netfs: Make netfs_put_request() handle a NULL pointer

Make netfs_put_request() just return if given a NULL request pointer.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
This commit is contained in:
David Howells 2023-09-29 14:35:17 +01:00
parent c6dc54dd91
commit 6ba22d8d15

View File

@ -106,19 +106,22 @@ static void netfs_free_request(struct work_struct *work)
void netfs_put_request(struct netfs_io_request *rreq, bool was_async,
enum netfs_rreq_ref_trace what)
{
unsigned int debug_id = rreq->debug_id;
unsigned int debug_id;
bool dead;
int r;
dead = __refcount_dec_and_test(&rreq->ref, &r);
trace_netfs_rreq_ref(debug_id, r - 1, what);
if (dead) {
if (was_async) {
rreq->work.func = netfs_free_request;
if (!queue_work(system_unbound_wq, &rreq->work))
BUG();
} else {
netfs_free_request(&rreq->work);
if (rreq) {
debug_id = rreq->debug_id;
dead = __refcount_dec_and_test(&rreq->ref, &r);
trace_netfs_rreq_ref(debug_id, r - 1, what);
if (dead) {
if (was_async) {
rreq->work.func = netfs_free_request;
if (!queue_work(system_unbound_wq, &rreq->work))
BUG();
} else {
netfs_free_request(&rreq->work);
}
}
}
}