3.10-stable review patch. If anyone has any objections, please let me know.
------------------ From: Hans de Goede <hdego...@redhat.com> commit fb4f8f568a9def02240ef9bf7aabd246dc63a081 upstream. The touchpad on the GIGABYTE U2442 not only stops communicating when we try to set bit 3 (enable real hardware resolution) of reg_10, but on some BIOS versions also when we set bit 1 (enable two finger mode auto correct). I've asked the original reporter of: https://bugzilla.kernel.org/show_bug.cgi?id=61151 To check that not setting bit 1 does not lead to any adverse effects on his model / BIOS revision, and it does not, so this commit fixes the touchpad not working on these versions by simply never setting bit 1 for laptop models with the no_hw_res quirk. Reported-and-tested-by: James Lademann <jwladem...@gmail.com> Tested-by: Philipp Wolfer <ph.wol...@gmail.com> Signed-off-by: Hans de Goede <hdego...@redhat.com> Signed-off-by: Dmitry Torokhov <dmitry.torok...@gmail.com> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- drivers/input/mouse/elantech.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/drivers/input/mouse/elantech.c +++ b/drivers/input/mouse/elantech.c @@ -819,7 +819,7 @@ static int elantech_set_absolute_mode(st if (etd->set_hw_resolution) etd->reg_10 = 0x0b; else - etd->reg_10 = 0x03; + etd->reg_10 = 0x01; if (elantech_write_reg(psmouse, 0x10, etd->reg_10)) rc = -1; @@ -1320,7 +1320,8 @@ static int elantech_reconnect(struct psm } /* - * Some hw_version 3 models go into error state when we try to set bit 3 of r10 + * Some hw_version 3 models go into error state when we try to set + * bit 3 and/or bit 1 of r10. */ static const struct dmi_system_id no_hw_res_dmi_table[] = { #if defined(CONFIG_DMI) && defined(CONFIG_X86) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
