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ipmi_si: fix unexpected driver unregister warning 

If ipmi_si_platform_init()->platform_driver_register() fails,
platform_driver_unregister() called unconditionally will trigger
following warning,

ipmi_platform: Unable to register driver: -12
------------[ cut here ]------------
Unexpected driver unregister!
WARNING: CPU: 1 PID: 7210 at drivers/base/driver.c:193 driver_unregister+0x60/0x70 drivers/base/driver.c:193

Fix it by adding platform_registered variable, only unregister platform
driver when it is already successfully registered.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Message-Id: <20190517101245.4341-1-wangkefeng.wang@huawei.com>

Signed-off-by: Corey Minyard <cminyard@mvista.com>
This commit is contained in:
Kefeng Wang 2019-05-17 18:12:44 +08:00 committed by Corey Minyard
parent a188339ca5
commit 2f66353963
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/char/ipmi/ipmi_si_platform.c
View File

@ -19,6 +19,7 @@
#include "ipmi_si.h"
#include "ipmi_dmi.h"
static bool platform_registered;
static bool si_tryplatform = true;
#ifdef CONFIG_ACPI
static bool si_tryacpi = true;
@ -469,9 +470,12 @@ void ipmi_si_platform_init(void)
int rv = platform_driver_register(&ipmi_platform_driver);
if (rv)
pr_err("Unable to register driver: %d\n", rv);
else
platform_registered = true;
}
void ipmi_si_platform_shutdown(void)
{
platform_driver_unregister(&ipmi_platform_driver);
if (platform_registered)
platform_driver_unregister(&ipmi_platform_driver);
}