From 0559ef7fde67bc6c83c6eb6329dbd6649528263e Mon Sep 17 00:00:00 2001
From: Slawomir Stepien <sst@poczta.fm>
Date: Sat, 20 Oct 2018 23:04:11 +0200
Subject: [PATCH] staging: iio: adc: ad7280a: handle error from __ad7280_read32()
Git-commit: 0559ef7fde67bc6c83c6eb6329dbd6649528263e
Patch-mainline: v5.0-rc1
References: bsc#1051510
Inside __ad7280_read32(), the spi_sync_transfer() can fail with negative
error code. This change will ensure that this error is being passed up
in the call stack, so it can be handled.
Signed-off-by: Slawomir Stepien <sst@poczta.fm>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/staging/iio/adc/ad7280a.c | 17 +++++++++++++----
1 file changed, 13 insertions(+), 4 deletions(-)
diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c
index 58420dcb406d..cbeb52485a31 100644
--- a/drivers/staging/iio/adc/ad7280a.c
+++ b/drivers/staging/iio/adc/ad7280a.c
@@ -256,7 +256,9 @@ static int ad7280_read(struct ad7280_state *st, unsigned int devaddr,
if (ret)
return ret;
- __ad7280_read32(st, &tmp);
+ ret = __ad7280_read32(st, &tmp);
+ if (ret)
+ return ret;
if (ad7280_check_crc(st, tmp))
return -EIO;
@@ -294,7 +296,9 @@ static int ad7280_read_channel(struct ad7280_state *st, unsigned int devaddr,
ad7280_delay(st);
- __ad7280_read32(st, &tmp);
+ ret = __ad7280_read32(st, &tmp);
+ if (ret)
+ return ret;
if (ad7280_check_crc(st, tmp))
return -EIO;
@@ -327,7 +331,9 @@ static int ad7280_read_all_channels(struct ad7280_state *st, unsigned int cnt,
ad7280_delay(st);
for (i = 0; i < cnt; i++) {
- __ad7280_read32(st, &tmp);
+ ret = __ad7280_read32(st, &tmp);
+ if (ret)
+ return ret;
if (ad7280_check_crc(st, tmp))
return -EIO;
@@ -370,7 +376,10 @@ static int ad7280_chain_setup(struct ad7280_state *st)
return ret;
for (n = 0; n <= AD7280A_MAX_CHAIN; n++) {
- __ad7280_read32(st, &val);
+ ret = __ad7280_read32(st, &val);
+ if (ret)
+ return ret;
+
if (val == 0)
return n - 1;
--
2.16.4