Patch "iio: buffer: correctly return bytes written in output buffers" has been added to the 6.2-stable tree

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

    iio: buffer: correctly return bytes written in output buffers

to the 6.2-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-buffer-correctly-return-bytes-written-in-output-buffers.patch
and it can be found in the queue-6.2 subdirectory.

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


>From b5184a26a28fac1d708b0bfeeb958a9260c2924c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nuno=20S=C3=A1?= <nuno.sa@xxxxxxxxxx>
Date: Thu, 16 Feb 2023 11:14:50 +0100
Subject: iio: buffer: correctly return bytes written in output buffers
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Nuno Sá <nuno.sa@xxxxxxxxxx>

commit b5184a26a28fac1d708b0bfeeb958a9260c2924c upstream.

If for some reason 'rb->access->write()' does not write the full
requested data and the O_NONBLOCK is set, we would return 'n' to
userspace which is not really truth. Hence, let's return the number of
bytes we effectively wrote.

Fixes: 9eeee3b0bf190 ("iio: Add output buffer support")
Signed-off-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
Reviewed-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230216101452.591805-2-nuno.sa@xxxxxxxxxx
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 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
@@ -220,7 +220,7 @@ static ssize_t iio_buffer_write(struct f
 	} while (ret == 0);
 	remove_wait_queue(&rb->pollq, &wait);
 
-	return ret < 0 ? ret : n;
+	return ret < 0 ? ret : written;
 }
 
 /**


Patches currently in stable-queue which might be from nuno.sa@xxxxxxxxxx are

queue-6.2/iio-adc-max11410-fix-read_poll_timeout-usage.patch
queue-6.2/iio-buffer-correctly-return-bytes-written-in-output-buffers.patch
queue-6.2/iio-adis16480-select-config_crc32.patch
queue-6.2/iio-buffer-make-sure-o_nonblock-is-respected.patch



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