Messages in this thread | | | Date | Fri, 19 Aug 2016 09:45:08 +0200 | From | Benjamin Tissoires <> | Subject | Re: [PATCH] Input: synaptics-rmi4: Fix register descriptor subpacket map construction |
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Hi Andrew,
On Aug 18 2016 or thereabouts, Andrew Duggan wrote: > From: Andrew Duggan <aduggan@synaptics.com> > > The map_offset variable is specific to the register and needs to be reset > in the loop. Otherwise, subsequent register's subpacket maps will have > their bits set at the wrong index. This results in the max X and Y and > the resolution to not be set on some devices which use F12. > > Signed-off-by: Andrew Duggan <aduggan@synaptics.com> > Tested-by: Nitin Chaudhary <nitinchaudhary1289@gmail.com> > Cc: stable@vger.kernel.org > --- > In rmi_f12_read_sensor_tuning() we call rmi_register_desc_has_subpacket() > to check the subpacket map to make sure a subpacket exists to ensure that > the buffer contains the correct data. It happened that on my the test > devices the register we were checking was also the first register. This > issues showed up on newer devices where F12 CTRL 8 is not teh first control > register.
I just have one minor nitpick:
> > Thanks, > Andrew > > drivers/input/rmi4/rmi_driver.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/input/rmi4/rmi_driver.c b/drivers/input/rmi4/rmi_driver.c > index 2b6b97e..19843f1 100644 > --- a/drivers/input/rmi4/rmi_driver.c > +++ b/drivers/input/rmi4/rmi_driver.c > @@ -553,10 +553,10 @@ int rmi_read_register_desc(struct rmi_device *d, u16 addr, > goto free_struct_buff; > > reg = find_first_bit(rdesc->presense_map, RMI_REG_DESC_PRESENSE_BITS); > - map_offset = 0; > for (i = 0; i < rdesc->num_registers; i++) { > struct rmi_register_desc_item *item = &rdesc->registers[i]; > int reg_size = struct_buf[offset];
There should be a blank line here (coding style).
> + map_offset = 0;
I'd rather see this reset just before the do/while loop given that it's IMO clearer what is happening.
Anyway: Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cheers, Benjamin
> > ++offset; > if (reg_size == 0) { > -- > 2.7.4 >
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