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fs: dlm: use list_first_entry_or_null

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Instead of check on list_empty() we can do the same with
list_first_entry_or_null() and return NULL if the returned value is NULL.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
Alexander Aring 2022-11-17 17:11:48 -05:00 committed by David Teigland
parent 01ea3d7701
commit dd070a56e0
1 changed files with 3 additions and 6 deletions
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9
fs/dlm/lowcomms.c
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@ -214,15 +214,12 @@ static struct writequeue_entry *con_next_wq(struct connection *con)
{
struct writequeue_entry *e;
if (list_empty(&con->writequeue))
return NULL;
e = list_first_entry(&con->writequeue, struct writequeue_entry,
list);
e = list_first_entry_or_null(&con->writequeue, struct writequeue_entry,
list);
/* if len is zero nothing is to send, if there are users filling
* buffers we wait until the users are done so we can send more.
*/
if (e->users || e->len == 0)
if (!e || e->users || e->len == 0)
return NULL;
return e;