]> git.baikalelectronics.ru Git - kernel.git/commit
HID: rmi: do not fetch more than 16 bytes in a query
authorBenjamin Tissoires <benjamin.tissoires@redhat.com>
Thu, 24 Apr 2014 22:26:38 +0000 (18:26 -0400)
committerJiri Kosina <jkosina@suse.cz>
Tue, 13 May 2014 14:42:50 +0000 (16:42 +0200)
commitc24c238aa7fb401f07b0e56f308a58488d381a0e
treeb699e7bed4a729a10bf0fa5cb110bbd44483a167
parent857cdc7e1300c1fd76a951b684782591e680b704
HID: rmi: do not fetch more than 16 bytes in a query

A firmware bug is present on the XPS Haswell edition which silently
split the request in two responses when the caller ask for a read of
more than 16 bytes.
The FW sends the first 16 then the 4 next, but it says that it answered
the 20 bytes in the first report.

This occurs only on the retrieving of the min/max of X and Y of the F11
function.
We only use the first 10 bytes of the Ctrl register, so we can get only
those 10 bytes to prevent the bug from happening.

Resolves:
https://bugzilla.redhat.com/show_bug.cgi?id=1090161

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
drivers/hid/hid-rmi.c