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Commit d93faa48 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

Merge branch 'acpi-fixes' 

* acpi-fixes:
  ACPI / scan: fix typo in comments of acpi_bus_unregister_driver()
  ACPI / IPMI: Fix atomic context requirement of ipmi_msg_handler()
parents 4a10c2ac b27b14ce

drivers/acpi/acpi_ipmi.c

+14 −10
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ 
#include <linux/ipmi.h>

#include <linux/device.h>

#include <linux/pnp.h>

#include <linux/spinlock.h>



MODULE_AUTHOR("Zhao Yakui");

MODULE_DESCRIPTION("ACPI IPMI Opregion driver");
@@ -57,7 +58,7 @@ struct acpi_ipmi_device { 
	struct list_head head;

	/* the IPMI request message list */

	struct list_head tx_msg_list;

	struct mutex	tx_msg_lock;

	spinlock_t	tx_msg_lock;

	acpi_handle handle;

	struct pnp_dev *pnp_dev;

	ipmi_user_t	user_interface;
@@ -147,6 +148,7 @@ static void acpi_format_ipmi_msg(struct acpi_ipmi_msg *tx_msg, 
	struct kernel_ipmi_msg *msg;

	struct acpi_ipmi_buffer *buffer;

	struct acpi_ipmi_device *device;

	unsigned long flags;



	msg = &tx_msg->tx_message;

	/*
@@ -177,10 +179,10 @@ static void acpi_format_ipmi_msg(struct acpi_ipmi_msg *tx_msg, 


	/* Get the msgid */

	device = tx_msg->device;

	mutex_lock(&device->tx_msg_lock);

	spin_lock_irqsave(&device->tx_msg_lock, flags);

	device->curr_msgid++;

	tx_msg->tx_msgid = device->curr_msgid;

	mutex_unlock(&device->tx_msg_lock);

	spin_unlock_irqrestore(&device->tx_msg_lock, flags);

}



static void acpi_format_ipmi_response(struct acpi_ipmi_msg *msg,
@@ -242,6 +244,7 @@ static void ipmi_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data) 
	int msg_found = 0;

	struct acpi_ipmi_msg *tx_msg;

	struct pnp_dev *pnp_dev = ipmi_device->pnp_dev;

	unsigned long flags;



	if (msg->user != ipmi_device->user_interface) {

		dev_warn(&pnp_dev->dev, "Unexpected response is returned. "
@@ -250,7 +253,7 @@ static void ipmi_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data) 
		ipmi_free_recv_msg(msg);

		return;

	}

	mutex_lock(&ipmi_device->tx_msg_lock);

	spin_lock_irqsave(&ipmi_device->tx_msg_lock, flags);

	list_for_each_entry(tx_msg, &ipmi_device->tx_msg_list, head) {

		if (msg->msgid == tx_msg->tx_msgid) {

			msg_found = 1;
@@ -258,7 +261,7 @@ static void ipmi_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data) 
		}

	}



	mutex_unlock(&ipmi_device->tx_msg_lock);

	spin_unlock_irqrestore(&ipmi_device->tx_msg_lock, flags);

	if (!msg_found) {

		dev_warn(&pnp_dev->dev, "Unexpected response (msg id %ld) is "

			"returned.\n", msg->msgid);
@@ -378,6 +381,7 @@ acpi_ipmi_space_handler(u32 function, acpi_physical_address address, 
	struct acpi_ipmi_device *ipmi_device = handler_context;

	int err, rem_time;

	acpi_status status;

	unsigned long flags;

	/*

	 * IPMI opregion message.

	 * IPMI message is firstly written to the BMC and system software
@@ -395,9 +399,9 @@ acpi_ipmi_space_handler(u32 function, acpi_physical_address address, 
		return AE_NO_MEMORY;



	acpi_format_ipmi_msg(tx_msg, address, value);

	mutex_lock(&ipmi_device->tx_msg_lock);

	spin_lock_irqsave(&ipmi_device->tx_msg_lock, flags);

	list_add_tail(&tx_msg->head, &ipmi_device->tx_msg_list);

	mutex_unlock(&ipmi_device->tx_msg_lock);

	spin_unlock_irqrestore(&ipmi_device->tx_msg_lock, flags);

	err = ipmi_request_settime(ipmi_device->user_interface,

					&tx_msg->addr,

					tx_msg->tx_msgid,
@@ -413,9 +417,9 @@ acpi_ipmi_space_handler(u32 function, acpi_physical_address address, 
	status = AE_OK;



end_label:

	mutex_lock(&ipmi_device->tx_msg_lock);

	spin_lock_irqsave(&ipmi_device->tx_msg_lock, flags);

	list_del(&tx_msg->head);

	mutex_unlock(&ipmi_device->tx_msg_lock);

	spin_unlock_irqrestore(&ipmi_device->tx_msg_lock, flags);

	kfree(tx_msg);

	return status;

}
@@ -457,7 +461,7 @@ static void acpi_add_ipmi_device(struct acpi_ipmi_device *ipmi_device) 


	INIT_LIST_HEAD(&ipmi_device->head);



	mutex_init(&ipmi_device->tx_msg_lock);

	spin_lock_init(&ipmi_device->tx_msg_lock);

	INIT_LIST_HEAD(&ipmi_device->tx_msg_list);

	ipmi_install_space_handler(ipmi_device);

drivers/acpi/scan.c

+1 −1
Original line number Diff line number Diff line
@@ -1121,7 +1121,7 @@ int acpi_bus_register_driver(struct acpi_driver *driver) 
EXPORT_SYMBOL(acpi_bus_register_driver);



/**

 * acpi_bus_unregister_driver - unregisters a driver with the APIC bus

 * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus

 * @driver: driver to unregister

 *

 * Unregisters a driver with the ACPI bus.  Searches the namespace for all