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| author | Daniel Drake <dsd@laptop.org> | 2010-01-07 01:52:39 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2010-01-07 01:53:30 -0800 |
| commit | e4e6efd2df4b5754bd519b516207eb723d1f17df (patch) | |
| tree | 26bef82f6bafcbd824cac6cd5896241cb2527e66 /drivers/input | |
| parent | 6f2701b79f2ee0c5eb946e8a87993acbe8041da3 (diff) | |
| download | linux-e4e6efd2df4b5754bd519b516207eb723d1f17df.tar.gz linux-e4e6efd2df4b5754bd519b516207eb723d1f17df.tar.bz2 linux-e4e6efd2df4b5754bd519b516207eb723d1f17df.zip | |
Input: psmouse - fix Synaptics detection when protocol is disabled
For configurations where Synaptics hardware is present but the Synaptics
extensions support is not compiled in, the mouse is reprobed and a new
device is allocated on every suspend/resume.
During probe, psmouse_switch_protocol() calls psmouse_extensions() with
set_properties=1. This calls the dummy synaptics_init() which returns an
error code, instructing us not to use the synaptics extensions.
During resume, psmouse_reconnect() calls psmouse_extensions() with
set_properties=0, in which case call to synaptics_init() is bypassed and
PSMOUSE_SYNAPTICS is returned. Since the result is different from previous
attempt psmouse_reconnect() fails and full re-probe happens.
Fix this by tweaking the set_properties=0 codepath in psmouse_extensions()
to be more careful about offering PSMOUSE_SYNAPTICS extensions.
Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/mouse/psmouse-base.c | 9 | ||||
| -rw-r--r-- | drivers/input/mouse/synaptics.c | 10 | ||||
| -rw-r--r-- | drivers/input/mouse/synaptics.h | 1 |
3 files changed, 19 insertions, 1 deletions
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c index d59e18b24ede..cabf4e1caacc 100644 --- a/drivers/input/mouse/psmouse-base.c +++ b/drivers/input/mouse/psmouse-base.c @@ -627,8 +627,15 @@ static int psmouse_extensions(struct psmouse *psmouse, synaptics_hardware = true; if (max_proto > PSMOUSE_IMEX) { - if (!set_properties || synaptics_init(psmouse) == 0) +/* + * Try activating protocol, but check if support is enabled first, since + * we try detecting Synaptics even when protocol is disabled. + */ + if (synaptics_supported() && + (!set_properties || synaptics_init(psmouse) == 0)) { return PSMOUSE_SYNAPTICS; + } + /* * Some Synaptics touchpads can emulate extended protocols (like IMPS/2). * Unfortunately Logitech/Genius probes confuse some firmware versions so diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index 05689e732191..d3f5243fa093 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -743,6 +743,11 @@ int synaptics_init(struct psmouse *psmouse) return -1; } +bool synaptics_supported(void) +{ + return true; +} + #else /* CONFIG_MOUSE_PS2_SYNAPTICS */ void __init synaptics_module_init(void) @@ -754,5 +759,10 @@ int synaptics_init(struct psmouse *psmouse) return -ENOSYS; } +bool synaptics_supported(void) +{ + return false; +} + #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */ diff --git a/drivers/input/mouse/synaptics.h b/drivers/input/mouse/synaptics.h index 838e7f2c9b30..f0f40a331dc8 100644 --- a/drivers/input/mouse/synaptics.h +++ b/drivers/input/mouse/synaptics.h @@ -109,5 +109,6 @@ void synaptics_module_init(void); int synaptics_detect(struct psmouse *psmouse, bool set_properties); int synaptics_init(struct psmouse *psmouse); void synaptics_reset(struct psmouse *psmouse); +bool synaptics_supported(void); #endif /* _SYNAPTICS_H */ |