linux-kernel - Re: [PATCH 05/25] scsi: hisi_sas: allocate memories and create pools

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Message-ID: <561CD1FB.1060003@linaro.org>
Date:	Tue, 13 Oct 2015 17:42:19 +0800
From:	zhangfei <zhangfei.gao@...aro.org>
To:	Arnd Bergmann <arnd@...db.de>, John Garry <john.garry@...wei.com>
CC:	James.Bottomley@...senpartnership.com,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	linuxarm@...wei.com, linux-scsi@...r.kernel.org,
	xuwei5@...ilicon.com, john.garry2@...l.dcu.ie, hare@...e.de
Subject: Re: [PATCH 05/25] scsi: hisi_sas: allocate memories and create pools

Hi, Arnd

On 10/12/2015 11:15 PM, Arnd Bergmann wrote:
> On Monday 12 October 2015 23:20:17 John Garry wrote:
>> +       interrupt_count = of_property_count_u32_elems(np, "interrupts");
>> +       if (interrupt_count < 0)
>> +               goto err_out;
>> +
>> +       if (of_property_read_u32(np, "#interrupt-cells", &interrupt_cells))
>> +               goto err_out;
>> +
>> +       hisi_hba->int_names = devm_kcalloc(&pdev->dev,
>> +                                          interrupt_count / interrupt_cells,
>> +                                          HISI_SAS_NAME_LEN,
>> +                                          GFP_KERNEL);
>>
>
> This computation looks wrong: the "interrupts" property refers to interrupts
> that are referenced by this node and provided by an interrupt-controller,
> while the "#interrupt-cells" property refers to interrupts provided by
> this node. They don't need to have any relation.
>
We will use of_irq_count instead.

Thanks
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