[PATCH AUTOSEL 5.7 19/40] Input: elan_i2c - only increment wakeup count on touch

From: Sasha Levin
Date: Mon Jul 20 2020 - 17:45:08 EST


From: Derek Basehore <dbasehore@xxxxxxxxxxxx>

[ Upstream commit 966334dfc472bdfa67bed864842943b19755d192 ]

This moves the wakeup increment for elan devices to the touch report.
This prevents the drivers from incorrectly reporting a wakeup when the
resume callback resets then device, which causes an interrupt to
occur.

Signed-off-by: Derek Basehore <dbasehore@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20200706235046.1984283-1-dbasehore@xxxxxxxxxxxx
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/input/mouse/elan_i2c_core.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/input/mouse/elan_i2c_core.c b/drivers/input/mouse/elan_i2c_core.c
index 8719da5403834..196e8505dd8d7 100644
--- a/drivers/input/mouse/elan_i2c_core.c
+++ b/drivers/input/mouse/elan_i2c_core.c
@@ -951,6 +951,8 @@ static void elan_report_absolute(struct elan_tp_data *data, u8 *packet)
u8 hover_info = packet[ETP_HOVER_INFO_OFFSET];
bool contact_valid, hover_event;

+ pm_wakeup_event(&data->client->dev, 0);
+
hover_event = hover_info & 0x40;
for (i = 0; i < ETP_MAX_FINGERS; i++) {
contact_valid = tp_info & (1U << (3 + i));
@@ -974,6 +976,8 @@ static void elan_report_trackpoint(struct elan_tp_data *data, u8 *report)
u8 *packet = &report[ETP_REPORT_ID_OFFSET + 1];
int x, y;

+ pm_wakeup_event(&data->client->dev, 0);
+
if (!data->tp_input) {
dev_warn_once(&data->client->dev,
"received a trackpoint report while no trackpoint device has been created. Please report upstream.\n");
@@ -998,7 +1002,6 @@ static void elan_report_trackpoint(struct elan_tp_data *data, u8 *report)
static irqreturn_t elan_isr(int irq, void *dev_id)
{
struct elan_tp_data *data = dev_id;
- struct device *dev = &data->client->dev;
int error;
u8 report[ETP_MAX_REPORT_LEN];

@@ -1016,8 +1019,6 @@ static irqreturn_t elan_isr(int irq, void *dev_id)
if (error)
goto out;

- pm_wakeup_event(dev, 0);
-
switch (report[ETP_REPORT_ID_OFFSET]) {
case ETP_REPORT_ID:
elan_report_absolute(data, report);
@@ -1026,7 +1027,7 @@ static irqreturn_t elan_isr(int irq, void *dev_id)
elan_report_trackpoint(data, report);
break;
default:
- dev_err(dev, "invalid report id data (%x)\n",
+ dev_err(&data->client->dev, "invalid report id data (%x)\n",
report[ETP_REPORT_ID_OFFSET]);
}

--
2.25.1