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authorAndy Whitcroft <apw@canonical.com>2009-02-28 23:51:01 +0300
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2009-03-01 01:01:32 +0300
commit4d368456808c977b8e9782dbe9542cf8ddedbab8 (patch)
treef9c45ec8df1ea2fa6f7158d44459f486641a568d /drivers/input
parent139ebe8dc80dd74cb2ac9f5603d18fbf5cff049f (diff)
downloadlinux-4d368456808c977b8e9782dbe9542cf8ddedbab8.tar.xz
Input: synaptics - ensure we reset the device on resume
When resuming from suspend newer Synaptics touchpads do not recover correctly. Analysis of the resume sequence as applied in Linux was compared to that of other operating systems. This indicated that the other OSs were resetting the mouse before attempting to detect it (for all Synaptics touchpads, old and new). Applying this same modification fixes these newer Synaptics touchpads and brings the driver into line with common OS reset behaviour. Signed-off-by: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/mouse/synaptics.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c
index 865fc69e9bc3..f3e4f7b0240d 100644
--- a/drivers/input/mouse/synaptics.c
+++ b/drivers/input/mouse/synaptics.c
@@ -182,11 +182,6 @@ static int synaptics_identify(struct psmouse *psmouse)
static int synaptics_query_hardware(struct psmouse *psmouse)
{
- int retries = 0;
-
- while ((retries++ < 3) && psmouse_reset(psmouse))
- /* empty */;
-
if (synaptics_identify(psmouse))
return -1;
if (synaptics_model_id(psmouse))
@@ -582,6 +577,8 @@ static int synaptics_reconnect(struct psmouse *psmouse)
struct synaptics_data *priv = psmouse->private;
struct synaptics_data old_priv = *priv;
+ psmouse_reset(psmouse);
+
if (synaptics_detect(psmouse, 0))
return -1;
@@ -640,6 +637,8 @@ int synaptics_init(struct psmouse *psmouse)
if (!priv)
return -1;
+ psmouse_reset(psmouse);
+
if (synaptics_query_hardware(psmouse)) {
printk(KERN_ERR "Unable to query Synaptics hardware.\n");
goto init_fail;