Patch "iio: ad7793: Fix the serial interface reset" has been added to the 4.9-stable tree

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

iio: ad7793: Fix the serial interface reset

to the 4.9-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-ad7793-fix-the-serial-interface-reset.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Dragos Bogdan <[email protected]>
Date: Tue, 5 Sep 2017 15:16:13 +0300
Subject: iio: ad7793: Fix the serial interface reset

From: Dragos Bogdan <[email protected]>

commit 7ee3b7ebcb74714df6d94c8f500f307e1ee5dda5 upstream.

The serial interface can be reset by writing 32 consecutive 1s to the device. 'ret' was initialized correctly but its value was overwritten when ad7793_check_platform_data() was called. Since a dedicated reset function is present now, it should be used instead.

---
 drivers/iio/adc/ad7793.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

@@ -257,7 +257,7 @@ static int ad7793_setup(struct iio_dev *
 	unsigned int vref_mv)
 {
 	struct ad7793_state *st = iio_priv(indio_dev);
-	int i, ret = -1;
+	int i, ret;
 	unsigned long long scale_uv;
 	u32 id;
 

@@ -266,7 +266,7 @@ static int ad7793_setup(struct iio_dev *
 		return ret;
 
 	/* reset the serial interface */
-	ret = spi_write(st->sd.spi, (u8 *)&ret, sizeof(ret));
+	ret = ad_sd_reset(&st->sd, 32);
 	if (ret < 0)
 		goto out;
 	usleep_range(500, 2000); /* Wait for at least 500us */

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/iio-ad7793-fix-the-serial-interface-reset.patch queue-4.9/iio-ad_sigma_delta-implement-a-dedicated-reset-function.patch