4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Julian Wiedmann <jwi@xxxxxxxxxxxxx>
[ Upstream commit 4eb9eda6ba64114d98827e2870e024d5ab7cd35b ]
Use IS_ENABLED(CONFIG_IUCV) to determine whether the iucv_if symbol
is available, and let depmod deal with the module dependency.
This was introduced back with commit 6fcd61f7bf5d ("af_iucv: use
loadable iucv interface"). And to avoid sprinkling IS_ENABLED() over
all the code, we're keeping the indirection through pr_iucv->...().
Signed-off-by: Julian Wiedmann <jwi@xxxxxxxxxxxxx>
Signed-off-by: Karsten Graul <kgraul@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/iucv/af_iucv.c | 14 +++-----------
1 file changed, 3 insertions(+), 11 deletions(-)
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index d59f2341bfec..1ff2860dd3ff 100644
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -2477,7 +2477,7 @@ static int __init afiucv_init(void)
{
int err;
- if (MACHINE_IS_VM) {
+ if (MACHINE_IS_VM && IS_ENABLED(CONFIG_IUCV)) {
cpcmd("QUERY USERID", iucv_userid, sizeof(iucv_userid), &err);
if (unlikely(err)) {
WARN_ON(err);
@@ -2485,11 +2485,7 @@ static int __init afiucv_init(void)
goto out;
}
- pr_iucv = try_then_request_module(symbol_get(iucv_if), "iucv");
- if (!pr_iucv) {
- printk(KERN_WARNING "iucv_if lookup failed\n");
- memset(&iucv_userid, 0, sizeof(iucv_userid));
- }
+ pr_iucv = &iucv_if;
} else {
memset(&iucv_userid, 0, sizeof(iucv_userid));
pr_iucv = NULL;
@@ -2523,17 +2519,13 @@ static int __init afiucv_init(void)
out_proto:
proto_unregister(&iucv_proto);
out:
- if (pr_iucv)
- symbol_put(iucv_if);
return err;
}
static void __exit afiucv_exit(void)
{
- if (pr_iucv) {
+ if (pr_iucv)
afiucv_iucv_exit();
- symbol_put(iucv_if);
- }
unregister_netdevice_notifier(&afiucv_netdev_notifier);
dev_remove_pack(&iucv_packet_type);
--
2.43.0
