linux-kernel - RE: [PATCH v2 -next] crypto: inside-secure

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Date:   Wed, 4 Sep 2019 11:57:24 +0000
From:   Pascal Van Leeuwen <pvanleeuwen@...imatrix.com>
To:     YueHaibing <yuehaibing@...wei.com>,
        "antoine.tenart@...tlin.com" <antoine.tenart@...tlin.com>,
        "herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "pvanleeuwen@...idesecure.com" <pvanleeuwen@...idesecure.com>
CC:     "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 -next] crypto: inside-secure - Fix build error without
 CONFIG_PCI


> -----Original Message-----
> From: linux-crypto-owner@...r.kernel.org <linux-crypto-owner@...r.kernel.org> On Behalf Of
> YueHaibing
> Sent: Tuesday, September 3, 2019 3:45 AM
> To: antoine.tenart@...tlin.com; herbert@...dor.apana.org.au; davem@...emloft.net;
> pvanleeuwen@...idesecure.com
> Cc: linux-crypto@...r.kernel.org; linux-kernel@...r.kernel.org; YueHaibing
> <yuehaibing@...wei.com>
> Subject: [PATCH v2 -next] crypto: inside-secure - Fix build error without CONFIG_PCI
> 
> If CONFIG_PCI is not set, building fails:
> 
> rivers/crypto/inside-secure/safexcel.c: In function safexcel_request_ring_irq:
> drivers/crypto/inside-secure/safexcel.c:944:9: error: implicit declaration of function
> pci_irq_vector;
>  did you mean rcu_irq_enter? [-Werror=implicit-function-declaration]
>    irq = pci_irq_vector(pci_pdev, irqid);
>          ^~~~~~~~~~~~~~
> 
> Use #ifdef block to guard this.
> 
Actually, this is interesting. My *original* implementation was using
straight #ifdefs, but then I got review feedback stating that I should not
do that, as it's not compile testable, suggesting to use regular C if's
instead. Then there was quite some back-and-forth on the actual
implementation and I ended up with this.

So now it turns out that doesn't work and I'm suggested to go full-circle
back to straight #ifdef's? Or is there some other way to make this work?
Because I don't know where to go from here ...

> Fixes: 625f269a5a7a ("crypto: inside-secure - add support for PCI based FPGA development
> board")
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> ---
> v2: use 'ifdef' instead of 'IS_ENABLED'
> ---
>  drivers/crypto/inside-secure/safexcel.c | 13 ++++++++++---
>  1 file changed, 10 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/crypto/inside-secure/safexcel.c b/drivers/crypto/inside-
> secure/safexcel.c
> index e12a2a3..5253900 100644
> --- a/drivers/crypto/inside-secure/safexcel.c
> +++ b/drivers/crypto/inside-secure/safexcel.c
> @@ -937,7 +937,8 @@ static int safexcel_request_ring_irq(void *pdev, int irqid,
>  	int ret, irq;
>  	struct device *dev;
> 
> -	if (IS_ENABLED(CONFIG_PCI) && is_pci_dev) {
> +#ifdef CONFIG_PCI
> +	if (is_pci_dev) {
>  		struct pci_dev *pci_pdev = pdev;
> 
>  		dev = &pci_pdev->dev;
> @@ -947,7 +948,10 @@ static int safexcel_request_ring_irq(void *pdev, int irqid,
>  				irqid, irq);
>  			return irq;
>  		}
> -	} else if (IS_ENABLED(CONFIG_OF)) {
> +	} else
> +#endif
> +	{
> +#ifdef CONFIG_OF
>  		struct platform_device *plf_pdev = pdev;
>  		char irq_name[6] = {0}; /* "ringX\0" */
> 
> @@ -960,6 +964,7 @@ static int safexcel_request_ring_irq(void *pdev, int irqid,
>  				irq_name, irq);
>  			return irq;
>  		}
> +#endif
>  	}
> 
>  	ret = devm_request_threaded_irq(dev, irq, handler,
> @@ -1137,7 +1142,8 @@ static int safexcel_probe_generic(void *pdev,
> 
>  	safexcel_configure(priv);
> 
> -	if (IS_ENABLED(CONFIG_PCI) && priv->version == EIP197_DEVBRD) {
> +#ifdef CONFIG_PCI
> +	if (priv->version == EIP197_DEVBRD) {
>  		/*
>  		 * Request MSI vectors for global + 1 per ring -
>  		 * or just 1 for older dev images
> @@ -1153,6 +1159,7 @@ static int safexcel_probe_generic(void *pdev,
>  			return ret;
>  		}
>  	}
> +#endif
> 
>  	/* Register the ring IRQ handlers and configure the rings */
>  	priv->ring = devm_kcalloc(dev, priv->config.rings,
> --
> 2.7.4
> 

Regards,
Pascal van Leeuwen
Silicon IP Architect, Multi-Protocol Engines @ Verimatrix
www.insidesecure.com