K 10
svn:author
V 8
dumbbell
K 8
svn:date
V 27
2018-01-20T11:02:18.975982Z
K 7
svn:log
V 663
psm: Skip sync check when `PSM_CONFIG_NOCHECKSYNC` is set

In psmprobe(), we set the initial `syncmask` to the vendor default value
if the `PSM_CONFIG_NOCHECKSYNC` bit is unset. However, we currently only
set it for the Elantech touchpad later in psmattach(), thus `syncmask`
is always configured.

Now, we check `PSM_CONFIG_NOCHECKSYNC` and skip sync check if it is set.
This fixes Elantech touchpad support for units which have `hascrc` set.

To clarify that, when we log the `syncmask` and `syncbits` fields, also
mention if they are actually used.

Finally, when we set `PSM_CONFIG_NOCHECKSYNC`, clear `PSM_NEED_SYNCBITS`
flag.

PR:		225338
MFC after:	1 week

END