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ipmi_ssif: fix unexpected driver unregister warning 

If platform_driver_register() fails from init_ipmi_ssif(),
platform_driver_unregister() called unconditionally will
trigger following warning,

ipmi_ssif: Unable to register driver: -12
------------[ cut here ]------------
Unexpected driver unregister!
WARNING: CPU: 1 PID: 6305 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: <20190524143724.43218-1-wangkefeng.wang@huawei.com>

Signed-off-by: Corey Minyard <cminyard@mvista.com>
This commit is contained in:
Kefeng Wang 2019-05-24 22:37:24 +08:00 committed by Corey Minyard
parent dd7450cab7
commit 2cd0e54489
1 changed files with 4 additions and 1 deletions
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5
drivers/char/ipmi/ipmi_ssif.c
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@ -303,6 +303,7 @@ struct ssif_info {
((unsigned int) atomic_read(&(ssif)->stats[SSIF_STAT_ ## stat]))
static bool initialized;
static bool platform_registered;
static void return_hosed_msg(struct ssif_info *ssif_info,
struct ipmi_smi_msg *msg);
@ -2088,6 +2089,8 @@ static int init_ipmi_ssif(void)
rv = platform_driver_register(&ipmi_driver);
if (rv)
pr_err("Unable to register driver: %d\n", rv);
else
platform_registered = true;
}
ssif_i2c_driver.address_list = ssif_address_list();
@ -2111,7 +2114,7 @@ static void cleanup_ipmi_ssif(void)
kfree(ssif_i2c_driver.address_list);
if (ssif_trydmi)
if (ssif_trydmi && platform_registered)
platform_driver_unregister(&ipmi_driver);
free_ssif_clients();