1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 40cea334ad13..705589dc9ac5 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -141,8 +141,13 @@ static int synaptics_capability(struct psmouse *psmouse)
         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
         priv->ext_cap = priv->ext_cap_0c = 0;
 
-        if (!SYN_CAP_VALID(priv->capabilities))
+        /*
+         * Older firmwares had submodel ID fixed to 0x47
+         */
+        if (SYN_ID_FULL(priv->identity) < 0x705 &&
+            SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
                 return -1;
+        }
 
         /*
          * Unless capExtended is set the rest of the flags should be ignored
@@ -206,6 +211,7 @@ static int synaptics_resolution(struct psmouse *psmouse)
         unsigned char max[3];
 
         if (SYN_ID_MAJOR(priv->identity) < 4)
+                return 0;
 
         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, res) == 0) {
                 if (res[0] != 0 && (res[1] & 0x80) && res[2] != 0) {