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Message-ID: <202210020359.C1JRsE0Y-lkp@intel.com>
Date: Sun, 2 Oct 2022 03:47:16 +0800
From: kernel test robot <lkp@...el.com>
To: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
Matti Vaittinen <mazziesaccount@...il.com>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
Cosmin Tanislav <cosmin.tanislav@...log.com>,
Lars-Peter Clausen <lars@...afoo.de>,
Michael Hennerich <Michael.Hennerich@...log.com>,
Jonathan Cameron <jic23@...nel.org>,
Eugen Hristev <eugen.hristev@...rochip.com>,
Nicolas Ferre <nicolas.ferre@...rochip.com>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Claudiu Beznea <claudiu.beznea@...rochip.com>,
Alexandru Ardelean <alexandru.ardelean@...log.com>,
Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
Miaoqian Lin <linmq006@...il.com>,
Miquel Raynal <miquel.raynal@...tlin.com>,
Uwe Kleine-König
<u.kleine-koenig@...gutronix.de>,
Mihail Chindris <mihail.chindris@...log.com>,
linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/2] iio: Fix unsafe buffer attributes
Hi Matti,
I love your patch! Yet something to improve:
[auto build test ERROR on v6.0-rc7]
[also build test ERROR on linus/master]
[cannot apply to jic23-iio/togreg next-20220930]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Matti-Vaittinen/iio-Add-IIO_STATIC_CONST_DEVICE_ATTR/20220930-191558
base: f76349cf41451c5c42a99f18a9163377e4b364ff
config: i386-randconfig-a002
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/71aecc2b7a59a431f1a4ca7f6e4670f6ca889cb0
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Matti-Vaittinen/iio-Add-IIO_STATIC_CONST_DEVICE_ATTR/20220930-191558
git checkout 71aecc2b7a59a431f1a4ca7f6e4670f6ca889cb0
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
>> drivers/iio/buffer/industrialio-buffer-dmaengine.c:204:39: error: incompatible pointer types assigning to 'const struct iio_dev_attr **' from 'const struct attribute *[2]' [-Werror,-Wincompatible-pointer-types]
dmaengine_buffer->queue.buffer.attrs = iio_dmaengine_buffer_attrs;
^ ~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
vim +204 drivers/iio/buffer/industrialio-buffer-dmaengine.c
4538c185680996 Lars-Peter Clausen 2019-12-11 149
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 150 /**
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 151 * iio_dmaengine_buffer_alloc() - Allocate new buffer which uses DMAengine
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 152 * @dev: Parent device for the buffer
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 153 * @channel: DMA channel name, typically "rx".
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 154 *
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 155 * This allocates a new IIO buffer which internally uses the DMAengine framework
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 156 * to perform its transfers. The parent device will be used to request the DMA
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 157 * channel.
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 158 *
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 159 * Once done using the buffer iio_dmaengine_buffer_free() should be used to
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 160 * release it.
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 161 */
25918a9c641c3c Alexandru Ardelean 2020-09-23 162 static struct iio_buffer *iio_dmaengine_buffer_alloc(struct device *dev,
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 163 const char *channel)
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 164 {
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 165 struct dmaengine_buffer *dmaengine_buffer;
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 166 unsigned int width, src_width, dest_width;
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 167 struct dma_slave_caps caps;
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 168 struct dma_chan *chan;
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 169 int ret;
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 170
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 171 dmaengine_buffer = kzalloc(sizeof(*dmaengine_buffer), GFP_KERNEL);
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 172 if (!dmaengine_buffer)
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 173 return ERR_PTR(-ENOMEM);
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 174
f339f979bb333e Peter Ujfalusi 2019-11-13 175 chan = dma_request_chan(dev, channel);
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 176 if (IS_ERR(chan)) {
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 177 ret = PTR_ERR(chan);
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 178 goto err_free;
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 179 }
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 180
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 181 ret = dma_get_slave_caps(chan, &caps);
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 182 if (ret < 0)
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 183 goto err_free;
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 184
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 185 /* Needs to be aligned to the maximum of the minimums */
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 186 if (caps.src_addr_widths)
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 187 src_width = __ffs(caps.src_addr_widths);
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 188 else
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 189 src_width = 1;
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 190 if (caps.dst_addr_widths)
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 191 dest_width = __ffs(caps.dst_addr_widths);
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 192 else
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 193 dest_width = 1;
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 194 width = max(src_width, dest_width);
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 195
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 196 INIT_LIST_HEAD(&dmaengine_buffer->active);
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 197 dmaengine_buffer->chan = chan;
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 198 dmaengine_buffer->align = width;
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 199 dmaengine_buffer->max_size = dma_get_max_seg_size(chan->device->dev);
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 200
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 201 iio_dma_buffer_init(&dmaengine_buffer->queue, chan->device->dev,
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 202 &iio_dmaengine_default_ops);
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 203
5e6dc43e2caa14 Alexandru Ardelean 2020-09-29 @204 dmaengine_buffer->queue.buffer.attrs = iio_dmaengine_buffer_attrs;
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 205 dmaengine_buffer->queue.buffer.access = &iio_dmaengine_buffer_ops;
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 206
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 207 return &dmaengine_buffer->queue.buffer;
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 208
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 209 err_free:
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 210 kfree(dmaengine_buffer);
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 211 return ERR_PTR(ret);
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 212 }
2d6ca60f328450 Lars-Peter Clausen 2015-10-13 213
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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