linux-kernel - Re: [PATCH 8/9] platform: goldfish: pipe: Replace pr_ with dev

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Date:   Tue, 14 Aug 2018 11:16:57 +0800
From:   kbuild test robot <lkp@...el.com>
To:     rkir@...gle.com
Cc:     kbuild-all@...org, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, tkjos@...gle.com,
        Roman Kiryanov <rkir@...gle.com>
Subject: Re: [PATCH 8/9] platform: goldfish: pipe: Replace pr_ with dev_ for
 logging

Hi Roman,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.18 next-20180813]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/rkir-google-com/platform-goldfish-pipe-Fix-comments-to-fit-80-columns/20180814-104717
config: i386-randconfig-x008-201832 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   drivers/platform//goldfish/goldfish_pipe.c: In function 'goldfish_pipe_read_write':
>> drivers/platform//goldfish/goldfish_pipe.c:405:22: error: 'struct goldfish_pipe_dev' has no member named 'pdev_dev'
     pdev_dev = pipe->dev->pdev_dev;
                         ^~

vim +405 drivers/platform//goldfish/goldfish_pipe.c

   379	
   380	static ssize_t goldfish_pipe_read_write(struct file *filp,
   381		char __user *buffer, size_t bufflen, int is_write)
   382	{
   383		struct goldfish_pipe *pipe = filp->private_data;
   384		int count = 0, ret = -EINVAL;
   385		unsigned long address, address_end, last_page;
   386		unsigned int last_page_size;
   387		struct device *pdev_dev;
   388	
   389		/* If the emulator already closed the pipe, no need to go further */
   390		if (unlikely(test_bit(BIT_CLOSED_ON_HOST, &pipe->flags)))
   391			return -EIO;
   392		/* Null reads or writes succeeds */
   393		if (unlikely(bufflen == 0))
   394			return 0;
   395		/* Check the buffer range for access */
   396		if (unlikely(!access_ok(is_write ? VERIFY_WRITE : VERIFY_READ,
   397				buffer, bufflen)))
   398			return -EFAULT;
   399	
   400		address = (unsigned long)buffer;
   401		address_end = address + bufflen;
   402		last_page = (address_end - 1) & PAGE_MASK;
   403		last_page_size = ((address_end - 1) & ~PAGE_MASK) + 1;
   404	
 > 405		pdev_dev = pipe->dev->pdev_dev;
   406	
   407		while (address < address_end) {
   408			s32 consumed_size;
   409			int status;
   410	
   411			ret = transfer_max_buffers(pipe, address, address_end, is_write,
   412					last_page, last_page_size, &consumed_size,
   413					&status);
   414			if (ret < 0)
   415				break;
   416	
   417			if (consumed_size > 0) {
   418				/* No matter what's the status, we've transferred
   419				 * something.
   420				 */
   421				count += consumed_size;
   422				address += consumed_size;
   423			}
   424			if (status > 0)
   425				continue;
   426			if (status == 0) {
   427				/* EOF */
   428				ret = 0;
   429				break;
   430			}
   431			if (count > 0) {
   432				/*
   433				 * An error occurred, but we already transferred
   434				 * something on one of the previous iterations.
   435				 * Just return what we already copied and log this
   436				 * err.
   437				 */
   438				if (status != PIPE_ERROR_AGAIN)
   439					dev_err_ratelimited(pdev_dev,
   440						"goldfish_pipe: backend error %d on %s\n",
   441						status, is_write ? "write" : "read");
   442				break;
   443			}
   444	
   445			/*
   446			 * If the error is not PIPE_ERROR_AGAIN, or if we are in
   447			 * non-blocking mode, just return the error code.
   448			 */
   449			if (status != PIPE_ERROR_AGAIN ||
   450				(filp->f_flags & O_NONBLOCK) != 0) {
   451				ret = goldfish_pipe_error_convert(status);
   452				break;
   453			}
   454	
   455			status = wait_for_host_signal(pipe, is_write);
   456			if (status < 0)
   457				return status;
   458		}
   459	
   460		if (count > 0)
   461			return count;
   462		return ret;
   463	}
   464	

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