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path: root/drivers/platform/x86/dell-laptop.c
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Diffstat (limited to 'drivers/platform/x86/dell-laptop.c')
-rw-r--r--drivers/platform/x86/dell-laptop.c78
1 files changed, 41 insertions, 37 deletions
diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index c608b1d33f4a..fed4111ac31a 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -559,19 +559,45 @@ static void dell_update_rfkill(struct work_struct *ignored)
}
static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
+static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
+ struct serio *port)
+{
+ static bool extended;
+
+ if (str & 0x20)
+ return false;
+
+ if (unlikely(data == 0xe0)) {
+ extended = true;
+ return false;
+ } else if (unlikely(extended)) {
+ switch (data) {
+ case 0x8:
+ schedule_delayed_work(&dell_rfkill_work,
+ round_jiffies_relative(HZ / 4));
+ break;
+ }
+ extended = false;
+ }
+
+ return false;
+}
static int __init dell_setup_rfkill(void)
{
- int status;
- int ret;
+ int status, ret, whitelisted;
const char *product;
/*
- * rfkill causes trouble on various non Latitudes, according to Dell
- * actually testing the rfkill functionality is only done on Latitudes.
+ * rfkill support causes trouble on various models, mostly Inspirons.
+ * So we whitelist certain series, and don't support rfkill on others.
*/
+ whitelisted = 0;
product = dmi_get_system_info(DMI_PRODUCT_NAME);
- if (!force_rfkill && (!product || strncmp(product, "Latitude", 8)))
+ if (product && (strncmp(product, "Latitude", 8) == 0 ||
+ strncmp(product, "Precision", 9) == 0))
+ whitelisted = 1;
+ if (!force_rfkill && !whitelisted)
return 0;
get_buffer();
@@ -633,7 +659,16 @@ static int __init dell_setup_rfkill(void)
goto err_wwan;
}
+ ret = i8042_install_filter(dell_laptop_i8042_filter);
+ if (ret) {
+ pr_warn("Unable to install key filter\n");
+ goto err_filter;
+ }
+
return 0;
+err_filter:
+ if (wwan_rfkill)
+ rfkill_unregister(wwan_rfkill);
err_wwan:
rfkill_destroy(wwan_rfkill);
if (bluetooth_rfkill)
@@ -684,7 +719,7 @@ static int dell_send_intensity(struct backlight_device *bd)
out:
release_buffer();
- return 0;
+ return ret;
}
static int dell_get_intensity(struct backlight_device *bd)
@@ -755,30 +790,6 @@ static void touchpad_led_exit(void)
led_classdev_unregister(&touchpad_led);
}
-static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
- struct serio *port)
-{
- static bool extended;
-
- if (str & 0x20)
- return false;
-
- if (unlikely(data == 0xe0)) {
- extended = true;
- return false;
- } else if (unlikely(extended)) {
- switch (data) {
- case 0x8:
- schedule_delayed_work(&dell_rfkill_work,
- round_jiffies_relative(HZ / 4));
- break;
- }
- extended = false;
- }
-
- return false;
-}
-
static int __init dell_init(void)
{
int max_intensity = 0;
@@ -828,12 +839,6 @@ static int __init dell_init(void)
goto fail_rfkill;
}
- ret = i8042_install_filter(dell_laptop_i8042_filter);
- if (ret) {
- pr_warn("Unable to install key filter\n");
- goto fail_filter;
- }
-
if (quirks && quirks->touchpad_led)
touchpad_led_init(&platform_device->dev);
@@ -885,7 +890,6 @@ static int __init dell_init(void)
fail_backlight:
i8042_remove_filter(dell_laptop_i8042_filter);
cancel_delayed_work_sync(&dell_rfkill_work);
-fail_filter:
dell_cleanup_rfkill();
fail_rfkill:
free_page((unsigned long)bufferpage);