linux-kernel - crypto: stm32 - Fix last sparse warning in stm32_cryp_check_ctr

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Message-ID: <20210104061545.GA18641@gondor.apana.org.au>
Date:   Mon, 4 Jan 2021 17:15:45 +1100
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>
Subject: crypto: stm32 - Fix last sparse warning in
 stm32_cryp_check_ctr_counter

On Tue, Dec 29, 2020 at 11:26:45AM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   dea8dcf2a9fa8cc540136a6cd885c3beece16ec3
> commit: bbb2832620ac4e136416aa97af7310636422dea9 crypto: stm32 - Fix sparse warnings
> date:   4 months ago
> config: arm-randconfig-s032-20201220 (attached as .config)
> compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
> reproduce:
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # apt-get install sparse
>         # sparse version: v0.6.3-184-g1b896707-dirty
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bbb2832620ac4e136416aa97af7310636422dea9
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout bbb2832620ac4e136416aa97af7310636422dea9
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
> 
> 
> "sparse warnings: (new ones prefixed by >>)"
> >> drivers/crypto/stm32/stm32-cryp.c:1232:47: sparse: sparse: incorrect type in argument 2 (different base types) @@     expected restricted __be32 [usertype] *[assigned] iv @@     got unsigned int [usertype] * @@
>    drivers/crypto/stm32/stm32-cryp.c:1232:47: sparse:     expected restricted __be32 [usertype] *[assigned] iv
>    drivers/crypto/stm32/stm32-cryp.c:1232:47: sparse:     got unsigned int [usertype] *

This patch should fix the problem.

---8<---
This patch changes the cast in stm32_cryp_check_ctr_counter from
u32 to __be32 to match the prototype of stm32_cryp_hw_write_iv
correctly.

Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

diff --git a/drivers/crypto/stm32/stm32-cryp.c b/drivers/crypto/stm32/stm32-cryp.c
index 2670c30332fa..2a4793176c71 100644
--- a/drivers/crypto/stm32/stm32-cryp.c
+++ b/drivers/crypto/stm32/stm32-cryp.c
@@ -1229,7 +1229,7 @@ static void stm32_cryp_check_ctr_counter(struct stm32_cryp *cryp)
 		cr = stm32_cryp_read(cryp, CRYP_CR);
 		stm32_cryp_write(cryp, CRYP_CR, cr & ~CR_CRYPEN);
 
-		stm32_cryp_hw_write_iv(cryp, (u32 *)cryp->last_ctr);
+		stm32_cryp_hw_write_iv(cryp, (__be32 *)cryp->last_ctr);
 
 		stm32_cryp_write(cryp, CRYP_CR, cr);
 	}
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt