linux-kernel - [PATCH] crypto: sun8i-ce - Fix writel byte-order on big-endian

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Message-ID: <20200728060040.GA15882@gondor.apana.org.au>
Date:   Tue, 28 Jul 2020 16:00:40 +1000
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     kernel test robot <lkp@...el.com>
Cc:     Corentin Labbe <clabbe.montjoie@...il.com>,
        kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [PATCH] crypto: sun8i-ce - Fix writel byte-order on big-endian

On Tue, Jul 28, 2020 at 01:10:13PM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   92ed301919932f777713b9172e525674157e983d
> commit: 93c7f4d357de68f1e3a998b2fc775466d75c4c07 crypto: sun8i-ce - enable working on big endian
> date:   8 months ago
> config: arm64-randconfig-s031-20200728 (attached as .config)
> compiler: aarch64-linux-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: v0.6.2-94-geb6779f6-dirty
>         git checkout 93c7f4d357de68f1e3a998b2fc775466d75c4c07
>         # 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=arm64 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>

This looks like a real bug.

---8<---
As writel does endianness swapping by default we need to undo
any swapping that we have done before using it.

Reported-by: kernel test robot <lkp@...el.com>
Fixes: 93c7f4d357de ("crypto: sun8i-ce - enable working on big...")
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c
index 138759dc8190..703a60d4e2f6 100644
--- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c
+++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c
@@ -120,7 +120,7 @@ int sun8i_ce_run_task(struct sun8i_ce_dev *ce, int flow, const char *name)
 	/* Be sure all data is written before enabling the task */
 	wmb();
 
-	v = 1 | (ce->chanlist[flow].tl->t_common_ctl & 0x7F) << 8;
+	v = 1 | (le32_to_cpu(ce->chanlist[flow].tl->t_common_ctl) & 0x7F) << 8;
 	writel(v, ce->base + CE_TLR);
 	mutex_unlock(&ce->mlock);
 
-- 
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