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Input: synaptics - retry failed resets when reconnecting
On some machines, like Dell Studio XPS 16 (1640), touchpad fails to respond to the standard query after first reset but may start responding later, so let's repeat reset sequence several (3) times. Signed-off-by: Alexandre Peixoto Ferreira <alexandref75@gmail.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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1 changed files with 11 additions and 2 deletions
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@ -755,12 +755,21 @@ static int synaptics_reconnect(struct psmouse *psmouse)
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{
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struct synaptics_data *priv = psmouse->private;
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struct synaptics_data old_priv = *priv;
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int retry = 0;
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int error;
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psmouse_reset(psmouse);
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do {
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psmouse_reset(psmouse);
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error = synaptics_detect(psmouse, 0);
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} while (error && ++retry < 3);
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if (synaptics_detect(psmouse, 0))
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if (error)
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return -1;
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if (retry > 1)
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printk(KERN_DEBUG "Synaptics reconnected after %d tries\n",
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retry);
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if (synaptics_query_hardware(psmouse)) {
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printk(KERN_ERR "Unable to query Synaptics hardware.\n");
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return -1;
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