diff options
| author |   Benjamin Tissoires <benjamin.tissoires@redhat.com> | 2018-05-22 17:28:23 -0700 |
|---|---|---|
| committer |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2018-05-23 16:49:22 -0700 |
| commit | 21c48dbde0944e3d52468008321900af3bdafcf1 (patch) | |
| tree | 076300cb80f45799824b1f550fe04bdf9a3c8983 /drivers/input/mouse/psmouse-smbus.c | |
| parent | Input: elantech - query the resolution in query_info (diff) | |
| download | linux-dev-21c48dbde0944e3d52468008321900af3bdafcf1.tar.xz linux-dev-21c48dbde0944e3d52468008321900af3bdafcf1.zip | |
Input: elantech - add support for SMBus devices
Many of the Elantech devices are connected through PS/2 and a different
bus (SMBus or plain I2C).
To not break any existing device, we only enable SMBus based
on a module parameter. If some laptops require the quirk to
be set, we will have to rely on a list of PNPIds or MDI matching
to individually expose those hardware over SMBus.
the parameter mentioned above is elantech_smbus from the psmouse
module.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: KT Liao <kt.liao@emc.com.tw>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/mouse/psmouse-smbus.c')
| -rw-r--r-- | drivers/input/mouse/psmouse-smbus.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/input/mouse/psmouse-smbus.c b/drivers/input/mouse/psmouse-smbus.c index c7ac24d119c1..c8a3b1f35ce3 100644 --- a/drivers/input/mouse/psmouse-smbus.c +++ b/drivers/input/mouse/psmouse-smbus.c @@ -237,10 +237,13 @@ int psmouse_smbus_init(struct psmouse *psmouse, smbdev->psmouse = psmouse; smbdev->board = *board; - smbdev->board.platform_data = kmemdup(pdata, pdata_size, GFP_KERNEL); - if (!smbdev->board.platform_data) { - kfree(smbdev); - return -ENOMEM; + if (pdata) { + smbdev->board.platform_data = kmemdup(pdata, pdata_size, + GFP_KERNEL); + if (!smbdev->board.platform_data) { + kfree(smbdev); + return -ENOMEM; + } } psmouse->private = smbdev; |