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authorDan Carpenter <dan.carpenter@oracle.com>2013-11-06 09:24:02 +0100
committerJens Axboe <axboe@kernel.dk>2013-11-08 09:10:31 -0700
commit49c2856af779bb1a36fa598804e4c0b2251fae57 (patch)
tree6293d409321ebde9c07d9eea23ffcb4c95fdcf46 /drivers/block/pktcdvd.c
parentbfe11d6de1c416cea4f3f0f35f864162063ce3fa (diff)
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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/pktcdvd.c')
-rw-r--r--drivers/block/pktcdvd.c22
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;
}