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platform/chrome: cros_usbpd_notify: Fix error handling in cros_usbpd_notify_init()

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The following WARNING message was given when rmmod cros_usbpd_notify:

 Unexpected driver unregister!
 WARNING: CPU: 0 PID: 253 at drivers/base/driver.c:270 driver_unregister+0x8a/0xb0
 Modules linked in: cros_usbpd_notify(-)
 CPU: 0 PID: 253 Comm: rmmod Not tainted 6.1.0-rc3 #24
 ...
 Call Trace:
  <TASK>
  cros_usbpd_notify_exit+0x11/0x1e [cros_usbpd_notify]
  __x64_sys_delete_module+0x3c7/0x570
  ? __ia32_sys_delete_module+0x570/0x570
  ? lock_is_held_type+0xe3/0x140
  ? syscall_enter_from_user_mode+0x17/0x50
  ? rcu_read_lock_sched_held+0xa0/0xd0
  ? syscall_enter_from_user_mode+0x1c/0x50
  do_syscall_64+0x37/0x90
  entry_SYSCALL_64_after_hwframe+0x63/0xcd
 RIP: 0033:0x7f333fe9b1b7

The reason is that the cros_usbpd_notify_init() does not check the return
value of platform_driver_register(), and the cros_usbpd_notify can
install successfully even if platform_driver_register() failed.

Fix by checking the return value of platform_driver_register() and
unregister cros_usbpd_notify_plat_driver when it failed.

Fixes: ec2daf6e33 ("platform: chrome: Add cros-usbpd-notify driver")
Signed-off-by: Yuan Can <yuancan@huawei.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Link: https://lore.kernel.org/r/20221117080823.77549-1-yuancan@huawei.com
Signed-off-by: Prashant Malani <pmalani@chromium.org>
This commit is contained in:
Yuan Can 2022-11-17 08:08:23 +00:00 committed by Prashant Malani
parent f9e510dc92
commit 5a2d966236
1 changed files with 5 additions and 1 deletions
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6
drivers/platform/chrome/cros_usbpd_notify.c
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@ -239,7 +239,11 @@ static int __init cros_usbpd_notify_init(void)
return ret;
#ifdef CONFIG_ACPI
platform_driver_register(&cros_usbpd_notify_acpi_driver);
ret = platform_driver_register(&cros_usbpd_notify_acpi_driver);
if (ret) {
platform_driver_unregister(&cros_usbpd_notify_plat_driver);
return ret;
}
#endif
return 0;
}