6 files changed, 176 insertions, 7 deletions

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index e631dbeafd79..7bec4588c268 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -385,6 +385,16 @@ config EEEPC_LAPTOP
 
           If you have an Eee PC laptop, say Y or M here.
 
+config EEEPC_WMI
+        tristate "Eee PC WMI Hotkey Driver (EXPERIMENTAL)"
+        depends on ACPI_WMI
+        depends on INPUT
+        depends on EXPERIMENTAL
+        ---help---
+          Say Y here if you want to support WMI-based hotkeys on Eee PC laptops.
+
+          To compile this driver as a module, choose M here: the module will
+          be called eeepc-wmi.
 
 config ACPI_WMI
         tristate "WMI"
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 9cd9fa0a27e6..a906490e3530 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -4,6 +4,7 @@
 #
 obj-$(CONFIG_ASUS_LAPTOP)       += asus-laptop.o
 obj-$(CONFIG_EEEPC_LAPTOP)      += eeepc-laptop.o
+obj-$(CONFIG_EEEPC_WMI)         += eeepc-wmi.o
 obj-$(CONFIG_MSI_LAPTOP)        += msi-laptop.o
 obj-$(CONFIG_ACPI_CMPC)         += classmate-laptop.o
 obj-$(CONFIG_COMPAL_LAPTOP)     += compal-laptop.o
diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c
index db5f7db2ba33..475ab50732ab 100644
--- a/drivers/platform/x86/asus-laptop.c
+++ b/drivers/platform/x86/asus-laptop.c
@@ -139,7 +139,7 @@ MODULE_PARM_DESC(bluetooth_status, "Set the wireless status on boot "
 
 /* Backlight */
 static acpi_handle lcd_switch_handle;
-static const char *lcd_switch_paths[] = {
+static char *lcd_switch_paths[] = {
   "\\_SB.PCI0.SBRG.EC0._Q10",   /* All new models */
   "\\_SB.PCI0.ISA.EC0._Q10",    /* A1x */
   "\\_SB.PCI0.PX40.ECD0._Q10",  /* L3C */
@@ -153,7 +153,7 @@ static const char *lcd_switch_paths[] = {
 #define METHOD_SWITCH_DISPLAY   "SDSP"
 
 static acpi_handle display_get_handle;
-static const char *display_get_paths[] = {
+static char *display_get_paths[] = {
   /* A6B, A6K A6R A7D F3JM L4R M6R A3G M6A M6V VX-1 V6J V6V W3Z */
   "\\_SB.PCI0.P0P1.VGA.GETD",
   /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V S5A M5A z33A W1Jc W2V G1 */
diff --git a/drivers/platform/x86/eeepc-wmi.c b/drivers/platform/x86/eeepc-wmi.c
new file mode 100644
index 000000000000..2466b7b7fb0e
--- /dev/null
+++ b/drivers/platform/x86/eeepc-wmi.c
@@ -0,0 +1,157 @@
+/*
+ * Eee PC WMI hotkey driver
+ *
+ * Copyright(C) 2010 Intel Corporation.
+ *
+ * Portions based on wistron_btns.c:
+ * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
+ * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
+ * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+
+MODULE_AUTHOR("Yong Wang <yong.y.wang@intel.com>");
+MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
+MODULE_LICENSE("GPL");
+
+#define EEEPC_WMI_EVENT_GUID    "ABBC0F72-8EA1-11D1-00A0-C90629100000"
+
+MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID);
+
+#define NOTIFY_BRNUP_MIN        0x11
+#define NOTIFY_BRNUP_MAX        0x1f
+#define NOTIFY_BRNDOWN_MIN      0x20
+#define NOTIFY_BRNDOWN_MAX      0x2e
+
+static const struct key_entry eeepc_wmi_keymap[] = {
+        /* Sleep already handled via generic ACPI code */
+        { KE_KEY, 0x5d, { KEY_WLAN } },
+        { KE_KEY, 0x32, { KEY_MUTE } },
+        { KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
+        { KE_KEY, 0x30, { KEY_VOLUMEUP } },
+        { KE_IGNORE, NOTIFY_BRNDOWN_MIN, { KEY_BRIGHTNESSDOWN } },
+        { KE_IGNORE, NOTIFY_BRNUP_MIN, { KEY_BRIGHTNESSUP } },
+        { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
+        { KE_END, 0},
+};
+
+static struct input_dev *eeepc_wmi_input_dev;
+
+static void eeepc_wmi_notify(u32 value, void *context)
+{
+        struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
+        union acpi_object *obj;
+        acpi_status status;
+        int code;
+
+        status = wmi_get_event_data(value, &response);
+        if (status != AE_OK) {
+                pr_err("EEEPC WMI: bad event status 0x%x\n", status);
+                return;
+        }
+
+        obj = (union acpi_object *)response.pointer;
+
+        if (obj && obj->type == ACPI_TYPE_INTEGER) {
+                code = obj->integer.value;
+
+                if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
+                        code = NOTIFY_BRNUP_MIN;
+                else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
+                        code = NOTIFY_BRNDOWN_MIN;
+
+                if (!sparse_keymap_report_event(eeepc_wmi_input_dev,
+                                                code, 1, true))
+                        pr_info("EEEPC WMI: Unknown key %x pressed\n", code);
+        }
+
+        kfree(obj);
+}
+
+static int eeepc_wmi_input_setup(void)
+{
+        int err;
+
+        eeepc_wmi_input_dev = input_allocate_device();
+        if (!eeepc_wmi_input_dev)
+                return -ENOMEM;
+
+        eeepc_wmi_input_dev->name = "Eee PC WMI hotkeys";
+        eeepc_wmi_input_dev->phys = "wmi/input0";
+        eeepc_wmi_input_dev->id.bustype = BUS_HOST;
+
+        err = sparse_keymap_setup(eeepc_wmi_input_dev, eeepc_wmi_keymap, NULL);
+        if (err)
+                goto err_free_dev;
+
+        err = input_register_device(eeepc_wmi_input_dev);
+        if (err)
+                goto err_free_keymap;
+
+        return 0;
+
+err_free_keymap:
+        sparse_keymap_free(eeepc_wmi_input_dev);
+err_free_dev:
+        input_free_device(eeepc_wmi_input_dev);
+        return err;
+}
+
+static int __init eeepc_wmi_init(void)
+{
+        int err;
+        acpi_status status;
+
+        if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID)) {
+                pr_warning("EEEPC WMI: No known WMI GUID found\n");
+                return -ENODEV;
+        }
+
+        err = eeepc_wmi_input_setup();
+        if (err)
+                return err;
+
+        status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
+                                        eeepc_wmi_notify, NULL);
+        if (ACPI_FAILURE(status)) {
+                sparse_keymap_free(eeepc_wmi_input_dev);
+                input_unregister_device(eeepc_wmi_input_dev);
+                pr_err("EEEPC WMI: Unable to register notify handler - %d\n",
+                        status);
+                return -ENODEV;
+        }
+
+        return 0;
+}
+
+static void __exit eeepc_wmi_exit(void)
+{
+        wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
+        sparse_keymap_free(eeepc_wmi_input_dev);
+        input_unregister_device(eeepc_wmi_input_dev);
+}
+
+module_init(eeepc_wmi_init);
+module_exit(eeepc_wmi_exit);
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index c1ef50154868..6fcc7e71fbaa 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -309,7 +309,7 @@ static int vfat_create_shortname(struct inode *dir, struct nls_table *nls,
 {
         struct fat_mount_options *opts = &MSDOS_SB(dir->i_sb)->options;
         wchar_t *ip, *ext_start, *end, *name_start;
-        unsigned char base[9], ext[4], buf[8], *p;
+        unsigned char base[9], ext[4], buf[5], *p;
         unsigned char charbuf[NLS_MAX_CHARSET_SIZE];
         int chl, chi;
         int sz = 0, extlen, baselen, i, numtail_baselen, numtail2_baselen;
@@ -467,7 +467,7 @@ static int vfat_create_shortname(struct inode *dir, struct nls_table *nls,
                         return 0;
         }
 
-        i = jiffies & 0xffff;
+        i = jiffies;
         sz = (jiffies >> 16) & 0x7;
         if (baselen > 2) {
                 baselen = numtail2_baselen;
@@ -476,7 +476,7 @@ static int vfat_create_shortname(struct inode *dir, struct nls_table *nls,
         name_res[baselen + 4] = '~';
         name_res[baselen + 5] = '1' + sz;
         while (1) {
-                sprintf(buf, "%04X", i);
+                snprintf(buf, sizeof(buf), "%04X", i & 0xffff);
                 memcpy(&name_res[baselen], buf, 4);
                 if (vfat_find_form(dir, name_res) < 0)
                         break;
diff --git a/fs/proc/base.c b/fs/proc/base.c
index a7310841c831..b1f6e62773d3 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -442,12 +442,13 @@ static const struct file_operations proc_lstats_operations = {
 unsigned long badness(struct task_struct *p, unsigned long uptime);
 static int proc_oom_score(struct task_struct *task, char *buffer)
 {
-        unsigned long points;
+        unsigned long points = 0;
         struct timespec uptime;
 
         do_posix_clock_monotonic_gettime(&uptime);
         read_lock(&tasklist_lock);
-        points = badness(task->group_leader, uptime.tv_sec);
+        if (pid_alive(task))
+                points = badness(task, uptime.tv_sec);
         read_unlock(&tasklist_lock);
         return sprintf(buffer, "%lu\n", points);
 }