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Commit 5414cade authored by Vijayavardhan Vennapusa's avatar Vijayavardhan Vennapusa Committed by Matt Wagantall
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USB: f_fs: Add print message in case of error scenario 



Add print message in case of error scenarios which will
be useful for debugging adb offline issues.

CRs-Fixed: 720016
Change-Id: I75bc136eab05151abb187c1fa1e5956b6f507297
Signed-off-by: default avatarVijayavardhan Vennapusa <vvreddy@codeaurora.org>
Signed-off-by: default avatarJack Pham <jackp@codeauorora.org>
parent fd8c1eba

drivers/usb/gadget/function/f_fs.c

+15 −1
Original line number Diff line number Diff line
@@ -693,6 +693,7 @@ static void ffs_epfile_async_io_complete(struct usb_ep *_ep, 
	schedule_work(&io_data->work);

}



#define MAX_BUF_LEN	4096

static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data *io_data)

{

	struct ffs_epfile *epfile = file->private_data;
@@ -868,13 +869,24 @@ static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data *io_data) 
				 */

				ret = ep->status;

				if (io_data->read && ret > 0) {

					if (io_data->len != MAX_BUF_LEN &&

							ret < io_data->len)

						pr_err("less data(%zd) recieved than intended length(%zu)\n",

							ret, io_data->len);

					else if (ret > io_data->len)

						pr_err("More data(%zd) recieved than intended length(%zu)\n",

							ret, io_data->len);



					ret = min_t(size_t, ret, io_data->len);



					if (unlikely(copy_to_user(io_data->buf,

						data, ret)))

						data, ret))) {

						pr_err("Fail to copy to user len:%zd\n",

								ret);

						ret = -EFAULT;

					}

				}

			}

			kfree(data);

		}

	}
@@ -887,6 +899,8 @@ error_lock: 
	mutex_unlock(&epfile->mutex);

error:

	kfree(data);

	if (ret < 0)

		pr_err_ratelimited("Error: returning %zd value\n", ret);

	return ret;

}