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To: Markus Theil <markus.theil@tu-ilmenau.de>, dev@dpdk.org
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From: Ferruh Yigit <ferruh.yigit@intel.com>
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Date: Mon, 4 Sep 2017 13:43:51 +0100
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Subject: Re: [dpdk-dev] [PATCH v5 4/5] igb_uio: use msi mask functions from
 kernel, little corrections
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On 8/31/2017 10:46 PM, Markus Theil wrote:
> This patch substitutes the custom MSI/MSI-X mask code and uses
> already existing kernel APIs. Feedback/small corrections to the previous
> patch of this series are also incorporated.
> 
> Signed-off-by: Markus Theil <markus.theil@tu-ilmenau.de>

<...>

> +	if (udev->mode == RTE_INTR_MODE_MSIX || udev->mode == RTE_INTR_MODE_MSI) {
> +#ifdef HAVE_PCI_MSI_MASK_IRQ
> +		if (irq_state == 1)
> +			pci_msi_unmask_irq(irq);
> +		else
> +			pci_msi_mask_irq(irq);

It is an option to keep using mask_msi_irq() without #ifdef, it seems in
newer version of the kernel mask_msi_irq() is already wrapper to the
pci_msi_mask_irq().

Although this may make the code simpler, it can break it if
mask_msi_irq() wrapper removed.

I would go with using mask_msi_irq() directly, but no strong opinion...

<...>