classmate-laptop: always call input_sync() after input_report_switch()

Due to commit cdda911c34006f1089f3c87b1a1f31ab3a4722f2 evdev only
becomes readable when the buffer contains an EV_SYN/SYN_REPORT event.

So in order to read the tablet sensor data as it happens we need to
ensure that we always call input_sync() after input_report_switch()

Signed-off-by: Carlos Alberto Lopez Perez <clopez@igalia.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

diff --git a/drivers/platform/x86/classmate-laptop.c b/drivers/platform/x86/classmate-laptop.c
index cd33add118cea686242d5a63d6158b2e7f3af7e1..c87ff16873f9753ef589111763d743bc09ed1409 100644 (file)
--- a/drivers/platform/x86/classmate-laptop.c
+++ b/drivers/platform/x86/classmate-laptop.c
@@ -725,8 +725,10 @@ static void cmpc_tablet_handler(struct acpi_device *dev, u32 event)
        struct input_dev *inputdev = dev_get_drvdata(&dev->dev);
 
        if (event == 0x81) {
-               if (ACPI_SUCCESS(cmpc_get_tablet(dev->handle, &val)))
+               if (ACPI_SUCCESS(cmpc_get_tablet(dev->handle, &val))) {
                        input_report_switch(inputdev, SW_TABLET_MODE, !val);
+                       input_sync(inputdev);
+               }
        }
 }
 
@@ -739,8 +741,10 @@ static void cmpc_tablet_idev_init(struct input_dev *inputdev)
        set_bit(SW_TABLET_MODE, inputdev->swbit);
 
        acpi = to_acpi_device(inputdev->dev.parent);
-       if (ACPI_SUCCESS(cmpc_get_tablet(acpi->handle, &val)))
+       if (ACPI_SUCCESS(cmpc_get_tablet(acpi->handle, &val))) {
                input_report_switch(inputdev, SW_TABLET_MODE, !val);
+               input_sync(inputdev);
+       }
 }
 
 static int cmpc_tablet_add(struct acpi_device *acpi)
@@ -760,8 +764,10 @@ static int cmpc_tablet_resume(struct device *dev)
        struct input_dev *inputdev = dev_get_drvdata(dev);
 
        unsigned long long val = 0;
-       if (ACPI_SUCCESS(cmpc_get_tablet(to_acpi_device(dev)->handle, &val)))
+       if (ACPI_SUCCESS(cmpc_get_tablet(to_acpi_device(dev)->handle, &val))) {
                input_report_switch(inputdev, SW_TABLET_MODE, !val);
+               input_sync(inputdev);
+       }
        return 0;
 }
 #endif