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ipmi: Retry BMC registration on a failure

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If the BMC fails to register, just set up to retry periodically.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
This commit is contained in:
Corey Minyard 2017-08-31 17:09:03 -05:00
parent b2cfd8ab4a
commit c0734bd594
1 changed files with 23 additions and 1 deletions
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24
drivers/char/ipmi/ipmi_msghandler.c
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@ -47,6 +47,7 @@
#include <linux/rcupdate.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/workqueue.h>
#define PFX "IPMI message handler: "
@ -430,6 +431,7 @@ struct ipmi_smi {
struct list_head bmc_link;
char *my_dev_name;
bool in_bmc_register; /* Handle recursive situations. Yuck. */
struct work_struct bmc_reg_work;
/*
* This is the lower-layer's sender routine. Note that you
@ -2275,7 +2277,8 @@ static int __bmc_get_device_id(ipmi_smi_t intf, struct bmc_device *bmc,
intf->bmc->id = id;
intf->bmc->dyn_guid_set = guid_set;
memcpy(intf->bmc->guid, guid, 16);
rv = __ipmi_bmc_register(intf, &id, guid_set, guid, intf_num);
if (__ipmi_bmc_register(intf, &id, guid_set, guid, intf_num))
need_waiter(intf); /* Retry later on an error. */
if (!intf_set) {
/*
@ -3276,6 +3279,16 @@ void ipmi_poll_interface(ipmi_user_t user)
}
EXPORT_SYMBOL(ipmi_poll_interface);
static void redo_bmc_reg(struct work_struct *work)
{
ipmi_smi_t intf = container_of(work, struct ipmi_smi, bmc_reg_work);
if (!intf->in_shutdown)
bmc_get_device_id(intf, NULL, NULL, NULL, NULL);
kref_put(&intf->refcount, intf_free);
}
int ipmi_register_smi(const struct ipmi_smi_handlers *handlers,
void *send_info,
struct device *si_dev,
@ -3315,6 +3328,7 @@ int ipmi_register_smi(const struct ipmi_smi_handlers *handlers,
mutex_init(&intf->bmc_reg_mutex);
intf->intf_num = -1; /* Mark it invalid for now. */
kref_init(&intf->refcount);
INIT_WORK(&intf->bmc_reg_work, redo_bmc_reg);
intf->si_dev = si_dev;
for (j = 0; j < IPMI_MAX_CHANNELS; j++) {
intf->channels[j].address = IPMI_BMC_SLAVE_ADDR;
@ -4641,6 +4655,14 @@ static unsigned int ipmi_timeout_handler(ipmi_smi_t intf,
int i;
unsigned int waiting_msgs = 0;
if (!intf->bmc_registered) {
kref_get(&intf->refcount);
if (!schedule_work(&intf->bmc_reg_work)) {
kref_put(&intf->refcount, intf_free);
waiting_msgs++;
}
}
/*
* Go through the seq table and find any messages that
* have timed out, putting them in the timeouts