diff options
| author | Kefeng Wang <wangkefeng.wang@huawei.com> | 2019-05-24 22:37:24 +0800 |
|---|---|---|
| committer | Corey Minyard <cminyard@mvista.com> | 2019-05-24 10:04:27 -0500 |
| commit | 2cd0e54489e65b8e22124a8b053aff40815487f7 (patch) | |
| tree | ad8f121cb8a4a00922b0b29eb8b8837cbad7f9a9 /drivers/char | |
| parent | dd7450cab71174637329e5ef57d8474fc7ff2ea0 (diff) | |
| download | linux-2cd0e54489e65b8e22124a8b053aff40815487f7.tar.bz2 | |
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>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/ipmi/ipmi_ssif.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/char/ipmi/ipmi_ssif.c b/drivers/char/ipmi/ipmi_ssif.c index cf8156d6bc07..305fa5054274 100644 --- a/drivers/char/ipmi/ipmi_ssif.c +++ b/drivers/char/ipmi/ipmi_ssif.c @@ -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(); |