* [PATCH v5 3/3] counter: 104-quad-8: Add lock guards - filter clock prescaler
@ 2020-03-16 12:50 Syed Nayyar Waris
2020-03-18 2:18 ` William Breathitt Gray
0 siblings, 1 reply; 4+ messages in thread
From: Syed Nayyar Waris @ 2020-03-16 12:50 UTC (permalink / raw)
To: vilhelm.gray; +Cc: jic23, linux-iio, linux-kernel
Add lock protection from race conditions to the 104-quad-8 counter
driver for filter clock prescaler code changes. Mutex calls used for
protection.
Signed-off-by: Syed Nayyar Waris <syednwaris@gmail.com>
---
Changes in v5:
- Change spin lock calls to mutex lock calls.
- Modify the title description.
drivers/counter/104-quad-8.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/counter/104-quad-8.c b/drivers/counter/104-quad-8.c
index 9dab190..b268165 100644
--- a/drivers/counter/104-quad-8.c
+++ b/drivers/counter/104-quad-8.c
@@ -1230,6 +1230,8 @@ static ssize_t quad8_signal_fck_prescaler_write(struct counter_device *counter,
if (ret)
return ret;
+ mutex_lock(&priv->lock);
+
priv->fck_prescaler[channel_id] = prescaler;
/* Reset Byte Pointer */
@@ -1240,6 +1242,8 @@ static ssize_t quad8_signal_fck_prescaler_write(struct counter_device *counter,
outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC,
base_offset + 1);
+ mutex_unlock(&priv->lock);
+
return len;
}
--
2.7.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH v5 3/3] counter: 104-quad-8: Add lock guards - filter clock prescaler
2020-03-16 12:50 [PATCH v5 3/3] counter: 104-quad-8: Add lock guards - filter clock prescaler Syed Nayyar Waris
@ 2020-03-18 2:18 ` William Breathitt Gray
2020-06-07 5:25 ` Syed Nayyar Waris
0 siblings, 1 reply; 4+ messages in thread
From: William Breathitt Gray @ 2020-03-18 2:18 UTC (permalink / raw)
To: Syed Nayyar Waris, jic23; +Cc: linux-iio, linux-kernel
[-- Attachment #1: Type: text/plain, Size: 465 bytes --]
On Mon, Mar 16, 2020 at 06:20:46PM +0530, Syed Nayyar Waris wrote:
> Add lock protection from race conditions to the 104-quad-8 counter
> driver for filter clock prescaler code changes. Mutex calls used for
> protection.
>
> Signed-off-by: Syed Nayyar Waris <syednwaris@gmail.com>
> ---
> Changes in v5:
> - Change spin lock calls to mutex lock calls.
> - Modify the title description.
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v5 3/3] counter: 104-quad-8: Add lock guards - filter clock prescaler
2020-03-18 2:18 ` William Breathitt Gray
@ 2020-06-07 5:25 ` Syed Nayyar Waris
2020-06-14 13:48 ` Jonathan Cameron
0 siblings, 1 reply; 4+ messages in thread
From: Syed Nayyar Waris @ 2020-06-07 5:25 UTC (permalink / raw)
To: William Breathitt Gray
Cc: Jonathan Cameron, linux-iio, Linux Kernel Mailing List
On Wed, Mar 18, 2020 at 7:48 AM William Breathitt Gray
<vilhelm.gray@gmail.com> wrote:
>
> On Mon, Mar 16, 2020 at 06:20:46PM +0530, Syed Nayyar Waris wrote:
> > Add lock protection from race conditions to the 104-quad-8 counter
> > driver for filter clock prescaler code changes. Mutex calls used for
> > protection.
> >
> > Signed-off-by: Syed Nayyar Waris <syednwaris@gmail.com>
> > ---
> > Changes in v5:
> > - Change spin lock calls to mutex lock calls.
> > - Modify the title description.
>
> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Adding the 'Fixes' tag:
Fixes: 9b74dddf79be ("counter: 104-quad-8: Support Filter Clock Prescaler")
Regards
Syed Nayyar Waris
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH v5 3/3] counter: 104-quad-8: Add lock guards - filter clock prescaler
2020-06-07 5:25 ` Syed Nayyar Waris
@ 2020-06-14 13:48 ` Jonathan Cameron
0 siblings, 0 replies; 4+ messages in thread
From: Jonathan Cameron @ 2020-06-14 13:48 UTC (permalink / raw)
To: Syed Nayyar Waris
Cc: William Breathitt Gray, linux-iio, Linux Kernel Mailing List
On Sun, 7 Jun 2020 10:55:08 +0530
Syed Nayyar Waris <syednwaris@gmail.com> wrote:
> On Wed, Mar 18, 2020 at 7:48 AM William Breathitt Gray
> <vilhelm.gray@gmail.com> wrote:
> >
> > On Mon, Mar 16, 2020 at 06:20:46PM +0530, Syed Nayyar Waris wrote:
> > > Add lock protection from race conditions to the 104-quad-8 counter
> > > driver for filter clock prescaler code changes. Mutex calls used for
> > > protection.
> > >
> > > Signed-off-by: Syed Nayyar Waris <syednwaris@gmail.com>
> > > ---
> > > Changes in v5:
> > > - Change spin lock calls to mutex lock calls.
> > > - Modify the title description.
> >
> > Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
>
> Adding the 'Fixes' tag:
>
> Fixes: 9b74dddf79be ("counter: 104-quad-8: Support Filter Clock Prescaler")
Replace hash with upstream one and applied to the fixes-togreg branch of iio.git
Thanks,
Jonathan
>
> Regards
> Syed Nayyar Waris
^ permalink raw reply [flat|nested] 4+ messages in thread
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2020-03-16 12:50 [PATCH v5 3/3] counter: 104-quad-8: Add lock guards - filter clock prescaler Syed Nayyar Waris
2020-03-18 2:18 ` William Breathitt Gray
2020-06-07 5:25 ` Syed Nayyar Waris
2020-06-14 13:48 ` Jonathan Cameron
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