* Patch "Input: elan_i2c - check if device is there before really probing" has been added to the 4.4-stable tree
@ 2018-04-10 9:04 gregkh
0 siblings, 0 replies; only message in thread
From: gregkh @ 2018-04-10 9:04 UTC (permalink / raw)
To: dmitry.torokhov, alexander.levin, gregkh, linux; +Cc: stable, stable-commits
This is a note to let you know that I've just added the patch titled
Input: elan_i2c - check if device is there before really probing
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
input-elan_i2c-check-if-device-is-there-before-really-probing.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From foo@baz Tue Apr 10 10:31:53 CEST 2018
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: Fri, 19 Dec 2014 12:57:49 -0800
Subject: Input: elan_i2c - check if device is there before really probing
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
[ Upstream commit c5928551fd41b2eecdad78fa2be2a4a13ed5fde9 ]
Before trying to properly initialize the touchpad and generate bunch of
errors, let's first see it there is anything at the given address. If we
get error, fail silently with -ENXIO.
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/input/mouse/elan_i2c_core.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/input/mouse/elan_i2c_core.c
+++ b/drivers/input/mouse/elan_i2c_core.c
@@ -1082,6 +1082,13 @@ static int elan_probe(struct i2c_client
return error;
}
+ /* Make sure there is something at this address */
+ error = i2c_smbus_read_byte(client);
+ if (error < 0) {
+ dev_dbg(&client->dev, "nothing at this address: %d\n", error);
+ return -ENXIO;
+ }
+
/* Initialize the touchpad. */
error = elan_initialize(data);
if (error)
Patches currently in stable-queue which might be from dmitry.torokhov@gmail.com are
queue-4.4/input-elantech-force-relative-mode-on-a-certain-module.patch
queue-4.4/input-elan_i2c-check-if-device-is-there-before-really-probing.patch
queue-4.4/input-elan_i2c-clear-int-before-resetting-controller.patch
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2018-04-10 9:04 Patch "Input: elan_i2c - check if device is there before really probing" has been added to the 4.4-stable tree gregkh
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