linux-kernel - Re: [PATCH 2/2] staging: vchiq_arm: Use devm

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Message-ID: <bc535633-8489-4eb4-99ce-f9671eb054e1@ideasonboard.com>
Date: Sun, 13 Oct 2024 16:06:24 +0530
From: Umang Jain <umang.jain@...asonboard.com>
To: Stefan Wahren <wahrenst@....net>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>
Cc: linux-rpi-kernel@...ts.infradead.org,
 linux-arm-kernel@...ts.infradead.org, linux-staging@...ts.linux.dev,
 linux-kernel@...r.kernel.org,
 Kieran Bingham <kieran.bingham@...asonboard.com>,
 Dan Carpenter <dan.carpenter@...aro.org>,
 Laurent Pinchart <laurent.pinchart@...asonboard.com>,
 kernel-list@...pberrypi.com
Subject: Re: [PATCH 2/2] staging: vchiq_arm: Use devm_kzalloc for mgmt



On 13/10/24 2:43 pm, Stefan Wahren wrote:
> Hi Umang,
>
> Am 13.10.24 um 10:45 schrieb Umang Jain:
>> Signed-off-by: Umang Jain <umang.jain@...asonboard.com>
> except of the missing commit message, this patch looks good to me. I
> understand the concerns about devm_kzalloc, but I think this doesn't
> apply in this case.

That's what I was wondering as well, since I tried module unloading and 
with the cdev also goes away? So shouldn't be conern, right ?

>
> Since this should be treated as RFC, is it already tested?

yes, it was tested
>
> Regards
>> ---
>>   drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c | 4 +---
>>   1 file changed, 1 insertion(+), 3 deletions(-)
>>
>> diff --git 
>> a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c 
>> b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
>> index e780ed714a14..334fb7037766 100644
>> --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
>> +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
>> @@ -1345,7 +1345,7 @@ static int vchiq_probe(struct platform_device 
>> *pdev)
>>           return -ENOENT;
>>       }
>>
>> -    mgmt = kzalloc(sizeof(*mgmt), GFP_KERNEL);
>> +    mgmt = devm_kzalloc(&pdev->dev, sizeof(*mgmt), GFP_KERNEL);
>>       if (!mgmt)
>>           return -ENOMEM;
>>
>> @@ -1403,8 +1403,6 @@ static void vchiq_remove(struct platform_device 
>> *pdev)
>>
>>       arm_state = vchiq_platform_get_arm_state(&mgmt->state);
>>       kthread_stop(arm_state->ka_thread);
>> -
>> -    kfree(mgmt);
>>   }
>>
>>   static struct platform_driver vchiq_driver = {
>