From: Jiri Kosina <jikos@kernel.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Andrew Duggan <aduggan@synaptics.com>,
Benjamin Tissoires <benjamin.tissoires@redhat.com>,
linux-input@vger.kernel.org
Subject: [PATCH] HID: rmi: fallback to generic/multitouch if hid-rmi is not built (was Re: [GIT PULL] HID for 4.11)
Date: Tue, 21 Feb 2017 15:17:45 +0100 (CET) [thread overview]
Message-ID: <alpine.LSU.2.20.1702211514540.24579@cbobk.fhfr.pm> (raw)
In-Reply-To: <CA+55aFzfUbcB44UYwbKv-qci-wxCsWKEZs4Mso-J5cCoz9x0qQ@mail.gmail.com>
On Mon, 20 Feb 2017, Linus Torvalds wrote:
> > I'll have a more specific commit (or range) soon.
>
> Hmm. It's commit 279967a65b32 ("HID: rmi: Handle all Synaptics
> touchpads using hid-rmi").
>
> And the reason seems to be stupid: I don't have RMI enabled at all,
> because that didn't use to work or make a difference.
>
> Maybe that "let's use RMI" code should depend on RMI actually being
> enabled? Because as-is, that code now breaks existing configurations.
I agree; that's in line with what we usually try to stick to (force
specific drivers if the device doesn't work with the generic at all and
switch over to generic in compile-time for devices that have limited
functionality with the generic driver).
Andrew, Benjamin, how about the patch below?
From: Jiri Kosina <jkosina@suse.cz>
Subject: [PATCH] HID: rmi: fallback to generic/multitouch if hid-rmi is not built
Commit 279967a65b32 ("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: 279967a65b32 ("HID: rmi: Handle all Synaptics touchpads using hid-rmi")
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
drivers/hid/hid-core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 538ff697a4cf..e9e87d337446 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -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;
}
--
Jiri Kosina
SUSE Labs
next prev parent reply other threads:[~2017-02-21 14:17 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-20 15:20 [GIT PULL] HID for 4.11 Jiri Kosina
2017-02-21 2:48 ` Linus Torvalds
2017-02-21 3:03 ` Linus Torvalds
2017-02-21 3:19 ` Linus Torvalds
2017-02-21 4:13 ` Linus Torvalds
2017-02-21 4:37 ` Linus Torvalds
2017-03-01 0:56 ` Linus Torvalds
2017-03-01 2:31 ` Andrew Duggan
2017-03-01 3:24 ` Peter Hutterer
2017-03-01 5:05 ` Linus Torvalds
2017-03-01 7:43 ` Andrew Duggan
2017-03-01 9:03 ` Benjamin Tissoires
2017-03-01 9:06 ` Benjamin Tissoires
2017-03-01 17:31 ` Dmitry Torokhov
2017-03-01 17:54 ` Linus Torvalds
2017-03-01 17:58 ` Dmitry Torokhov
2017-03-01 18:02 ` Linus Torvalds
2017-02-21 14:17 ` Jiri Kosina [this message]
2017-02-21 15:43 ` [PATCH] HID: rmi: fallback to generic/multitouch if hid-rmi is not built (was Re: [GIT PULL] HID for 4.11) Linus Torvalds
2017-02-21 15:46 ` Jiri Kosina
2017-02-21 15:49 ` Linus Torvalds
2017-02-21 17:42 ` Benjamin Tissoires
2017-02-21 21:03 ` Jiri Kosina
2017-02-22 0:53 ` Jason Gerecke
2017-02-21 17:37 ` Benjamin Tissoires
2017-02-21 21:16 ` Andrew Duggan
2017-02-21 9:32 ` ath10k regression on XPS13 Kalle Valo
2017-02-21 18:18 ` David Miller
2017-02-21 18:38 ` Kalle Valo
2017-02-21 18:53 ` David Miller
2017-02-21 19:49 ` Kalle Valo
2017-02-21 21:00 ` David Miller
2017-02-21 18:52 ` Linus Torvalds
2017-02-21 21:01 ` David Miller
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