linux-kernel - Re: [PATCH] iio: temperature: mlx90635: Fix ERR_PTR dereference in mlx90635

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Date: Tue, 14 May 2024 01:42:25 +0530
From: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
To: Crt Mori <cmo@...exis.com>
Cc: Jonathan Cameron <jic23@...nel.org>, Lars-Peter Clausen
 <lars@...afoo.de>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        dan.carpenter@...aro.org, kernel-janitors@...r.kernel.org,
        error27@...il.com
Subject: Re: [PATCH] iio: temperature: mlx90635: Fix ERR_PTR dereference in
 mlx90635_probe()

Hi Crt,

On 14/05/24 01:32, Crt Mori wrote:
> Hi,
> I agree it is is copy-paste error. Minor remark below and a few typo
> fixes in commit message. Thanks for your contribution.
> 
> Reviewed-by: Crt Mori<cmo@...exis.com>
> 

Thanks for the review.


> On Mon, 13 May 2024 at 20:47, Harshit Mogalapalli
> <harshit.m.mogalapalli@...cle.com> wrote:
>>
>> When devm_regmap_init_i2c() fails, ragmap_ee could be error pointer,
> When devm_regmap_init_i2c() fails, regmap_ee could be error pointer,
> 

Oops, sorry for the typo, I will fix it in V2.

>> instead of checking for IS_ERR(ragmap_ee), regmap is checked which looks
> instead of checking for IS_ERR(regmap_ee), regmap is checked which looks
>> like a copy paste error.
>>
>> Fixes: a1d1ba5e1c28 ("iio: temperature: mlx90635 MLX90635 IR Temperature sensor")
>> Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
>> ---
>> This is found using smatch, only compile tested.
>> ---
>>   drivers/iio/temperature/mlx90635.c | 4 ++--
>>   1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/iio/temperature/mlx90635.c b/drivers/iio/temperature/mlx90635.c
>> index 1f5c962c1818..2b61489d5ee0 100644
>> --- a/drivers/iio/temperature/mlx90635.c
>> +++ b/drivers/iio/temperature/mlx90635.c
>> @@ -947,8 +947,8 @@ static int mlx90635_probe(struct i2c_client *client)
>>                                       "failed to allocate regmap\n");
>>
>>          regmap_ee = devm_regmap_init_i2c(client, &mlx90635_regmap_ee);
>> -       if (IS_ERR(regmap))
>> -               return dev_err_probe(&client->dev, PTR_ERR(regmap),
>> +       if (IS_ERR(regmap_ee))
>> +               return dev_err_probe(&client->dev, PTR_ERR(regmap_ee),
>>                                       "failed to allocate regmap\n");
> 
> Maybe fix her would also be to this regmap error message to include
> regmap EEPROM?
> 
Should we make it like:

"failed to allocate EEPROM regmap\n" ?

Thanks,
Harshit


>>
>>          mlx90635 = iio_priv(indio_dev);
>> --
>> 2.39.3
>>