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Commit 2e020cf3 authored by Vijayavardhan Vennapusa's avatar Vijayavardhan Vennapusa
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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>
parent c5bc590f

drivers/usb/gadget/f_fs.c

+14 −2
Original line number Diff line number Diff line
@@ -762,6 +762,7 @@ static void ffs_epfile_io_complete(struct usb_ep *_ep, struct usb_request *req) 
	}

}



#define MAX_BUF_LEN	4096

static ssize_t ffs_epfile_io(struct file *file,

			     char __user *buf, size_t len, int read)

{
@@ -911,17 +912,28 @@ first_try: 
				ret = -ENODEV;

			spin_unlock_irq(&epfile->ffs->eps_lock);

			if (read && ret > 0) {

				if (ret > len)

				if (len != MAX_BUF_LEN && ret < len)

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

								ret, len);

				if (ret > len) {

					ret = -EOVERFLOW;

				else if (unlikely(copy_to_user(buf, data, ret)))

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

								ret, len);

				} else if (unlikely(copy_to_user(

							buf, data, ret))) {

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

									ret);

					ret = -EFAULT;

				}

			}

		}

	}



	mutex_unlock(&epfile->mutex);

error:

	kfree(data);

	if (ret < 0)

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

	return ret;

}