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SubjectRE: [PATCH 1/3] crypto: inside-secure - Fix a maybe-uninitialized warning
Date
> -----Original Message-----
> From: Arnd Bergmann <arnd@arndb.de>
> Sent: Monday, September 30, 2019 2:15 PM
> To: Antoine Tenart <antoine.tenart@bootlin.com>; Herbert Xu <herbert@gondor.apana.org.au>;
> David S. Miller <davem@davemloft.net>
> Cc: Arnd Bergmann <arnd@arndb.de>; Pascal Van Leeuwen <pvanleeuwen@verimatrix.com>; Pascal van
> Leeuwen <pascalvanl@gmail.com>; linux-crypto@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: [PATCH 1/3] crypto: inside-secure - Fix a maybe-uninitialized warning
>
> A previous fixup avoided an unused variable warning but replaced
> it with a slightly scarier warning:
>
> drivers/crypto/inside-secure/safexcel.c:1100:6: error: variable 'irq' is used uninitialized
> whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized]
>
> This is harmless as it is impossible to get into this case, but
> the compiler has no way of knowing that. Add an explicit error
> handling case to make it obvious to both compilers and humans
> reading the source.
>
> Fixes: 212ef6f29e5b ("crypto: inside-secure - Fix unused variable warning when CONFIG_PCI=n")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
> drivers/crypto/inside-secure/safexcel.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/crypto/inside-secure/safexcel.c b/drivers/crypto/inside-secure/safexcel.c
> index 4ab1bde8dd9b..311bf60df39f 100644
> --- a/drivers/crypto/inside-secure/safexcel.c
> +++ b/drivers/crypto/inside-secure/safexcel.c
> @@ -1120,6 +1120,8 @@ static int safexcel_request_ring_irq(void *pdev, int irqid,
> irq_name, irq);
> return irq;
> }
> + } else {
> + return -ENXIO;
> }
>
> ret = devm_request_threaded_irq(dev, irq, handler,
> --
> 2.20.0

Ok, this won't hurt in any way I guess, so fine by me (assuming that error
code makes sense).

Acked-by: Pascal van Leeuwen <pvanleeuwen@verimatrix.com>


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

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