[linux-next:master 8312/12711] drivers/firmware/turris-mox-rwtm.c:386:27: sparse: sparse: incorrect type in argument 1 (different base types)

[linux-next:master 8312/12711] drivers/firmware/turris-mox-rwtm.c:386:27: sparse: sparse: incorrect type in argument 1 (different base types)

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   04b4571786305a76ad81757bbec78eb16a5de582
commit: 50524d787de34300ca9189e63afe13e26d782bea [8312/12711] firmware: turris-mox-rwtm: support ECDSA signatures via debugfs
config: arm64-randconfig-s032-20200729 (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: v0.6.2-97-gee4aea9a-dirty
        git checkout 50524d787de34300ca9189e63afe13e26d782bea
        # 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@intel.com>


sparse warnings: (new ones prefixed by >>)

>> drivers/firmware/turris-mox-rwtm.c:386:27: sparse: sparse: incorrect type in argument 1 (different base types) @@     expected restricted __be32 [usertype] *dst @@     got unsigned int * @@
>> drivers/firmware/turris-mox-rwtm.c:386:27: sparse:     expected restricted __be32 [usertype] *dst
>> drivers/firmware/turris-mox-rwtm.c:386:27: sparse:     got unsigned int *

vim +386 drivers/firmware/turris-mox-rwtm.c

   325	
   326	static ssize_t do_sign_write(struct file *file, const char __user *buf,
   327				     size_t len, loff_t *ppos)
   328	{
   329		struct mox_rwtm *rwtm = file->private_data;
   330		struct armada_37xx_rwtm_rx_msg *reply = &rwtm->reply;
   331		struct armada_37xx_rwtm_tx_msg msg;
   332		loff_t dummy = 0;
   333		ssize_t ret;
   334	
   335		/* the input is a SHA-512 hash, so exactly 64 bytes have to be read */
   336		if (len != 64)
   337			return -EINVAL;
   338	
   339		/* if last result is not zero user has not read that information yet */
   340		if (rwtm->last_sig_done)
   341			return -EBUSY;
   342	
   343		if (!mutex_trylock(&rwtm->busy))
   344			return -EBUSY;
   345	
   346		/*
   347		 * Here we have to send:
   348		 *   1. Address of the input to sign.
   349		 *      The input is an array of 17 32-bit words, the first (most
   350		 *      significat) is 0, the rest 16 words are copied from the SHA-512
   351		 *      hash given by the user and converted from BE to LE.
   352		 *   2. Address of the buffer where ECDSA signature value R shall be
   353		 *      stored by the rWTM firmware.
   354		 *   3. Address of the buffer where ECDSA signature value S shall be
   355		 *      stored by the rWTM firmware.
   356		 */
   357		memset(rwtm->buf, 0, 4);
   358		ret = simple_write_to_buffer(rwtm->buf + 4, 64, &dummy, buf, len);
   359		if (ret < 0)
   360			goto unlock_mutex;
   361		be32_to_cpu_array(rwtm->buf, rwtm->buf, 17);
   362	
   363		msg.command = MBOX_CMD_SIGN;
   364		msg.args[0] = 1;
   365		msg.args[1] = rwtm->buf_phys;
   366		msg.args[2] = rwtm->buf_phys + 68;
   367		msg.args[3] = rwtm->buf_phys + 2 * 68;
   368		ret = mbox_send_message(rwtm->mbox, &msg);
   369		if (ret < 0)
   370			goto unlock_mutex;
   371	
   372		ret = wait_for_completion_interruptible(&rwtm->cmd_done);
   373		if (ret < 0)
   374			goto unlock_mutex;
   375	
   376		ret = MBOX_STS_VALUE(reply->retval);
   377		if (MBOX_STS_ERROR(reply->retval) != MBOX_STS_SUCCESS)
   378			goto unlock_mutex;
   379	
   380		/*
   381		 * Here we read the R and S values of the ECDSA signature
   382		 * computed by the rWTM firmware and convert their words from
   383		 * LE to BE.
   384		 */
   385		memcpy(rwtm->last_sig, rwtm->buf + 68, 136);
 > 386		cpu_to_be32_array(rwtm->last_sig, rwtm->last_sig, 34);
   387		rwtm->last_sig_done = 1;
   388	
   389		mutex_unlock(&rwtm->busy);
   390		return len;
   391	unlock_mutex:
   392		mutex_unlock(&rwtm->busy);
   393		return ret;
   394	}
   395	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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