Minor fixes for IPMI

Lots of small unconnected things, memory leaks on error, a possible
 (though unlikely) deadlock, changes for updates to other things
 that have changed.  Nothing earth-shattering, but things that need
 update.
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Merge tag 'for-linus-6.6-1' of https://github.com/cminyard/linux-ipmi

Pull IPMI updates from Corey Minyard:
 "Minor fixes for IPMI

  Lots of small unconnected things, memory leaks on error, a possible
  (though unlikely) deadlock, changes for updates to other things that
  have changed. Nothing earth-shattering, but things that need update"

* tag 'for-linus-6.6-1' of https://github.com/cminyard/linux-ipmi:
  ipmi_si: fix -Wvoid-pointer-to-enum-cast warning
  ipmi: fix potential deadlock on &kcs_bmc->lock
  ipmi_si: fix a memleak in try_smi_init()
  ipmi: Change request_module to request_module_nowait
  ipmi: make ipmi_class a static const structure
  ipmi:ssif: Fix a memory leak when scanning for an adapter
  ipmi:ssif: Add check for kstrdup
  dt-bindings: ipmi: aspeed,ast2400-kcs-bmc: drop unneeded quotes
  ipmi: Switch i2c drivers back to use .probe()
  ipmi_watchdog: Fix read syscall not responding to signals during sleep

drivers/char/ipmi/ipmb_dev_int.c

@@ -366,7 +366,7 @@ static struct i2c_driver ipmb_driver = {
 		.name = "ipmb-dev",
 		.acpi_match_table = ACPI_PTR(acpi_ipmb_id),
 	},
-	.probe_new = ipmb_probe,
+	.probe = ipmb_probe,
 	.remove = ipmb_remove,
 	.id_table = ipmb_id,
 };

drivers/char/ipmi/ipmi_devintf.c

@@ -807,7 +807,9 @@ struct ipmi_reg_list {
 static LIST_HEAD(reg_list);
 static DEFINE_MUTEX(reg_list_mutex);
 
-static struct class *ipmi_class;
+static const struct class ipmi_class = {
+	.name = "ipmi",
+};
 
 static void ipmi_new_smi(int if_num, struct device *device)
 {
@@ -822,7 +824,7 @@ static void ipmi_new_smi(int if_num, struct device *device)
 	entry->dev = dev;
 
 	mutex_lock(&reg_list_mutex);
-	device_create(ipmi_class, device, dev, NULL, "ipmi%d", if_num);
+	device_create(&ipmi_class, device, dev, NULL, "ipmi%d", if_num);
 	list_add(&entry->link, &reg_list);
 	mutex_unlock(&reg_list_mutex);
 }
@@ -840,7 +842,7 @@ static void ipmi_smi_gone(int if_num)
 			break;
 		}
 	}
-	device_destroy(ipmi_class, dev);
+	device_destroy(&ipmi_class, dev);
 	mutex_unlock(&reg_list_mutex);
 }
 
@@ -860,15 +862,13 @@ static int __init init_ipmi_devintf(void)
 
 	pr_info("ipmi device interface\n");
 
-	ipmi_class = class_create("ipmi");
+	rv = class_register(&ipmi_class);
-	if (IS_ERR(ipmi_class)) {
+	if (rv)
-		pr_err("ipmi: can't register device class\n");
+		return rv;
-		return PTR_ERR(ipmi_class);
-	}
 
 	rv = register_chrdev(ipmi_major, DEVICE_NAME, &ipmi_fops);
 	if (rv < 0) {
-		class_destroy(ipmi_class);
+		class_unregister(&ipmi_class);
 		pr_err("ipmi: can't get major %d\n", ipmi_major);
 		return rv;
 	}
@@ -880,7 +880,7 @@ static int __init init_ipmi_devintf(void)
 	rv = ipmi_smi_watcher_register(&smi_watcher);
 	if (rv) {
 		unregister_chrdev(ipmi_major, DEVICE_NAME);
-		class_destroy(ipmi_class);
+		class_unregister(&ipmi_class);
 		pr_warn("ipmi: can't register smi watcher\n");
 		return rv;
 	}
@@ -895,11 +895,11 @@ static void __exit cleanup_ipmi(void)
 	mutex_lock(&reg_list_mutex);
 	list_for_each_entry_safe(entry, entry2, &reg_list, link) {
 		list_del(&entry->link);
-		device_destroy(ipmi_class, entry->dev);
+		device_destroy(&ipmi_class, entry->dev);
 		kfree(entry);
 	}
 	mutex_unlock(&reg_list_mutex);
-	class_destroy(ipmi_class);
+	class_unregister(&ipmi_class);
 	ipmi_smi_watcher_unregister(&smi_watcher);
 	unregister_chrdev(ipmi_major, DEVICE_NAME);
 }

drivers/char/ipmi/ipmi_ipmb.c

@@ -572,7 +572,7 @@ static struct i2c_driver ipmi_ipmb_driver = {
 		.name = DEVICE_NAME,
 		.of_match_table = of_ipmi_ipmb_match,
 	},
-	.probe_new	= ipmi_ipmb_probe,
+	.probe		= ipmi_ipmb_probe,
 	.remove		= ipmi_ipmb_remove,
 	.id_table	= ipmi_ipmb_id,
 };

drivers/char/ipmi/ipmi_si_intf.c

@@ -2082,6 +2082,11 @@ static int try_smi_init(struct smi_info *new_smi)
 		new_smi->io.io_cleanup = NULL;
 	}
 
+	if (rv && new_smi->si_sm) {
+		kfree(new_smi->si_sm);
+		new_smi->si_sm = NULL;
+	}
+
 	return rv;
 }
 

drivers/char/ipmi/ipmi_si_platform.c

@@ -269,7 +269,7 @@ static int of_ipmi_probe(struct platform_device *pdev)
 	}
 
 	memset(&io, 0, sizeof(io));
-	io.si_type	= (enum si_type) match->data;
+	io.si_type	= (unsigned long) match->data;
 	io.addr_source	= SI_DEVICETREE;
 	io.irq_setup	= ipmi_std_irq_setup;
 
@@ -381,7 +381,7 @@ static int acpi_ipmi_probe(struct platform_device *pdev)
 	dev_info(dev, "%pR regsize %d spacing %d irq %d\n",
 		 res, io.regsize, io.regspacing, io.irq);
 
-	request_module("acpi_ipmi");
+	request_module_nowait("acpi_ipmi");
 
 	return ipmi_si_add_smi(&io);
 }

drivers/char/ipmi/ipmi_ssif.c

@@ -1400,7 +1400,7 @@ static struct ssif_addr_info *ssif_info_find(unsigned short addr,
 restart:
 	list_for_each_entry(info, &ssif_infos, link) {
 		if (info->binfo.addr == addr) {
-			if (info->addr_src == SI_SMBIOS)
+			if (info->addr_src == SI_SMBIOS && !info->adapter_name)
 				info->adapter_name = kstrdup(adapter_name,
 							     GFP_KERNEL);
 
@@ -1439,7 +1439,7 @@ static bool check_acpi(struct ssif_info *ssif_info, struct device *dev)
 	if (acpi_handle) {
 		ssif_info->addr_source = SI_ACPI;
 		ssif_info->addr_info.acpi_info.acpi_handle = acpi_handle;
-		request_module("acpi_ipmi");
+		request_module_nowait("acpi_ipmi");
 		return true;
 	}
 #endif
@@ -1600,6 +1600,11 @@ static int ssif_add_infos(struct i2c_client *client)
 	info->addr_src = SI_ACPI;
 	info->client = client;
 	info->adapter_name = kstrdup(client->adapter->name, GFP_KERNEL);
+	if (!info->adapter_name) {
+		kfree(info);
+		return -ENOMEM;
+	}
+
 	info->binfo.addr = client->addr;
 	list_add_tail(&info->link, &ssif_infos);
 	return 0;
@@ -2054,7 +2059,7 @@ static struct i2c_driver ssif_i2c_driver = {
 	.driver		= {
 		.name			= DEVICE_NAME
 	},
-	.probe_new	= ssif_probe,
+	.probe		= ssif_probe,
 	.remove		= ssif_remove,
 	.alert		= ssif_alert,
 	.id_table	= ssif_id,

drivers/char/ipmi/ipmi_watchdog.c

@@ -802,7 +802,7 @@ static ssize_t ipmi_read(struct file *file,
 
 		init_waitqueue_entry(&wait, current);
 		add_wait_queue(&read_q, &wait);
-		while (!data_to_read) {
+		while (!data_to_read && !signal_pending(current)) {
 			set_current_state(TASK_INTERRUPTIBLE);
 			spin_unlock_irq(&ipmi_read_lock);
 			schedule();

drivers/char/ipmi/kcs_bmc.c

@@ -56,12 +56,13 @@ irqreturn_t kcs_bmc_handle_event(struct kcs_bmc_device *kcs_bmc)
 {
 	struct kcs_bmc_client *client;
 	irqreturn_t rc = IRQ_NONE;
+	unsigned long flags;
 
-	spin_lock(&kcs_bmc->lock);
+	spin_lock_irqsave(&kcs_bmc->lock, flags);
 	client = kcs_bmc->client;
 	if (client)
 		rc = client->ops->event(client);
-	spin_unlock(&kcs_bmc->lock);
+	spin_unlock_irqrestore(&kcs_bmc->lock, flags);
 
 	return rc;
 }

drivers/char/ipmi/ssif_bmc.c

@@ -860,7 +860,7 @@ static struct i2c_driver ssif_bmc_driver = {
 		.name           = DEVICE_NAME,
 		.of_match_table = ssif_bmc_match,
 	},
-	.probe_new      = ssif_bmc_probe,
+	.probe          = ssif_bmc_probe,
 	.remove         = ssif_bmc_remove,
 	.id_table       = ssif_bmc_id,
 };