* RE: [PATCH] OMAP: Add keypad driver
2016-01-07 23:22 ` Dmitry Torokhov
@ 2016-01-08 0:08 ` Koskinen, Aaro (Nokia - FI/Espoo)
2016-01-08 0:13 ` Tony Lindgren
2016-01-08 0:10 ` Tony Lindgren
2016-01-08 1:41 ` Janusz Krzysztofik
2 siblings, 1 reply; 9+ messages in thread
From: Koskinen, Aaro (Nokia - FI/Espoo) @ 2016-01-08 0:08 UTC (permalink / raw)
To: EXT Dmitry Torokhov, Tony Lindgren
Cc: Dan Carpenter, Komal Shah, linux-input@vger.kernel.org,
Janusz Krzysztofik, linux-omap@vger.kernel.org
Hi,
> From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
>
> Commit da1f026b532ce944d74461497dc6d8c16456466e ("Keyboard: omap-keypad:
> use matrix_keypad.h") switched the driver to use matrix keypad
> infrastructure, which made array of keycodes to be unsigned short, and
> caused the test for negativity never trigger. This leads to the following
> static checker warning:
>
> drivers/input/keyboard/omap-keypad.c:158 omap_kp_tasklet()
> warn: 'keycodes[]' is never negative.
>
> Given that we did not care about this check for a few years already let's
> simply remove it.
>
> Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Aaro Koskinen <aaro.koskinen@nokia.com>
> ---
> drivers/input/keyboard/omap-keypad.c | 8 --------
> 1 file changed, 8 deletions(-)
>
> diff --git a/drivers/input/keyboard/omap-keypad.c b/drivers/input/keyboard/omap-keypad.c
> index 75ad666..e0d72c8 100644
> --- a/drivers/input/keyboard/omap-keypad.c
> +++ b/drivers/input/keyboard/omap-keypad.c
> @@ -155,14 +155,6 @@ static void omap_kp_tasklet(unsigned long data)
> "pressed" : "released");
> #else
> key = keycodes[MATRIX_SCAN_CODE(row, col, row_shift)];
> - if (key < 0) {
> - printk(KERN_WARNING
> - "omap-keypad: Spurious key event %d-%d\n",
> - col, row);
> - /* We scan again after a couple of seconds */
> - spurious = 1;
> - continue;
> - }
>
> if (!(kp_cur_group == (key & GROUP_MASK) ||
> kp_cur_group == -1))
Thanks,
A.
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [PATCH] OMAP: Add keypad driver
2016-01-08 0:08 ` Koskinen, Aaro (Nokia - FI/Espoo)
@ 2016-01-08 0:13 ` Tony Lindgren
0 siblings, 0 replies; 9+ messages in thread
From: Tony Lindgren @ 2016-01-08 0:13 UTC (permalink / raw)
To: Koskinen, Aaro (Nokia - FI/Espoo)
Cc: EXT Dmitry Torokhov, Dan Carpenter, Komal Shah,
linux-input@vger.kernel.org, Janusz Krzysztofik,
linux-omap@vger.kernel.org
* Koskinen, Aaro (Nokia - FI/Espoo) <aaro.koskinen@nokia.com> [160107 16:08]:
> Hi,
>
> > From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> >
> > Commit da1f026b532ce944d74461497dc6d8c16456466e ("Keyboard: omap-keypad:
> > use matrix_keypad.h") switched the driver to use matrix keypad
> > infrastructure, which made array of keycodes to be unsigned short, and
> > caused the test for negativity never trigger. This leads to the following
> > static checker warning:
> >
> > drivers/input/keyboard/omap-keypad.c:158 omap_kp_tasklet()
> > warn: 'keycodes[]' is never negative.
> >
> > Given that we did not care about this check for a few years already let's
> > simply remove it.
> >
> > Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
> > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
>
> Acked-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Heh sorry I mis-corrected your email in my reply, old habit you know :)
Tony
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH] OMAP: Add keypad driver
2016-01-07 23:22 ` Dmitry Torokhov
2016-01-08 0:08 ` Koskinen, Aaro (Nokia - FI/Espoo)
@ 2016-01-08 0:10 ` Tony Lindgren
2016-01-08 1:41 ` Janusz Krzysztofik
2 siblings, 0 replies; 9+ messages in thread
From: Tony Lindgren @ 2016-01-08 0:10 UTC (permalink / raw)
To: Dmitry Torokhov
Cc: Dan Carpenter, Komal Shah, linux-input@vger.kernel.org,
Janusz Krzysztofik, Aaro Koskinen, linux-omap
* Dmitry Torokhov <dmitry.torokhov@gmail.com> [160107 15:23]:
> On Thu, Jan 07, 2016 at 12:13:17PM -0800, Tony Lindgren wrote:
> >
> > Sounds like the check is not needed if it has not been used for
> > past five years, so my preference is option #1 then.
>
> OK, how about the below then?
Looks good to me thanks: Acked-by: Tony Lindgren <tony@atomide.com>
I've also corrected Aaro's email address, he may have some keyboard
input too.
Regards,
Tony
> Input: omap-keypad - remove dead check
>
> From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
>
> Commit da1f026b532ce944d74461497dc6d8c16456466e ("Keyboard: omap-keypad:
> use matrix_keypad.h") switched the driver to use matrix keypad
> infrastructure, which made array of keycodes to be unsigned short, and
> caused the test for negativity never trigger. This leads to the following
> static checker warning:
>
> drivers/input/keyboard/omap-keypad.c:158 omap_kp_tasklet()
> warn: 'keycodes[]' is never negative.
>
> Given that we did not care about this check for a few years already let's
> simply remove it.
>
> Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> ---
> drivers/input/keyboard/omap-keypad.c | 8 --------
> 1 file changed, 8 deletions(-)
>
> diff --git a/drivers/input/keyboard/omap-keypad.c b/drivers/input/keyboard/omap-keypad.c
> index 75ad666..e0d72c8 100644
> --- a/drivers/input/keyboard/omap-keypad.c
> +++ b/drivers/input/keyboard/omap-keypad.c
> @@ -155,14 +155,6 @@ static void omap_kp_tasklet(unsigned long data)
> "pressed" : "released");
> #else
> key = keycodes[MATRIX_SCAN_CODE(row, col, row_shift)];
> - if (key < 0) {
> - printk(KERN_WARNING
> - "omap-keypad: Spurious key event %d-%d\n",
> - col, row);
> - /* We scan again after a couple of seconds */
> - spurious = 1;
> - continue;
> - }
>
> if (!(kp_cur_group == (key & GROUP_MASK) ||
> kp_cur_group == -1))
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [PATCH] OMAP: Add keypad driver
2016-01-07 23:22 ` Dmitry Torokhov
2016-01-08 0:08 ` Koskinen, Aaro (Nokia - FI/Espoo)
2016-01-08 0:10 ` Tony Lindgren
@ 2016-01-08 1:41 ` Janusz Krzysztofik
2016-01-08 6:38 ` Dmitry Torokhov
2 siblings, 1 reply; 9+ messages in thread
From: Janusz Krzysztofik @ 2016-01-08 1:41 UTC (permalink / raw)
To: Dmitry Torokhov
Cc: Tony Lindgren, Dan Carpenter, Komal Shah,
linux-input@vger.kernel.org, Aaro Koskinen, linux-omap
On Thu, 7 Jan 2016 15:22:28 Dmitry Torokhov wrote:
> On Thu, Jan 07, 2016 at 12:13:17PM -0800, Tony Lindgren wrote:
> > * Dmitry Torokhov <dmitry.torokhov@gmail.com> [160107 10:54]:
> > > On Thu, Jan 7, 2016 at 1:37 AM, Dan Carpenter
<dan.carpenter@oracle.com> wrote:
> > > ...
> > > > 157 key =
keycodes[MATRIX_SCAN_CODE(row, col, row_shift)];
> > > > 158 if (key < 0) {
> > > > ^^^^^^^
> > > > Never true. Not sure what was intended.
> > >
> > > It looks like this check was broken by
> > > da1f026b532ce944d74461497dc6d8c16456466e (Keyboard: omap-keypad:
use
> > > matrix_keypad.h). Previously the driver would expect a list of
known
> > > keys and would scan it and return -1 if key was not found. Now we
have
> > > 2 options:
> > >
> > > 1. Simply remove the check
> > > 2. Change the condition to "if (key == KEY_RESERVED)"
> > >
> > > I do not really have preference. Tony?
> >
> > Sounds like the check is not needed if it has not been used for
> > past five years, so my preference is option #1 then.
>
> OK, how about the below then?
>
> --
> Dmitry
>
>
> Input: omap-keypad - remove dead check
>
> From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
>
> Commit da1f026b532ce944d74461497dc6d8c16456466e ("Keyboard:
> omap-keypad: use matrix_keypad.h") switched the driver to use matrix
> keypad infrastructure, which made array of keycodes to be unsigned
> short, and caused the test for negativity never trigger. This leads
> to the following>
> static checker warning:
> drivers/input/keyboard/omap-keypad.c:158 omap_kp_tasklet()
> warn: 'keycodes[]' is never negative.
>
> Given that we did not care about this check for a few years already
> let's simply remove it.
>
> Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> ---
>
> drivers/input/keyboard/omap-keypad.c | 8 --------
> 1 file changed, 8 deletions(-)
>
> diff --git a/drivers/input/keyboard/omap-keypad.c
> b/drivers/input/keyboard/omap-keypad.c index 75ad666..e0d72c8 100644
> --- a/drivers/input/keyboard/omap-keypad.c
> +++ b/drivers/input/keyboard/omap-keypad.c
> @@ -155,14 +155,6 @@ static void omap_kp_tasklet(unsigned long data)
> "pressed" : "released");
> #else
> key = keycodes[MATRIX_SCAN_CODE(row, col,
row_shift)];
> - if (key < 0) {
> - printk(KERN_WARNING
> - "omap-keypad: Spurious key event
%d-%d\n",
> - col, row);
> - /* We scan again after a couple of
seconds */
> - spurious = 1;
Hi,
That code was written before I played with it so I'm not really sure
about its purpose, but it looks to me like something intended as a
debouncer.
Since that was the only place where the spurious variable could be
modified, I think we should also remove the now unreachable code that
manipulates delay based on spurious value several lines below, as well
as declaration and initialization of spurious at the beginning of
omap_kp_tasklet().
Thanks,
Janusz
> - continue;
> - }
>
> if (!(kp_cur_group == (key & GROUP_MASK) ||
> kp_cur_group == -1))
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [PATCH] OMAP: Add keypad driver
2016-01-08 1:41 ` Janusz Krzysztofik
@ 2016-01-08 6:38 ` Dmitry Torokhov
0 siblings, 0 replies; 9+ messages in thread
From: Dmitry Torokhov @ 2016-01-08 6:38 UTC (permalink / raw)
To: Janusz Krzysztofik
Cc: Tony Lindgren, Dan Carpenter, Komal Shah,
linux-input@vger.kernel.org, Aaro Koskinen, linux-omap
On Fri, Jan 08, 2016 at 02:41:00AM +0100, Janusz Krzysztofik wrote:
> On Thu, 7 Jan 2016 15:22:28 Dmitry Torokhov wrote:
> > On Thu, Jan 07, 2016 at 12:13:17PM -0800, Tony Lindgren wrote:
> > > * Dmitry Torokhov <dmitry.torokhov@gmail.com> [160107 10:54]:
> > > > On Thu, Jan 7, 2016 at 1:37 AM, Dan Carpenter
> <dan.carpenter@oracle.com> wrote:
> > > > ...
> > > > > 157 key =
> keycodes[MATRIX_SCAN_CODE(row, col, row_shift)];
> > > > > 158 if (key < 0) {
> > > > > ^^^^^^^
> > > > > Never true. Not sure what was intended.
> > > >
> > > > It looks like this check was broken by
> > > > da1f026b532ce944d74461497dc6d8c16456466e (Keyboard: omap-keypad:
> use
> > > > matrix_keypad.h). Previously the driver would expect a list of
> known
> > > > keys and would scan it and return -1 if key was not found. Now we
> have
> > > > 2 options:
> > > >
> > > > 1. Simply remove the check
> > > > 2. Change the condition to "if (key == KEY_RESERVED)"
> > > >
> > > > I do not really have preference. Tony?
> > >
> > > Sounds like the check is not needed if it has not been used for
> > > past five years, so my preference is option #1 then.
> >
> > OK, how about the below then?
> >
> > --
> > Dmitry
> >
> >
> > Input: omap-keypad - remove dead check
> >
> > From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> >
> > Commit da1f026b532ce944d74461497dc6d8c16456466e ("Keyboard:
> > omap-keypad: use matrix_keypad.h") switched the driver to use matrix
> > keypad infrastructure, which made array of keycodes to be unsigned
> > short, and caused the test for negativity never trigger. This leads
> > to the following>
> > static checker warning:
> > drivers/input/keyboard/omap-keypad.c:158 omap_kp_tasklet()
> > warn: 'keycodes[]' is never negative.
> >
> > Given that we did not care about this check for a few years already
> > let's simply remove it.
> >
> > Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
> > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> > ---
> >
> > drivers/input/keyboard/omap-keypad.c | 8 --------
> > 1 file changed, 8 deletions(-)
> >
> > diff --git a/drivers/input/keyboard/omap-keypad.c
> > b/drivers/input/keyboard/omap-keypad.c index 75ad666..e0d72c8 100644
> > --- a/drivers/input/keyboard/omap-keypad.c
> > +++ b/drivers/input/keyboard/omap-keypad.c
> > @@ -155,14 +155,6 @@ static void omap_kp_tasklet(unsigned long data)
> > "pressed" : "released");
> > #else
> > key = keycodes[MATRIX_SCAN_CODE(row, col,
> row_shift)];
> > - if (key < 0) {
> > - printk(KERN_WARNING
> > - "omap-keypad: Spurious key event
> %d-%d\n",
> > - col, row);
> > - /* We scan again after a couple of
> seconds */
> > - spurious = 1;
>
> Hi,
>
> That code was written before I played with it so I'm not really sure
> about its purpose, but it looks to me like something intended as a
> debouncer.
>
> Since that was the only place where the spurious variable could be
> modified, I think we should also remove the now unreachable code that
> manipulates delay based on spurious value several lines below, as well
> as declaration and initialization of spurious at the beginning of
> omap_kp_tasklet().
Yeah, now that I look at it this driver needs some love. The probing is
racy, remove is incomplete, etc.
Do any of you guys have hardware that uses it?
Thanks.
--
Dmitry
^ permalink raw reply [flat|nested] 9+ messages in thread