linux-kernel - Re: [PATCH] ahci: Store irq number in struct ahci_host

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Message-ID: <20150527181415.GS7099@htj.duckdns.org>
Date:	Wed, 27 May 2015 14:14:15 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Robert Richter <robert.richter@...iumnetworks.com>
Cc:	Robert Richter <rric@...nel.org>,
	Hans de Goede <hdegoede@...hat.com>,
	Sunil Goutham <sgoutham@...ium.com>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] ahci: Store irq number in struct ahci_host_priv

Hello,

On Wed, May 27, 2015 at 06:16:03PM +0200, Robert Richter wrote:
> From b50a5e478b8fce17603a91a5d272bb49527239af Mon Sep 17 00:00:00 2001
> From: Robert Richter <rrichter@...ium.com>
> Date: Tue, 12 May 2015 13:57:27 +0200
> Subject: [PATCH] ahci: Store irq number in struct ahci_host_priv
> 

Currently, ahci supports only msi and intx; however, msix support is
planned for ....

> The irq number for msix devices is taken from msi_list instead of
> pci_dev. Thus, the irq number of a device needs to be stored in struct
> ahci_host_priv now.  Host controller can be activated then in a
> generic way.

The above paragraph doesn't really explain why it needs to be moved to
host_priv, does it?  Can you please elaborate a bit further?

> diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
> index 1add5baec584..1c99402a1017 100644
> --- a/drivers/ata/libahci.c
> +++ b/drivers/ata/libahci.c
> @@ -2344,7 +2344,7 @@ static int ahci_port_start(struct ata_port *ap)
>  	/*
>  	 * Switch to per-port locking in case each port has its own MSI vector.
>  	 */
> -	if ((hpriv->flags & AHCI_HFLAG_MULTI_MSI)) {
> +	if (hpriv->flags & AHCI_HFLAG_MULTI_MSI) {

This sort of cleanups are fine but please mention them in the patch
description.

Thanks.

-- 
tejun
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