ipr_init() will not call unregister_reboot_notifier() when
pci_register_driver() failed, which causes the WARNING. Call
unregister_reboot_notifier() when pci_register_driver() failed.
notifier callback ipr_halt [ipr] already registered
WARNING: CPU: 3 PID: 299 at kernel/notifier.c:29
notifier_chain_register+0x16d/0x230
Modules linked in: ipr(+) xhci_pci_renesas xhci_hcd ehci_hcd usbcore
led_class gpu_sched drm_buddy video wmi drm_ttm_helper ttm
drm_display_helper drm_kms_helper drm drm_panel_orientation_quirks
agpgart cfbft
CPU: 3 PID: 299 Comm: modprobe Tainted: G W
6.1.0-rc1-00190-g39508d23b672-dirty #332
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014
RIP: 0010:notifier_chain_register+0x16d/0x230
Call Trace:
<TASK>
__blocking_notifier_chain_register+0x73/0xb0
ipr_init+0x30/0x1000 [ipr]
do_one_initcall+0xdb/0x480
do_init_module+0x1cf/0x680
load_module+0x6a50/0x70a0
__do_sys_finit_module+0x12f/0x1c0
do_syscall_64+0x3f/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Fixes: f72919ec2bbb ("[SCSI] ipr: implement shutdown changes and remove obsolete write cache parameter")
Signed-off-by: Shang XiaoJing <shangxiaojing@xxxxxxxxxx>
---
drivers/scsi/ipr.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 9d01a3e3c26a..2022ffb45041 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -10872,11 +10872,19 @@ static struct notifier_block ipr_notifier = {
**/
static int __init ipr_init(void)
{
+ int rc;
+
ipr_info("IBM Power RAID SCSI Device Driver version: %s %s\n",
IPR_DRIVER_VERSION, IPR_DRIVER_DATE);
register_reboot_notifier(&ipr_notifier);
- return pci_register_driver(&ipr_driver);
+ rc = pci_register_driver(&ipr_driver);
+ if (rc) {
+ unregister_reboot_notifier(&ipr_notifier);
+ return rc;
+ }
+
+ return 0;
}
/**
--
2.17.1
