linux-kernel - Re: [PATCH v2 3/3] bus: stm32_firewall: Use scoped allocation to simplify cleanup

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Message-ID: <ccebe9a6-34e7-4699-a4ff-1ee925f9c150@oss.qualcomm.com>
Date: Fri, 9 Jan 2026 12:55:50 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>
To: Gatien CHEVALLIER <gatien.chevallier@...s.st.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org
Cc: Jonathan Cameron <jonathan.cameron@...wei.com>
Subject: Re: [PATCH v2 3/3] bus: stm32_firewall: Use scoped allocation to
 simplify cleanup

On 09/01/2026 11:37, Gatien CHEVALLIER wrote:
> On 1/5/26 15:37, Krzysztof Kozlowski wrote:
>> Allocate the memory with scoped/cleanup.h to reduce error handling and
>> make the code a bit simpler.
>>
>> Suggested-by: Jonathan Cameron <jonathan.cameron@...wei.com>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>
>>
>> ---
>>
>> Changes in v2:
>> 1. New patch
>> ---
>>   drivers/bus/stm32_firewall.c | 10 +++-------
>>   1 file changed, 3 insertions(+), 7 deletions(-)
>>
>> diff --git a/drivers/bus/stm32_firewall.c b/drivers/bus/stm32_firewall.c
>> index fae881cea9a0..92414a4c7bb1 100644
>> --- a/drivers/bus/stm32_firewall.c
>> +++ b/drivers/bus/stm32_firewall.c
>> @@ -240,7 +240,6 @@ EXPORT_SYMBOL_GPL(stm32_firewall_controller_unregister);
>>   
>>   int stm32_firewall_populate_bus(struct stm32_firewall_controller *firewall_controller)
>>   {
>> -	struct stm32_firewall *firewalls;
>>   	struct device *parent;
>>   	unsigned int i;
>>   	int len;
>> @@ -257,15 +256,14 @@ int stm32_firewall_populate_bus(struct stm32_firewall_controller *firewall_contr
>>   		if (len <= 0)
>>   			return -EINVAL;
>>   
>> -		firewalls = kcalloc(len, sizeof(*firewalls), GFP_KERNEL);
>> +		struct stm32_firewall *firewalls __free(kfree) =
>> +			kcalloc(len, sizeof(*firewalls), GFP_KERNEL);
> 
> Hello,
> 
> I'd prefer to keep declarations separated.

Separated how? This is the coding style of cleanup (which is quite
explicit around other styles)? Or you meant one line without wrapping?

> 
> Otherwise:
> 
> Tested-by: Gatien Chevallier <gatien.chevallier@...s.st.com>
> 



Best regards,
Krzysztof