linux-kernel - Re: [PATCH v4 02/11] crypto: Add Allwinner sun8i-ce Crypto Engine

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Date:   Tue, 22 Oct 2019 12:23:12 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     kbuild@...ts.01.org, Corentin Labbe <clabbe.montjoie@...il.com>
Cc:     kbuild-all@...ts.01.org, catalin.marinas@....com,
        davem@...emloft.net, herbert@...dor.apana.org.au,
        linux@...linux.org.uk, mark.rutland@....com, mripard@...nel.org,
        robh+dt@...nel.org, wens@...e.org, will@...nel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com,
        Corentin Labbe <clabbe.montjoie@...il.com>
Subject: Re: [PATCH v4 02/11] crypto: Add Allwinner sun8i-ce Crypto Engine

Hi Corentin,

url:    https://github.com/0day-ci/linux/commits/Corentin-Labbe/crypto-add-sun8i-ce-driver-for-Allwinner-crypto-engine/20191014-104401
base:   https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>

smatch warnings:
drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c:371 sun8i_ce_allocate_chanlist() error: uninitialized symbol 'err'.

# https://github.com/0day-ci/linux/commit/f113059e7b4f94c545994aeafdc809a3e4907ae4
git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout f113059e7b4f94c545994aeafdc809a3e4907ae4
vim +/err +371 drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c

f113059e7b4f94 Corentin Labbe 2019-10-12  334  static int sun8i_ce_allocate_chanlist(struct sun8i_ce_dev *ce)
f113059e7b4f94 Corentin Labbe 2019-10-12  335  {
f113059e7b4f94 Corentin Labbe 2019-10-12  336  	int i, err;
f113059e7b4f94 Corentin Labbe 2019-10-12  337  
f113059e7b4f94 Corentin Labbe 2019-10-12  338  	ce->chanlist = devm_kcalloc(ce->dev, MAXFLOW,
f113059e7b4f94 Corentin Labbe 2019-10-12  339  				    sizeof(struct sun8i_ce_flow), GFP_KERNEL);
f113059e7b4f94 Corentin Labbe 2019-10-12  340  	if (!ce->chanlist)
f113059e7b4f94 Corentin Labbe 2019-10-12  341  		return -ENOMEM;
f113059e7b4f94 Corentin Labbe 2019-10-12  342  
f113059e7b4f94 Corentin Labbe 2019-10-12  343  	for (i = 0; i < MAXFLOW; i++) {
f113059e7b4f94 Corentin Labbe 2019-10-12  344  		init_completion(&ce->chanlist[i].complete);
f113059e7b4f94 Corentin Labbe 2019-10-12  345  
f113059e7b4f94 Corentin Labbe 2019-10-12  346  		ce->chanlist[i].engine = crypto_engine_alloc_init(ce->dev, true);
f113059e7b4f94 Corentin Labbe 2019-10-12  347  		if (!ce->chanlist[i].engine) {
f113059e7b4f94 Corentin Labbe 2019-10-12  348  			dev_err(ce->dev, "Cannot allocate engine\n");
f113059e7b4f94 Corentin Labbe 2019-10-12  349  			i--;
f113059e7b4f94 Corentin Labbe 2019-10-12  350  			goto error_engine;

err = -ENOMEM;

f113059e7b4f94 Corentin Labbe 2019-10-12  351  		}
f113059e7b4f94 Corentin Labbe 2019-10-12  352  		err = crypto_engine_start(ce->chanlist[i].engine);
f113059e7b4f94 Corentin Labbe 2019-10-12  353  		if (err) {
f113059e7b4f94 Corentin Labbe 2019-10-12  354  			dev_err(ce->dev, "Cannot start engine\n");
f113059e7b4f94 Corentin Labbe 2019-10-12  355  			goto error_engine;
f113059e7b4f94 Corentin Labbe 2019-10-12  356  		}
f113059e7b4f94 Corentin Labbe 2019-10-12  357  		ce->chanlist[i].tl = dma_alloc_coherent(ce->dev,
f113059e7b4f94 Corentin Labbe 2019-10-12  358  							sizeof(struct ce_task),
f113059e7b4f94 Corentin Labbe 2019-10-12  359  							&ce->chanlist[i].t_phy,
f113059e7b4f94 Corentin Labbe 2019-10-12  360  							GFP_KERNEL);
f113059e7b4f94 Corentin Labbe 2019-10-12  361  		if (!ce->chanlist[i].tl) {
f113059e7b4f94 Corentin Labbe 2019-10-12  362  			dev_err(ce->dev, "Cannot get DMA memory for task %d\n",
f113059e7b4f94 Corentin Labbe 2019-10-12  363  				i);
f113059e7b4f94 Corentin Labbe 2019-10-12  364  			err = -ENOMEM;
f113059e7b4f94 Corentin Labbe 2019-10-12  365  			goto error_engine;
f113059e7b4f94 Corentin Labbe 2019-10-12  366  		}
f113059e7b4f94 Corentin Labbe 2019-10-12  367  	}
f113059e7b4f94 Corentin Labbe 2019-10-12  368  	return 0;
f113059e7b4f94 Corentin Labbe 2019-10-12  369  error_engine:
f113059e7b4f94 Corentin Labbe 2019-10-12  370  	sun8i_ce_free_chanlist(ce, i);
f113059e7b4f94 Corentin Labbe 2019-10-12 @371  	return err;
f113059e7b4f94 Corentin Labbe 2019-10-12  372  }

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