| From | Borislav Petkov <> | Subject | [PATCH v0 17/42] drivers: video: Check notifier registration return value | Date | Mon, 8 Nov 2021 11:11:32 +0100 |
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From: Borislav Petkov <bp@suse.de>
Avoid homegrown notifier registration checks.
No functional changes.
Signed-off-by: Borislav Petkov <bp@suse.de> Cc: linux-fbdev@vger.kernel.org Cc: linux-hyperv@vger.kernel.org --- 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
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