linux-kernel - Re: [PATCH] firmware: ti_sci: Use devm_bitmap

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Date:   Mon, 31 Oct 2022 21:40:39 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Nishanth Menon <nm@...com>
Cc:     kristo@...nel.org, ssantosh@...nel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] firmware: ti_sci: Use devm_bitmap_zalloc when applicable

Le 27/09/2021 à 15:38, Nishanth Menon a écrit :
> On 14:36-20210926, Christophe JAILLET wrote:
>> 'xfer_alloc_table' is a bitmap. So use 'devm_bitmap_zalloc()' to simplify
>> code and improve the semantic of the code.
>>
>> While at it, remove a redundant 'bitmap_zero()' call.
>>
>> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
>> ---
>>   drivers/firmware/ti_sci.c | 8 +++-----
>>   1 file changed, 3 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
>> index 235c7e7869aa..a33eb884102f 100644
>> --- a/drivers/firmware/ti_sci.c
>> +++ b/drivers/firmware/ti_sci.c
>> @@ -3352,13 +3352,11 @@ static int ti_sci_probe(struct platform_device *pdev)
>>   	if (!minfo->xfer_block)
>>   		return -ENOMEM;
>>   
>> -	minfo->xfer_alloc_table = devm_kcalloc(dev,
>> -					       BITS_TO_LONGS(desc->max_msgs),
>> -					       sizeof(unsigned long),
>> -					       GFP_KERNEL);
>> +	minfo->xfer_alloc_table = devm_bitmap_zalloc(dev,
>> +						     desc->max_msgs,
>> +						     GFP_KERNEL);
>>   	if (!minfo->xfer_alloc_table)
>>   		return -ENOMEM;
>> -	bitmap_zero(minfo->xfer_alloc_table, desc->max_msgs);
>>   
>>   	/* Pre-initialize the buffer pointer to pre-allocated buffers */
>>   	for (i = 0, xfer = minfo->xfer_block; i < desc->max_msgs; i++, xfer++) {
>> -- 
>> 2.30.2
>>
> 
> Reviewed-by: Nishanth Menon <nm@...com>
> 

Hi,

another similar patch has been merged against 
'drivers/firmware/ti_sci.c' just a few days ago, so this one could also 
be applied.

Let me know if I need to rebase and/or resend it.

CJ