[PATCH] Revert "Input: synaptics - enable SMBus for HP Elitebook 850 G1"

[PATCH] Revert "Input: synaptics - enable SMBus for HP Elitebook 850 G1"

[Vishal Tyagi]

This reverts commit f04f03d3e99bc8f89b6af5debf07ff67d961bc23.

Commit f04f03d3e99b ("Input: synaptics - enable SMBus for HP Elitebook 850 G1")
added PNP ID "SYN3003" to smbus_pnp_ids[] to enable SMBus/InterTouch mode.

However, on Haswell-generation HP EliteBooks sharing this touchpad controller
(including HP EliteBook 840 G1 and HP EliteBook 850 G1), the touchpad fails
to resume after ACPI S3 suspend:

  rmi4_smbus 0-002c: failed to get SMBus version number!
  rmi4_f01 rmi4-00.fn01: Resume failed with code -6.
  rmi4_physical: Failed to resume rmi4-00: -6

Following resume from suspend, the touchpad remains completely unresponsive
and dead until a full reboot or manual module reload (modprobe -r psmouse).

Falling back to standard PS/2 mode (via synaptics_intertouch=0) allows
multi-touch gestures (two-finger scrolling, tap-to-click) to function normally
while preserving 100% reliable S3 suspend/resume behavior.

Revert this commit to prevent this regression on affected hardware.

Fixes: f04f03d3e99bc8f89b6af5debf07ff67d961bc23 ("Input: synaptics - enable SMBus for HP Elitebook 850 G1")
Cc: stable@vger.kernel.org
Signed-off-by: Vishal Tyagi <vishalxtyagi.oss@gmail.com>
---
 drivers/input/mouse/synaptics.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index a8e2a14..0d1b54a 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -195,7 +195,6 @@ static const char * const smbus_pnp_ids[] = {
 	"LEN2058", /* E490 */
 	"LEN205b", /* T490 */
 	"LEN2068", /* T14 Gen 1 */
 	"SYN1221", /* TUXEDO InfinityBook Pro 14 v5 */
-	"SYN3003", /* HP EliteBook 850 G1 */
 	"SYN3015", /* HP EliteBook 840 G2 */
 	"SYN3052", /* HP EliteBook 840 G4 */
 	"SYN3221", /* HP 15-ay000 */
--