linux-kernel - Re: [PATCH] iio: light: isl29125: use iio helper function to guarantee direct mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <af8c4f98-9f48-def2-2753-755a11af4979@kernel.org>
Date:	Sat, 11 Jun 2016 16:57:57 +0100
From:	Jonathan Cameron <jic23@...nel.org>
To:	Peter Meerwald-Stadler <pmeerw@...erw.net>,
	Alison Schofield <amsfield22@...il.com>
Cc:	knaack.h@....de, lars@...afoo.de, linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iio: light: isl29125: use iio helper function to
 guarantee direct mode

On 07/06/16 06:23, Peter Meerwald-Stadler wrote:
> 
>> Replace the code that guarantees the device stays in direct mode
>> with iio_device_claim_direct_mode() which does same.  This allows
>> removal of an unused lock in the device private global data.
> 
> nice!
> Acked-by: Peter Meerwald-Stadler <pmeerw@...erw.net>
Applied and pushed out as testing for the autobuilders to play with it.

Thanks,

Jonathan
> 
>> Signed-off-by: Alison Schofield <amsfield22@...il.com>
>> Cc: Daniel Baluta <daniel.baluta@...il.com>
>> ---
>>  drivers/iio/light/isl29125.c | 10 ++++------
>>  1 file changed, 4 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/iio/light/isl29125.c b/drivers/iio/light/isl29125.c
>> index e2945a2..a6b9d66 100644
>> --- a/drivers/iio/light/isl29125.c
>> +++ b/drivers/iio/light/isl29125.c
>> @@ -50,7 +50,6 @@
>>  
>>  struct isl29125_data {
>>  	struct i2c_client *client;
>> -	struct mutex lock;
>>  	u8 conf1;
>>  	u16 buffer[8]; /* 3x 16-bit, padding, 8 bytes timestamp */
>>  };
>> @@ -128,11 +127,11 @@ static int isl29125_read_raw(struct iio_dev *indio_dev,
>>  
>>  	switch (mask) {
>>  	case IIO_CHAN_INFO_RAW:
>> -		if (iio_buffer_enabled(indio_dev))
>> -			return -EBUSY;
>> -		mutex_lock(&data->lock);
>> +		ret = iio_device_claim_direct_mode(indio_dev);
>> +		if (ret)
>> +			return ret;
>>  		ret = isl29125_read_data(data, chan->scan_index);
>> -		mutex_unlock(&data->lock);
>> +		iio_device_release_direct_mode(indio_dev);
>>  		if (ret < 0)
>>  			return ret;
>>  		*val = ret;
>> @@ -259,7 +258,6 @@ static int isl29125_probe(struct i2c_client *client,
>>  	data = iio_priv(indio_dev);
>>  	i2c_set_clientdata(client, indio_dev);
>>  	data->client = client;
>> -	mutex_init(&data->lock);
>>  
>>  	indio_dev->dev.parent = &client->dev;
>>  	indio_dev->info = &isl29125_info;
>>
>