* [PATCH 2/7] Staging: iio: adt7316: Add an extra check for 'ret' equals to 0
@ 2018-11-16 22:51 Shreeya Patel
2018-11-17 17:00 ` Jonathan Cameron
0 siblings, 1 reply; 2+ messages in thread
From: Shreeya Patel @ 2018-11-16 22:51 UTC (permalink / raw)
To: lars, Michael.Hennerich, jic23, knaack.h, pmeerw, gregkh,
linux-iio, devel, linux-kernel
ret = 0 indicates a case of no error but no data read from
the bus which is an invalid case. This case doesn't ever happen
in reality. It should perhaps be handled for correctness though.
Signed-off-by: Shreeya Patel <shreeya.patel23498@gmail.com>
---
drivers/staging/iio/addac/adt7316-i2c.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/staging/iio/addac/adt7316-i2c.c b/drivers/staging/iio/addac/adt7316-i2c.c
index 856bcfa60c6c..473e5e34ec00 100644
--- a/drivers/staging/iio/addac/adt7316-i2c.c
+++ b/drivers/staging/iio/addac/adt7316-i2c.c
@@ -30,6 +30,10 @@ static int adt7316_i2c_read(void *client, u8 reg, u8 *data)
}
ret = i2c_smbus_read_byte(client);
+
+ if (!ret)
+ return -EIO;
+
if (ret < 0) {
dev_err(&cl->dev, "I2C read error\n");
return ret;
--
2.17.1
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH 2/7] Staging: iio: adt7316: Add an extra check for 'ret' equals to 0
2018-11-16 22:51 [PATCH 2/7] Staging: iio: adt7316: Add an extra check for 'ret' equals to 0 Shreeya Patel
@ 2018-11-17 17:00 ` Jonathan Cameron
0 siblings, 0 replies; 2+ messages in thread
From: Jonathan Cameron @ 2018-11-17 17:00 UTC (permalink / raw)
To: Shreeya Patel
Cc: lars, Michael.Hennerich, knaack.h, pmeerw, gregkh, linux-iio,
devel, linux-kernel
On Sat, 17 Nov 2018 04:21:32 +0530
Shreeya Patel <shreeya.patel23498@gmail.com> wrote:
> ret = 0 indicates a case of no error but no data read from
> the bus which is an invalid case. This case doesn't ever happen
> in reality. It should perhaps be handled for correctness though.
>
> Signed-off-by: Shreeya Patel <shreeya.patel23498@gmail.com>
Applied to the togreg branch of iio.git and pushed out as testing
for the autobuilders to play with it.
Thanks,
Jonathan
> ---
> drivers/staging/iio/addac/adt7316-i2c.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/staging/iio/addac/adt7316-i2c.c b/drivers/staging/iio/addac/adt7316-i2c.c
> index 856bcfa60c6c..473e5e34ec00 100644
> --- a/drivers/staging/iio/addac/adt7316-i2c.c
> +++ b/drivers/staging/iio/addac/adt7316-i2c.c
> @@ -30,6 +30,10 @@ static int adt7316_i2c_read(void *client, u8 reg, u8 *data)
> }
>
> ret = i2c_smbus_read_byte(client);
> +
> + if (!ret)
> + return -EIO;
> +
> if (ret < 0) {
> dev_err(&cl->dev, "I2C read error\n");
> return ret;
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2018-11-18 3:17 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2018-11-16 22:51 [PATCH 2/7] Staging: iio: adt7316: Add an extra check for 'ret' equals to 0 Shreeya Patel
2018-11-17 17:00 ` Jonathan Cameron
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).