target/linux/generic/backport-4.19/504-v5.1-iio-chemical-sps30-fix-a-loop-timeout-test.patch

   1 From 905889b4a34c753a538015f0b2cdaa0c9e3a4fd5 Mon Sep 17 00:00:00 2001
   2 From: Dan Carpenter <dan.carpenter@oracle.com>
   3 Date: Sat, 9 Feb 2019 12:03:52 +0300
   4 Subject: [PATCH] iio: chemical: sps30: fix a loop timeout test
   5
   6 The "while (tries--) {" loop is a postop so it exits with "tries" set
   7 to -1.
   8
   9 Fixes: 232e0f6ddeae ("iio: chemical: add support for Sensirion SPS30 sensor")
  10 Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
  11 Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
  12 ---
  13  drivers/iio/chemical/sps30.c | 2 +-
  14  1 file changed, 1 insertion(+), 1 deletion(-)
  15
  16 diff --git a/drivers/iio/chemical/sps30.c b/drivers/iio/chemical/sps30.c
  17 index e03a28a67146..375df5060ed5 100644
  18 --- a/drivers/iio/chemical/sps30.c
  19 +++ b/drivers/iio/chemical/sps30.c
  20 @@ -210,7 +210,7 @@ static int sps30_do_meas(struct sps30_state *state, s32 *data, int size)
  21                 msleep_interruptible(300);
  22         }
  23
  24 -       if (!tries)
  25 +       if (tries == -1)
  26                 return -ETIMEDOUT;
  27
  28         ret = sps30_do_cmd(state, SPS30_READ_DATA, tmp, sizeof(int) * size);