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authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>2010-02-25 21:29:00 -0300
committerHenrique de Moraes Holschuh <hmh@hmh.eng.br>2010-02-25 21:37:23 -0300
commit7f0cf712a74fcc3ad21f0bde95bd32c2f2cc3888 (patch)
tree27ff0f6a3fcb501cff825a967d9fb7592dc81d47 /drivers/platform
parentb589ea4c44170d3f7a845684e2d1b3b9571663af (diff)
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thinkpad-acpi: make driver events work in NVRAM poll mode
Thadeu Lima de Souza Cascardo reports this: Brightness notification does not work until the user writes to hotkey_mask attribute. That's because the polling thread will only run if hotkey_user_mask is set and someone is reading the input device or if hotkey_driver_mask is set. In this second case, this condition is not tested after the mask is changed, because the brightness and volume drivers are started after the hotkey drivers. Fix tpacpi_hotkey_driver_mask_set() to call hotkey_poll_setup(), so that the poller kthread will be started when needed. Reported-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com> Tested-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com> Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: stable@kernel.org
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/thinkpad_acpi.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 933bcc4..5f45083 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -2082,6 +2082,7 @@ static struct attribute_set *hotkey_dev_attributes;
static void tpacpi_driver_event(const unsigned int hkey_event);
static void hotkey_driver_event(const unsigned int scancode);
+static void hotkey_poll_setup(const bool may_warn);
/* HKEY.MHKG() return bits */
#define TP_HOTKEY_TABLET_MASK (1 << 3)
@@ -2264,6 +2265,8 @@ static int tpacpi_hotkey_driver_mask_set(const u32 mask)
rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) &
~hotkey_source_mask);
+ hotkey_poll_setup(true);
+
mutex_unlock(&hotkey_mutex);
return rc;
@@ -2548,7 +2551,7 @@ static void hotkey_poll_stop_sync(void)
}
/* call with hotkey_mutex held */
-static void hotkey_poll_setup(bool may_warn)
+static void hotkey_poll_setup(const bool may_warn)
{
const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask;
const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask;
@@ -2579,7 +2582,7 @@ static void hotkey_poll_setup(bool may_warn)
}
}
-static void hotkey_poll_setup_safe(bool may_warn)
+static void hotkey_poll_setup_safe(const bool may_warn)
{
mutex_lock(&hotkey_mutex);
hotkey_poll_setup(may_warn);
@@ -2597,7 +2600,11 @@ static void hotkey_poll_set_freq(unsigned int freq)
#else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
-static void hotkey_poll_setup_safe(bool __unused)
+static void hotkey_poll_setup(const bool __unused)
+{
+}
+
+static void hotkey_poll_setup_safe(const bool __unused)
{
}