linux-kernel - Re: [PATCH v2] firmware: turris-mox-rwtm: Fix an error handling path in mox_get_board

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Date:   Tue, 11 Jul 2023 18:44:36 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Marek Behún <kabel@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH v2] firmware: turris-mox-rwtm: Fix an error handling path
 in mox_get_board_info()

Le 17/02/2023 à 12:21, Marek Behún a écrit :
> On Wed, 15 Feb 2023 10:30:02 +0100
> Christophe JAILLET <christophe.jaillet@...adoo.fr> wrote:
> 
>> wait_for_completion_timeout() returns 0 if timed out, and positive (at
>> least 1, or number of jiffies left till timeout) if completed.
>>
>> In case of timeout, return -ETIMEDOUT.
>>
>> Fixes: 389711b37493 ("firmware: Add Turris Mox rWTM firmware driver")
>> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
>> ---
>> Compile tested only.
>>
>> v2:
>>     - Fix some other wait_for_completion_timeout() calls
>>
>> ---
>>   drivers/firmware/turris-mox-rwtm.c | 12 ++++++------
>>   1 file changed, 6 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/firmware/turris-mox-rwtm.c b/drivers/firmware/turris-mox-rwtm.c
>> index 6ea5789a89e2..d6fc37ba897d 100644
>> --- a/drivers/firmware/turris-mox-rwtm.c
>> +++ b/drivers/firmware/turris-mox-rwtm.c
>> @@ -200,8 +200,8 @@ static int mox_get_board_info(struct mox_rwtm *rwtm)
>>   		return ret;
>>   
>>   	ret = wait_for_completion_timeout(&rwtm->cmd_done, HZ / 2);
>> -	if (ret < 0)
>> -		return ret;
>> +	if (ret == 0)
>> +		return -ETIMEDOUT;
>>   
>>   	ret = mox_get_status(MBOX_CMD_BOARD_INFO, reply->retval);
>>   	if (ret == -ENODATA) {
>> @@ -236,8 +236,8 @@ static int mox_get_board_info(struct mox_rwtm *rwtm)
>>   		return ret;
>>   
>>   	ret = wait_for_completion_timeout(&rwtm->cmd_done, HZ / 2);
>> -	if (ret < 0)
>> -		return ret;
>> +	if (ret == 0)
>> +		return -ETIMEDOUT;
>>   
>>   	ret = mox_get_status(MBOX_CMD_ECDSA_PUB_KEY, reply->retval);
>>   	if (ret == -ENODATA) {
>> @@ -275,8 +275,8 @@ static int check_get_random_support(struct mox_rwtm *rwtm)
>>   		return ret;
>>   
>>   	ret = wait_for_completion_timeout(&rwtm->cmd_done, HZ / 2);
>> -	if (ret < 0)
>> -		return ret;
>> +	if (ret == 0)
>> +		return -ETIMEDOUT;
>>   
>>   	return mox_get_status(MBOX_CMD_GET_RANDOM, rwtm->reply.retval);
>>   }
> 
> Reviewed-by: Marek Behún <kabel@...nel.org>
> 

Hi,
polite reminder.

CJ