Patch "iio: industrialio-buffer: Fix iio_buffer_poll return value" has been added to the 4.2-stable tree

Patch "iio: industrialio-buffer: Fix iio_buffer_poll return value" has been added to the 4.2-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    iio: industrialio-buffer: Fix iio_buffer_poll return value

to the 4.2-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     iio-industrialio-buffer-fix-iio_buffer_poll-return-value.patch
and it can be found in the queue-4.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 1bdc0293901cbea23c6dc29432e81919d4719844 Mon Sep 17 00:00:00 2001
From: Cristina Opriceana <cristina.opriceana@gmail.com>
Date: Mon, 3 Aug 2015 13:37:40 +0300
Subject: iio: industrialio-buffer: Fix iio_buffer_poll return value

From: Cristina Opriceana <cristina.opriceana@gmail.com>

commit 1bdc0293901cbea23c6dc29432e81919d4719844 upstream.

Change return value to 0 if no device is bound since
unsigned int cannot support negative error codes.

Fixes: f18e7a068 ("iio: Return -ENODEV for file operations if the
device has been unregistered")

Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/iio/industrialio-buffer.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -151,7 +151,7 @@ unsigned int iio_buffer_poll(struct file
 	struct iio_buffer *rb = indio_dev->buffer;
 
 	if (!indio_dev->info)
-		return -ENODEV;
+		return 0;
 
 	poll_wait(filp, &rb->pollq, wait);
 	if (iio_buffer_ready(indio_dev, rb, rb->watermark, 0))


Patches currently in stable-queue which might be from cristina.opriceana@gmail.com are

queue-4.2/iio-event-remove-negative-error-code-from-iio_event_poll.patch
queue-4.2/iio-industrialio-buffer-fix-iio_buffer_poll-return-value.patch