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

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Message-ID: <13409618.ra2GB8eyNb@wuerfel>
Date:	Mon, 12 Oct 2015 17:15:28 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	John Garry <john.garry@...wei.com>
Cc:	James.Bottomley@...senpartnership.com,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	linuxarm@...wei.com, zhangfei.gao@...aro.org,
	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

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.

	Arnd
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