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17 May 2024, 09:02:56 UTC
Revision 9768935264c4f0e4afd788a185d8e8d89c28e41d authored by Andrew Duggan on 23 June 2017, 07:04:51 UTC, committed by Dmitry Torokhov on 23 June 2017, 07:08:48 UTC 
Input: synaptics-rmi4 - only read the F54 query registers which are used
 
The F54 driver is currently only using the first 6 bytes of F54 so there is
no need to read all 27 bytes. Some Dell systems (Dell XP13 9333 and
similar) have an issue with the touchpad or I2C bus when reading reports
larger then 16 bytes. Reads larger then 16 bytes are reported in two HID
reports. Something about the back to back reports seems to cause the next
read to report incorrect data. This results in F30 failing to load and the
click button failing to work.

Previous issues with the I2C controller or touchpad were addressed in:
commit 5b65c2a02966 ("HID: rmi: check sanity of the incoming report")

Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=195949
Signed-off-by: Andrew Duggan <aduggan@synaptics.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reviewed-by: Nick Dyer <nick@shmanahar.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
1 parent 817ae46
History
Tip revision: 9768935264c4f0e4afd788a185d8e8d89c28e41d authored by Andrew Duggan on 23 June 2017, 07:04:51 UTC
Input: synaptics-rmi4 - only read the F54 query registers which are used
Tip revision: 9768935
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include
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lib
mm
net
samples
scripts
security
sound
tools
usr
virt
.cocciconfig -rw-r--r-- 59 bytes
.get_maintainer.ignore -rw-r--r-- 31 bytes
.gitattributes -rw-r--r-- 30 bytes
.gitignore -rw-r--r-- 1.3 KB
.mailmap -rw-r--r-- 8.1 KB
COPYING -rw-r--r-- 18.3 KB
CREDITS -rw-r--r-- 96.2 KB
Kbuild -rw-r--r-- 2.2 KB
Kconfig -rw-r--r-- 252 bytes
MAINTAINERS -rw-r--r-- 397.7 KB
Makefile -rw-r--r-- 58.6 KB
README -rw-r--r-- 722 bytes

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