From 7e982555d89cc84b1fa23b5d54c7ffd9f7753908 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 30 May 2016 15:50:24 +0200 Subject: [PATCH] staging: iio: fix ad7606_spi regression MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit As pointed out by Geert Uytterhoeven, the patch was incorrect and breaks the driver, which was fortunately pointed out by this gcc warning: drivers/staging/iio/adc/ad7606_spi.c: In function ‘ad7606_spi_read_block’: drivers/staging/iio/adc/ad7606_spi.c:34: warning: ‘data’ is used uninitialized in this function The effect of the patch is that the data is copied into a random memory location (from the uninitialized pointer) instead of being byteswapped in place. This adds the initialization for the 'data' variable back to restore the original behavior. Cc: Ksenija Stanojevic Fixes: 87787e5ef727 ("Staging: iio: Fix sparse endian warning") Signed-off-by: Arnd Bergmann Acked-by: Geert Uytterhoeven Signed-off-by: Jonathan Cameron --- drivers/staging/iio/adc/ad7606_spi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/iio/adc/ad7606_spi.c b/drivers/staging/iio/adc/ad7606_spi.c index 825da0769936..9587fa86dc69 100644 --- a/drivers/staging/iio/adc/ad7606_spi.c +++ b/drivers/staging/iio/adc/ad7606_spi.c @@ -21,7 +21,7 @@ static int ad7606_spi_read_block(struct device *dev, { struct spi_device *spi = to_spi_device(dev); int i, ret; - unsigned short *data; + unsigned short *data = buf; __be16 *bdata = buf; ret = spi_read(spi, buf, count * 2); -- 2.20.1