[PATCH] platform/x86: msi-wmi: Fix hotkeys dropped with vendor backlight

[Patryk Pilichowski <pat.pilichowski@gmail.com>]

Commit dee82409a883 ("platform/x86: msi-wmi: Reformat
msi_wmi_notify()") turned the condition for reporting a hotkey into
an early return, but only negated the brightness key comparisons,
not the backlight check. As a result, when the driver registers its
own backlight device, all WMI hotkeys are now dropped, instead of all
of them being reported as before.

Restore the original behavior: only drop the brightness keys, and
only when brightness is handled by the ACPI video driver.

This was found by code inspection. It is not tested on hardware that
uses the vendor backlight; on an MSI Katana 15 B13VFK (no vendor
backlight) hotkey handling is unchanged.

Fixes: dee82409a883 ("platform/x86: msi-wmi: Reformat msi_wmi_notify()")
Signed-off-by: Patryk Pilichowski <pat.pilichowski@gmail.com>
---
 drivers/platform/x86/msi-wmi.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/msi-wmi.c b/drivers/platform/x86/msi-wmi.c
index c9db750fe5..05c35133a1 100644
--- a/drivers/platform/x86/msi-wmi.c
+++ b/drivers/platform/x86/msi-wmi.c
@@ -236,9 +236,9 @@ static void msi_wmi_notify(union acpi_object *obj, void *context)
 	}
 
 	/* Brightness is served via acpi video driver */
-	if (key->type == KE_KEY &&
-	    (backlight || (key->code == MSI_KEY_BRIGHTNESSUP ||
-			   key->code == MSI_KEY_BRIGHTNESSDOWN)))
+	if (key->type == KE_KEY && !backlight &&
+	    (key->code == MSI_KEY_BRIGHTNESSUP ||
+	     key->code == MSI_KEY_BRIGHTNESSDOWN))
 		return;
 
 	pr_debug("Send key: 0x%X - Input layer keycode: %d\n", key->code, key->keycode);
-- 
2.55.0