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    SubjectRe: [PATCH v0 08/42] Drivers: hv: vmbus: Check notifier registration return value
    On Mon, Nov 08, 2021 at 11:11:23AM +0100, Borislav Petkov wrote:
    > From: Borislav Petkov <bp@suse.de>
    >
    > Avoid homegrown notifier registration checks.
    >
    > No functional changes.
    >
    > Signed-off-by: Borislav Petkov <bp@suse.de>
    > Cc: linux-hyperv@vger.kernel.org

    Acked-by: Wei Liu <wei.liu@kernel.org>

    > ---
    > drivers/hv/vmbus_drv.c | 4 ++--
    > 1 file changed, 2 insertions(+), 2 deletions(-)
    >
    > diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
    > index 392c1ac4f819..370afd108d2d 100644
    > --- a/drivers/hv/vmbus_drv.c
    > +++ b/drivers/hv/vmbus_drv.c
    > @@ -1574,8 +1574,8 @@ static int vmbus_bus_init(void)
    > * the VMbus channel connection to prevent any VMbus
    > * activity after the VM panics.
    > */
    > - atomic_notifier_chain_register(&panic_notifier_list,
    > - &hyperv_panic_block);
    > + if (atomic_notifier_chain_register(&panic_notifier_list, &hyperv_panic_block))
    > + pr_warn("VMBus panic notifier already registered\n");
    >
    > vmbus_request_offers();
    >
    > --
    > 2.29.2
    >

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