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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>
This commit is contained in:
Alexandre Peixoto Ferreira 2011-01-28 22:05:14 -08:00 committed by Dmitry Torokhov
parent baddf58963
commit c63fe0a41f
1 changed files with 11 additions and 2 deletions
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11
drivers/input/mouse/synaptics.c
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@ -755,12 +755,21 @@ static int synaptics_reconnect(struct psmouse *psmouse)
{ {
struct synaptics_data *priv = psmouse->private; struct synaptics_data *priv = psmouse->private;
struct synaptics_data old_priv = *priv; struct synaptics_data old_priv = *priv;
int retry = 0;
int error;
do {
psmouse_reset(psmouse); psmouse_reset(psmouse);
error = synaptics_detect(psmouse, 0);
} while (error && ++retry < 3);
if (synaptics_detect(psmouse, 0)) if (error)
return -1; return -1;
if (retry > 1)
printk(KERN_DEBUG "Synaptics reconnected after %d tries\n",
retry);
if (synaptics_query_hardware(psmouse)) { if (synaptics_query_hardware(psmouse)) {
printk(KERN_ERR "Unable to query Synaptics hardware.\n"); printk(KERN_ERR "Unable to query Synaptics hardware.\n");
return -1; return -1;