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Date: Mon, 03 May 2010 08:34:07 -0500
From: Corey Minyard <minyard@....org>
To: Linux Kernel <linux-kernel@...r.kernel.org>,
Andrew Morton <akpm@...l.org>
Cc: OpenIPMI Developers <openipmi-developer@...ts.sourceforge.net>,
Matthew Garrett <mjg@...hat.com>
Subject: [PATCH 2/8] ipmi: Split device discovery and registration
From: Matthew Garrett <mjg@...hat.com>
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.
Signed-off-by: Matthew Garrett <mjg@...hat.com>
Signed-off-by: Corey Minyard <cminyard@...sta.com>
---
Index: linux-2.6/drivers/char/ipmi/ipmi_si_intf.c
===================================================================
--- linux-2.6.orig/drivers/char/ipmi/ipmi_si_intf.c
+++ linux-2.6/drivers/char/ipmi/ipmi_si_intf.c
@@ -308,6 +308,7 @@ static int num_max_busy_us;
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 @@ static int hotmod_handler(const char *va
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 @@ static __devinit void hardcode_find_bmc(
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 @@ static __devinit int try_init_spmi(struc
}
info->io.addr_data = spmi->addr.address;
- try_smi_init(info);
+ add_smi(info);
return 0;
}
@@ -2167,7 +2172,7 @@ static int __devinit ipmi_pnp_probe(stru
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 @@ static __devinit void try_init_dmi(struc
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 @@ static int __devinit ipmi_pci_probe(stru
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 @@ static int __devinit ipmi_of_probe(struc
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)
@@ -2968,14 +2973,16 @@ static __devinit void default_find_bmc(v
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);
}
}
}
@@ -2994,32 +3001,48 @@ static int is_new_interface(struct smi_i
return 1;
}
-static int try_smi_init(struct smi_info *new_smi)
+static int add_smi(struct smi_info *new_smi)
{
- int rv;
- int i;
-
- printk(KERN_INFO "ipmi_si: Trying %s-specified %s state"
- " machine at %s address 0x%lx, slave address 0x%x,"
- " irq %d\n",
- ipmi_addr_src_to_str[new_smi->addr_source],
- si_to_str[new_smi->si_type],
- addr_space_to_str[new_smi->io.addr_type],
- new_smi->io.addr_data,
- new_smi->slave_addr, new_smi->irq);
+ 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_WARNING "ipmi_si: duplicate interface\n");
+ 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 = 0;
+ int i;
+
+ printk(KERN_INFO "ipmi_si: Trying %s-specified %s state"
+ " machine at %s address 0x%lx, slave address 0x%x,"
+ " irq %d\n",
+ ipmi_addr_src_to_str[new_smi->addr_source],
+ si_to_str[new_smi->si_type],
+ addr_space_to_str[new_smi->io.addr_type],
+ new_smi->io.addr_data,
+ new_smi->slave_addr, new_smi->irq);
+
switch (new_smi->si_type) {
case SI_KCS:
new_smi->handlers = &kcs_smi_handlers;
@@ -3180,8 +3203,6 @@ static int try_smi_init(struct smi_info
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",
@@ -3194,11 +3215,17 @@ static int try_smi_init(struct smi_info
wait_for_timer_and_thread(new_smi);
out_err:
- if (new_smi->intf)
+ new_smi->interrupt_disabled = 1;
+
+ if (new_smi->intf) {
ipmi_unregister_smi(new_smi->intf);
+ new_smi->intf = NULL;
+ }
- if (new_smi->irq_cleanup)
+ 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
@@ -3211,16 +3238,21 @@ static int try_smi_init(struct smi_info
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);
+ new_smi->dev_registered = 0;
+ }
mutex_unlock(&smi_infos_lock);
@@ -3232,6 +3264,7 @@ static __devinit int init_ipmi_si(void)
int i;
char *str;
int rv;
+ struct smi_info *e;
if (initialized)
return 0;
@@ -3289,15 +3322,21 @@ static __devinit int init_ipmi_si(void)
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);
@@ -3323,7 +3362,7 @@ module_init(init_ipmi_si);
static void cleanup_one_si(struct smi_info *to_clean)
{
- int rv;
+ int rv = 0;
unsigned long flags;
if (!to_clean)
@@ -3367,14 +3406,17 @@ static void cleanup_one_si(struct smi_in
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);
--
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