[PATCHv2 1/3,RESEND] iio: dht11: Fix out-of-bounds read

[Harald Geyer]

As we access i-1 we must not start with i=0.

From: Richard Weinberger <richard@xxxxxx>
Signed-off-by: Richard Weinberger <richard@xxxxxx>
Acked-by: Hartmut Knaack <knaack.h@xxxxxx>
Acked-by: Harald Geyer <harald@xxxxxxxxx>
Reviewed-by: Sanjeev Sharma <sanjeev_sharma@xxxxxxxxxx>
---
Resending again to get the metadata right.
No Signed-off-by from me, because I didn't contribute anything.
No changes since v1 except reordering.

 drivers/iio/humidity/dht11.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/iio/humidity/dht11.c b/drivers/iio/humidity/dht11.c
index 623c145..f546eca 100644
--- a/drivers/iio/humidity/dht11.c
+++ b/drivers/iio/humidity/dht11.c
@@ -88,7 +88,7 @@ static int dht11_decode(struct dht11 *dht11, int offset)
 	unsigned char temp_int, temp_dec, hum_int, hum_dec, checksum;
 
 	/* Calculate timestamp resolution */
-	for (i = 0; i < dht11->num_edges; ++i) {
+	for (i = 1; i < dht11->num_edges; ++i) {
 		t = dht11->edges[i].ts - dht11->edges[i-1].ts;
 		if (t > 0 && t < timeres)
 			timeres = t;
-- 
1.7.2.5

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