linux-kernel - Re: [PATCH v2 RESEND] rapidio/tsi721: Use pci_enable_msix_exact() instead of pci_enable

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Message-Id: <20140513144634.c7bc3d20db633f32fea913b6@linux-foundation.org>
Date:	Tue, 13 May 2014 14:46:34 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Alexander Gordeev <agordeev@...hat.com>
Cc:	linux-kernel@...r.kernel.org,
	Matt Porter <mporter@...nel.crashing.org>,
	Alexandre Bounine <alexandre.bounine@....com>,
	linux-pci@...r.kernel.org
Subject: Re: [PATCH v2 RESEND] rapidio/tsi721: Use pci_enable_msix_exact()
 instead of pci_enable_msix()

On Tue, 13 May 2014 17:01:32 +0200 Alexander Gordeev <agordeev@...hat.com> wrote:

> As result of deprecation of MSI-X/MSI enablement functions
> pci_enable_msix() and pci_enable_msi_block() all drivers
> using these two interfaces need to be updated to use the
> new pci_enable_msi_range()  or pci_enable_msi_exact()
> and pci_enable_msix_range() or pci_enable_msix_exact()
> interfaces.
> 

What (if any) runtime effect does this patch have?

> --- a/drivers/rapidio/devices/tsi721.c
> +++ b/drivers/rapidio/devices/tsi721.c
> @@ -768,15 +768,10 @@ static int tsi721_enable_msix(struct tsi721_device *priv)
>  	}
>  #endif /* CONFIG_RAPIDIO_DMA_ENGINE */
>  
> -	err = pci_enable_msix(priv->pdev, entries, ARRAY_SIZE(entries));
> +	err = pci_enable_msix_exact(priv->pdev, entries, ARRAY_SIZE(entries));
>  	if (err) {
> -		if (err > 0)
> -			dev_info(&priv->pdev->dev,
> -				 "Only %d MSI-X vectors available, "
> -				 "not using MSI-X\n", err);
> -		else
> -			dev_err(&priv->pdev->dev,
> -				"Failed to enable MSI-X (err=%d)\n", err);
> +		dev_err(&priv->pdev->dev,
> +			"Failed to enable MSI-X (err=%d)\n", err);
>  		return err;
>  	}
>  
> -- 
> 1.7.7.6
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