From: Borislav Petkov <bp@xxxxxxx>
Avoid homegrown notifier registration checks.
No functional changes.
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Cc: linux-fbdev@xxxxxxxxxxxxxxx
Cc: linux-hyperv@xxxxxxxxxxxxxxx
---
drivers/video/console/dummycon.c | 3 ++-
drivers/video/fbdev/hyperv_fb.c | 5 +++--
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/video/console/dummycon.c b/drivers/video/console/dummycon.c
index f1711b2f9ff0..2d0cdd76dfde 100644
--- a/drivers/video/console/dummycon.c
+++ b/drivers/video/console/dummycon.c
@@ -36,7 +36,8 @@ void dummycon_register_output_notifier(struct notifier_block *nb)
{
WARN_CONSOLE_UNLOCKED();
- raw_notifier_chain_register(&dummycon_output_nh, nb);
+ if (raw_notifier_chain_register(&dummycon_output_nh, nb))
+ pr_warn("dummycon output notifier already registered\n");
if (dummycon_putc_called)
nb->notifier_call(nb, 0, NULL);
diff --git a/drivers/video/fbdev/hyperv_fb.c b/drivers/video/fbdev/hyperv_fb.c
index 23999df52739..183bd459e5c2 100644
--- a/drivers/video/fbdev/hyperv_fb.c
+++ b/drivers/video/fbdev/hyperv_fb.c
@@ -1255,8 +1255,9 @@ static int hvfb_probe(struct hv_device *hdev,
par->synchronous_fb = false;
par->hvfb_panic_nb.notifier_call = hvfb_on_panic;
- atomic_notifier_chain_register(&panic_notifier_list,
- &par->hvfb_panic_nb);
+
+ if (atomic_notifier_chain_register(&panic_notifier_list, &par->hvfb_panic_nb))
+ pr_warn("Hyper-V FB panic notifier already registered\n");
return 0;
--
2.29.2
