From: Lars-Peter Clausen Date: Mon, 11 Jul 2016 11:54:17 +0000 (+0200) Subject: iio: ad799x: Fix buffered capture for ad7991/ad7995/ad7999 X-Git-Tag: v4.7.5~113 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4215a755968d4e21fa982298e16934506723e038;p=thirdparty%2Fkernel%2Fstable.git iio: ad799x: Fix buffered capture for ad7991/ad7995/ad7999 commit 7d3cc21dab5313a02f2f3ca8164529b828a030d1 upstream. The data buffer for captured mode for the ad799x driver is allocated in the update_scan_mode() callback. This callback is not set in the iio_info struct for the ad7791/ad7995/ad7999, which means that the data buffer is not allocated when a captured transfer is started. As a result the driver crashes when the first sample is received. To fix this properly set the update_scan_mode() callback. Fixes: d8dca33027c1 ("staging:iio:ad799x: Preallocate sample buffer") Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c index a3f5254f4e512..03962233501c2 100644 --- a/drivers/iio/adc/ad799x.c +++ b/drivers/iio/adc/ad799x.c @@ -533,6 +533,7 @@ static struct attribute_group ad799x_event_attrs_group = { static const struct iio_info ad7991_info = { .read_raw = &ad799x_read_raw, .driver_module = THIS_MODULE, + .update_scan_mode = ad799x_update_scan_mode, }; static const struct iio_info ad7993_4_7_8_noirq_info = {