drivers: power: report battery voltage in AOSP compatible format

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / acpi_ipmi.c

diff --git a/drivers/acpi/acpi_ipmi.c b/drivers/acpi/acpi_ipmi.c
index f40acef80269fa9e6a38435b1c328a7c80552b34..a6977e12d5745ab5f2015e2f2879174bddd64bc0 100644 (file)
--- a/drivers/acpi/acpi_ipmi.c
+++ b/drivers/acpi/acpi_ipmi.c
@@ -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);