diff options
| author | Lv Zheng <lv.zheng@intel.com> | 2017-09-26 16:54:03 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-30 08:39:01 +0000 |
| commit | 7003eb6399b1dcaee59d899800b4061381cde7d3 (patch) | |
| tree | fcda57f388c256296c9752fde43dfab247672214 /drivers/acpi/ec.c | |
| parent | 7160a4475260f7873192c27fb1a90f7564d4fb0b (diff) | |
ACPI / EC: Fix regression related to triggering source of EC event handling
commit 53c5eaabaea9a1b7a96f95ccc486d2ad721d95bb upstream.
Originally the Samsung quirks removed by commit 4c237371 can be covered
by commit e923e8e7 and ec_freeze_events=Y mode. But commit 9c40f956
changed ec_freeze_events=Y back to N, making this problem re-surface.
Actually, if commit e923e8e7 is robust enough, we can freely change
ec_freeze_events mode, so this patch fixes the issue by improving
commit e923e8e7.
Related commits listed in the merged order:
Commit: e923e8e79e18fd6be9162f1be6b99a002e9df2cb
Subject: ACPI / EC: Fix an issue that SCI_EVT cannot be detected
after event is enabled
Commit: 4c237371f290d1ed3b2071dd43554362137b1cce
Subject: ACPI / EC: Remove old CLEAR_ON_RESUME quirk
Commit: 9c40f956ce9b331493347d1b3cb7e384f7dc0581
Subject: Revert "ACPI / EC: Enable event freeze mode..." to fix
a regression
This patch not only fixes the reported post-resume EC event triggering
source issue, but also fixes an unreported similar issue related to the
driver bind by adding EC event triggering source in ec_install_handlers().
Fixes: e923e8e79e18 (ACPI / EC: Fix an issue that SCI_EVT cannot be detected after event is enabled)
Fixes: 4c237371f290 (ACPI / EC: Remove old CLEAR_ON_RESUME quirk)
Fixes: 9c40f956ce9b (Revert "ACPI / EC: Enable event freeze mode..." to fix a regression)
Link: https://bugzilla.kernel.org/show_bug.cgi?id=196833
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Reported-by: Alistair Hamilton <ahpatent@gmail.com>
Tested-by: Alistair Hamilton <ahpatent@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/acpi/ec.c')
| -rw-r--r-- | drivers/acpi/ec.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 51874695a730..c3bcb7f5986e 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -482,8 +482,11 @@ static inline void __acpi_ec_enable_event(struct acpi_ec *ec) { if (!test_and_set_bit(EC_FLAGS_QUERY_ENABLED, &ec->flags)) ec_log_drv("event unblocked"); - if (!test_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) - advance_transaction(ec); + /* + * Unconditionally invoke this once after enabling the event + * handling mechanism to detect the pending events. + */ + advance_transaction(ec); } static inline void __acpi_ec_disable_event(struct acpi_ec *ec) @@ -1458,11 +1461,10 @@ static int ec_install_handlers(struct acpi_ec *ec, bool handle_events) if (test_bit(EC_FLAGS_STARTED, &ec->flags) && ec->reference_count >= 1) acpi_ec_enable_gpe(ec, true); - - /* EC is fully operational, allow queries */ - acpi_ec_enable_event(ec); } } + /* EC is fully operational, allow queries */ + acpi_ec_enable_event(ec); return 0; } |