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HID: rmi: fallback to generic/multitouch if hid-rmi is not built

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Commit 279967a65b ("HID: rmi: Handle all Synaptics touchpads using hid-rmi")
unconditionally switches over handling of all Synaptics touchpads to hid-rmi
(to make use of extended features of the HW); in case CONFIG_HID_RMI is
disabled though this renders the touchpad unusable, as the

	HID_DEVICE(HID_BUS_ANY, HID_GROUP_RMI, HID_ANY_ID, HID_ANY_ID)

match doesn't exist and generic/multitouch doesn't bind to it either (due
to hid group mismatch).

Fix this by switching over to hid-rmi only if it has been actually built.

Fixes: 279967a65b ("HID: rmi: Handle all Synaptics touchpads using hid-rmi")
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Tested-by: Andrew Duggan <aduggan@synaptics.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Jiri Kosina 2017-02-22 01:13:52 +01:00
parent 27a67e0f98
commit 2fa299a917
1 changed files with 2 additions and 1 deletions
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3
drivers/hid/hid-core.c
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@ -827,7 +827,8 @@ static int hid_scan_report(struct hid_device *hid)
* hid-rmi should take care of them,
* not hid-generic
*/
hid->group = HID_GROUP_RMI;
if (IS_ENABLED(CONFIG_HID_RMI))
hid->group = HID_GROUP_RMI;
break;
}