff) | |
| download | linux-49c2856af779bb1a36fa598804e4c0b2251fae57.tar.xz | |
pktcdvd: debugfs functions return NULL on error
My static checker complains correctly that this is potential NULL
dereference because debugfs functions return NULL on error. They return
an ERR_PTR if they are configured out.
We don't need to check for ERR_PTR because if debugfs is stubbed out the
dummy functions won't complain about that. We don't need to check the
values before calling debugfs_remove() because that accepts ERR_PTRs and
NULL pointers.
We don't need to set pkt->dfs_f_info to NULL in pkt_debugfs_dev_new()
because it was initialized with kzalloc() so I have removed that.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/pktcdvd.c | 22 |
1 files changed, 4 insertions, 18 deletions
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c index 56188475cfd3..ff8668c5efb1 100644 --- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -473,45 +473,31 @@ static void pkt_debugfs_dev_new(struct pktcdvd_device *pd) { if (!pkt_debugfs_root) return; - pd->dfs_f_info = NULL; pd->dfs_d_root = debugfs_create_dir(pd->name, pkt_debugfs_root); - if (IS_ERR(pd->dfs_d_root)) { - pd->dfs_d_root = NULL; + if (!pd->dfs_d_root) return; - } + pd->dfs_f_info = debugfs_create_file("info", S_IRUGO, pd->dfs_d_root, pd, &debug_fops); - if (IS_ERR(pd->dfs_f_info)) { - pd->dfs_f_info = NULL; - return; - } } static void pkt_debugfs_dev_remove(struct pktcdvd_device *pd) { if (!pkt_debugfs_root) return; - if (pd->dfs_f_info) - debugfs_remove(pd->dfs_f_info); + debugfs_remove(pd->dfs_f_info); + debugfs_remove(pd->dfs_d_root); pd->dfs_f_info = NULL; - if (pd->dfs_d_root) - debugfs_remove(pd->dfs_d_root); pd->dfs_d_root = NULL; } static void pkt_debugfs_init(void) { pkt_debugfs_root = debugfs_create_dir(DRIVER_NAME, NULL); - if (IS_ERR(pkt_debugfs_root)) { - pkt_debugfs_root = NULL; - return; - } } static void pkt_debugfs_cleanup(void) { - if (!pkt_debugfs_root) - return; debugfs_remove(pkt_debugfs_root); pkt_debugfs_root = NULL; } |