diff options
| author |   Corey Minyard <cminyard@mvista.com> | 2017-09-01 15:34:10 -0500 |
|---|---|---|
| committer | Corey Minyard <cminyard@mvista.com> | 2017-09-27 16:03:45 -0500 |
| commit | c659ff34f6303077efd45de884c5cab734b29df5 (patch) | |
| tree | dc52d78a6c8639d64ff5ca8d71007effcf35b026 /drivers/char | |
| parent | ipmi: Dynamically fetch GUID periodically (diff) | |
| download | linux-dev-c659ff34f6303077efd45de884c5cab734b29df5.tar.xz linux-dev-c659ff34f6303077efd45de884c5cab734b29df5.zip | |
ipmi: Use a temporary BMC for an interface
This is getting ready for the ability to redo the BMC if it's
information changes, we need a fallback mechanism.
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/ipmi/ipmi_msghandler.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c index 98318b965de7..9d4a9a94fdc6 100644 --- a/drivers/char/ipmi/ipmi_msghandler.c +++ b/drivers/char/ipmi/ipmi_msghandler.c @@ -418,6 +418,7 @@ struct ipmi_smi { */ struct mutex bmc_reg_mutex; + struct bmc_device tmp_bmc; struct bmc_device *bmc; bool bmc_registered; struct list_head bmc_link; @@ -2839,7 +2840,7 @@ static void ipmi_bmc_unregister(ipmi_smi_t intf) mutex_lock(&bmc->dyn_mutex); list_del(&intf->bmc_link); mutex_unlock(&bmc->dyn_mutex); - intf->bmc = NULL; + intf->bmc = &intf->tmp_bmc; mutex_lock(&ipmidriver_mutex); kref_put(&bmc->usecount, cleanup_bmc_device); mutex_unlock(&ipmidriver_mutex); @@ -2872,7 +2873,6 @@ static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum) * otherwise register the new BMC device */ if (old_bmc) { - kfree(bmc); bmc = old_bmc; intf->bmc = old_bmc; mutex_lock(&bmc->dyn_mutex); @@ -2886,6 +2886,14 @@ static int ipmi_bmc_register(ipmi_smi_t intf, int ifnum) bmc->id.product_id, bmc->id.device_id); } else { + bmc = kzalloc(sizeof(*bmc), GFP_KERNEL); + if (!bmc) { + rv = -ENOMEM; + goto out; + } + INIT_LIST_HEAD(&bmc->intfs); + mutex_init(&bmc->dyn_mutex); + bmc->pdev.name = "ipmi_bmc"; rv = ida_simple_get(&ipmi_bmc_ida, 0, 0, GFP_KERNEL); @@ -2968,7 +2976,7 @@ out_put_bmc: mutex_lock(&bmc->dyn_mutex); list_del(&intf->bmc_link); mutex_unlock(&bmc->dyn_mutex); - intf->bmc = NULL; + intf->bmc = &intf->tmp_bmc; mutex_lock(&ipmidriver_mutex); kref_put(&bmc->usecount, cleanup_bmc_device); mutex_unlock(&ipmidriver_mutex); @@ -2978,7 +2986,7 @@ out_list_del: mutex_lock(&bmc->dyn_mutex); list_del(&intf->bmc_link); mutex_unlock(&bmc->dyn_mutex); - intf->bmc = NULL; + intf->bmc = &intf->tmp_bmc; put_device(&bmc->pdev.dev); goto out; } @@ -3204,11 +3212,7 @@ int ipmi_register_smi(const struct ipmi_smi_handlers *handlers, if (!intf) return -ENOMEM; - intf->bmc = kzalloc(sizeof(*intf->bmc), GFP_KERNEL); - if (!intf->bmc) { - kfree(intf); - return -ENOMEM; - } + intf->bmc = &intf->tmp_bmc; INIT_LIST_HEAD(&intf->bmc->intfs); mutex_init(&intf->bmc->dyn_mutex); INIT_LIST_HEAD(&intf->bmc_link); |