ipmi: split device discovery and registration
The ipmi spec indicates that we should only make use of one si per bmc, so
separate device discovery and registration to make that possible.
[thenzl@redhat.com: fix mutex use]
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 93ab758..3f2a490 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -308,6 +308,7 @@
static int unload_when_empty = 1;
+static int add_smi(struct smi_info *smi);
static int try_smi_init(struct smi_info *smi);
static void cleanup_one_si(struct smi_info *to_clean);
@@ -1785,7 +1786,9 @@
info->irq_setup = std_irq_setup;
info->slave_addr = ipmb;
- try_smi_init(info);
+ if (!add_smi(info))
+ if (try_smi_init(info))
+ cleanup_one_si(info);
} else {
/* remove */
struct smi_info *e, *tmp_e;
@@ -1871,7 +1874,9 @@
info->irq_setup = std_irq_setup;
info->slave_addr = slave_addrs[i];
- try_smi_init(info);
+ if (!add_smi(info))
+ if (try_smi_init(info))
+ cleanup_one_si(info);
}
}
@@ -2069,7 +2074,7 @@
}
info->io.addr_data = spmi->addr.address;
- try_smi_init(info);
+ add_smi(info);
return 0;
}
@@ -2167,7 +2172,7 @@
info->dev = &acpi_dev->dev;
pnp_set_drvdata(dev, info);
- return try_smi_init(info);
+ return add_smi(info);
err_free:
kfree(info);
@@ -2326,7 +2331,7 @@
if (info->irq)
info->irq_setup = std_irq_setup;
- try_smi_init(info);
+ add_smi(info);
}
static void __devinit dmi_find_bmc(void)
@@ -2429,7 +2434,7 @@
info->dev = &pdev->dev;
pci_set_drvdata(pdev, info);
- return try_smi_init(info);
+ return add_smi(info);
}
static void __devexit ipmi_pci_remove(struct pci_dev *pdev)
@@ -2542,7 +2547,7 @@
dev_set_drvdata(&dev->dev, info);
- return try_smi_init(info);
+ return add_smi(info);
}
static int __devexit ipmi_of_remove(struct of_device *dev)
@@ -2971,14 +2976,16 @@
info->io.regsize = DEFAULT_REGSPACING;
info->io.regshift = 0;
- if (try_smi_init(info) == 0) {
- /* Found one... */
- printk(KERN_INFO "ipmi_si: Found default %s state"
- " machine at %s address 0x%lx\n",
- si_to_str[info->si_type],
- addr_space_to_str[info->io.addr_type],
- info->io.addr_data);
- return;
+ if (add_smi(info) == 0) {
+ if ((try_smi_init(info)) == 0) {
+ /* Found one... */
+ printk(KERN_INFO "ipmi_si: Found default %s"
+ " state machine at %s address 0x%lx\n",
+ si_to_str[info->si_type],
+ addr_space_to_str[info->io.addr_type],
+ info->io.addr_data);
+ } else
+ cleanup_one_si(info);
}
}
}
@@ -2997,9 +3004,37 @@
return 1;
}
+static int add_smi(struct smi_info *new_smi)
+{
+ int rv = 0;
+
+ printk(KERN_INFO "ipmi_si: Adding %s-specified %s state machine",
+ ipmi_addr_src_to_str[new_smi->addr_source],
+ si_to_str[new_smi->si_type]);
+ mutex_lock(&smi_infos_lock);
+ if (!is_new_interface(new_smi)) {
+ printk(KERN_CONT ": duplicate interface\n");
+ rv = -EBUSY;
+ goto out_err;
+ }
+
+ printk(KERN_CONT "\n");
+
+ /* So we know not to free it unless we have allocated one. */
+ new_smi->intf = NULL;
+ new_smi->si_sm = NULL;
+ new_smi->handlers = NULL;
+
+ list_add_tail(&new_smi->link, &smi_infos);
+
+out_err:
+ mutex_unlock(&smi_infos_lock);
+ return rv;
+}
+
static int try_smi_init(struct smi_info *new_smi)
{
- int rv;
+ int rv = 0;
int i;
printk(KERN_INFO "ipmi_si: Trying %s-specified %s state"
@@ -3011,18 +3046,6 @@
new_smi->io.addr_data,
new_smi->slave_addr, new_smi->irq);
- mutex_lock(&smi_infos_lock);
- if (!is_new_interface(new_smi)) {
- printk(KERN_WARNING "ipmi_si: duplicate interface\n");
- rv = -EBUSY;
- goto out_err;
- }
-
- /* So we know not to free it unless we have allocated one. */
- new_smi->intf = NULL;
- new_smi->si_sm = NULL;
- new_smi->handlers = NULL;
-
switch (new_smi->si_type) {
case SI_KCS:
new_smi->handlers = &kcs_smi_handlers;
@@ -3183,10 +3206,6 @@
goto out_err_stop_timer;
}
- list_add_tail(&new_smi->link, &smi_infos);
-
- mutex_unlock(&smi_infos_lock);
-
printk(KERN_INFO "IPMI %s interface initialized\n",
si_to_str[new_smi->si_type]);
@@ -3197,11 +3216,17 @@
wait_for_timer_and_thread(new_smi);
out_err:
- if (new_smi->intf)
- ipmi_unregister_smi(new_smi->intf);
+ new_smi->interrupt_disabled = 1;
- if (new_smi->irq_cleanup)
+ if (new_smi->intf) {
+ ipmi_unregister_smi(new_smi->intf);
+ new_smi->intf = NULL;
+ }
+
+ if (new_smi->irq_cleanup) {
new_smi->irq_cleanup(new_smi);
+ new_smi->irq_cleanup = NULL;
+ }
/*
* Wait until we know that we are out of any interrupt
@@ -3214,18 +3239,21 @@
if (new_smi->handlers)
new_smi->handlers->cleanup(new_smi->si_sm);
kfree(new_smi->si_sm);
+ new_smi->si_sm = NULL;
}
- if (new_smi->addr_source_cleanup)
+ if (new_smi->addr_source_cleanup) {
new_smi->addr_source_cleanup(new_smi);
- if (new_smi->io_cleanup)
+ new_smi->addr_source_cleanup = NULL;
+ }
+ if (new_smi->io_cleanup) {
new_smi->io_cleanup(new_smi);
+ new_smi->io_cleanup = NULL;
+ }
- if (new_smi->dev_registered)
+ if (new_smi->dev_registered) {
platform_device_unregister(new_smi->pdev);
-
- kfree(new_smi);
-
- mutex_unlock(&smi_infos_lock);
+ new_smi->dev_registered = 0;
+ }
return rv;
}
@@ -3235,6 +3263,7 @@
int i;
char *str;
int rv;
+ struct smi_info *e;
if (initialized)
return 0;
@@ -3292,15 +3321,21 @@
of_register_platform_driver(&ipmi_of_platform_driver);
#endif
+ mutex_lock(&smi_infos_lock);
+ list_for_each_entry(e, &smi_infos, link) {
+ if (!e->si_sm)
+ try_smi_init(e);
+ }
+ mutex_unlock(&smi_infos_lock);
+
if (si_trydefaults) {
mutex_lock(&smi_infos_lock);
if (list_empty(&smi_infos)) {
/* No BMC was found, try defaults. */
mutex_unlock(&smi_infos_lock);
default_find_bmc();
- } else {
+ } else
mutex_unlock(&smi_infos_lock);
- }
}
mutex_lock(&smi_infos_lock);
@@ -3326,7 +3361,7 @@
static void cleanup_one_si(struct smi_info *to_clean)
{
- int rv;
+ int rv = 0;
unsigned long flags;
if (!to_clean)
@@ -3370,14 +3405,17 @@
schedule_timeout_uninterruptible(1);
}
- rv = ipmi_unregister_smi(to_clean->intf);
+ if (to_clean->intf)
+ rv = ipmi_unregister_smi(to_clean->intf);
+
if (rv) {
printk(KERN_ERR
"ipmi_si: Unable to unregister device: errno=%d\n",
rv);
}
- to_clean->handlers->cleanup(to_clean->si_sm);
+ if (to_clean->handlers)
+ to_clean->handlers->cleanup(to_clean->si_sm);
kfree(to_clean->si_sm);
