Patch "iio:adc:ti_am335x_adc Fix buffered mode by identifying as software buffer." has been added to the 4.4-stable tree

Patch "iio:adc:ti_am335x_adc Fix buffered mode by identifying as software buffer." has been added to the 4.4-stable tree

[gregkh]

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

    iio:adc:ti_am335x_adc Fix buffered mode by identifying as software buffer.

to the 4.4-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-adc-ti_am335x_adc-fix-buffered-mode-by-identifying-as-software-buffer.patch
and it can be found in the queue-4.4 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 9d0be85d4e2cfa2519ae16efe7ff4a7150c43c0b Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <jic23@kernel.org>
Date: Fri, 1 Jan 2016 18:05:34 +0000
Subject: iio:adc:ti_am335x_adc Fix buffered mode by identifying as software buffer.

From: Jonathan Cameron <jic23@kernel.org>

commit 9d0be85d4e2cfa2519ae16efe7ff4a7150c43c0b upstream.

Whilst this part has a hardware buffer, the identifcation that IIO cares
about is the userspace facing end.  It this case we push individual elements
from the hardware fifo into the software interface (specifically a kfifo)
rather than providing direct reads through to a hardware buffer
(as we still do in the sca3000 for example).

Technically the original specification as a hardware buffer could be
considered wrong, but it didn't matter until the patch listed below.

Result is that any attempt to enable the buffer will return -EINVAL

Fixes: 225d59adf1c8 ("iio: Specify supported modes for buffers")
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/iio/adc/ti_am335x_adc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -289,7 +289,7 @@ static int tiadc_iio_buffered_hardware_s
 		goto error_kfifo_free;
 
 	indio_dev->setup_ops = setup_ops;
-	indio_dev->modes |= INDIO_BUFFER_HARDWARE;
+	indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
 
 	return 0;
 


Patches currently in stable-queue which might be from jic23@kernel.org are

queue-4.4/iio-adis_buffer-fix-out-of-bounds-memory-access.patch
queue-4.4/iio-add-iio_trigger-dependency-to-stk8ba50.patch
queue-4.4/iio-add-has_iomem-dependency-to-vf610_adc.patch
queue-4.4/iio-light-acpi-als-report-data-as-processed.patch
queue-4.4/iio-dac-mcp4725-set-iio-name-property-in-sysfs.patch
queue-4.4/iio-pressure-mpl115-fix-temperature-offset-sign.patch
queue-4.4/iio-adc-ti_am335x_adc-fix-buffered-mode-by-identifying-as-software-buffer.patch
queue-4.4/iio-light-use-a-signed-return-type-for-ltr501_match_samp_freq.patch
queue-4.4/iio-inkern-fix-a-null-dereference-on-error.patch