2019-06-03 17:06:03

by Colin King

Subject: [PATCH][next] drm/bridge: sii902x: fix comparision of u32 with less than zero

From: Colin Ian King <[email protected]>

The less than check for the variable num_lanes is always going to be
false because the variable is a u32. Fix this by making num_lanes an
int and also make loop index i an int too.

Addresses-Coverity: ("Unsigned compared against 0")
Fixes: ff5781634c41 ("drm/bridge: sii902x: Implement HDMI audio support")
Signed-off-by: Colin Ian King <[email protected]>
---
drivers/gpu/drm/bridge/sii902x.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index d6f98d388ac2..21a947603c88 100644
--- a/drivers/gpu/drm/bridge/sii902x.c
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -719,7 +719,7 @@ static int sii902x_audio_codec_init(struct sii902x *sii902x,
.max_i2s_channels = 0,
};
u8 lanes[4];
- u32 num_lanes, i;
+ int num_lanes, i;

if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) {
dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n",
--
2.20.1

2019-06-07 09:49:40

by Andrzej Hajda

Subject: Re: [PATCH][next] drm/bridge: sii902x: fix comparision of u32 with less than zero

On 03.06.2019 16:21, Colin King wrote:
> From: Colin Ian King <[email protected]>
>
> The less than check for the variable num_lanes is always going to be
> false because the variable is a u32. Fix this by making num_lanes an
> int and also make loop index i an int too.
>
> Addresses-Coverity: ("Unsigned compared against 0")


Is there a rule in Kernel of adding such tags?

I have spotted only: Addresses-Coverity-ID?


Beside this:

Reviewed-by: Andrzej Hajda <[email protected]>

 --
Regards
Andrzej


> Fixes: ff5781634c41 ("drm/bridge: sii902x: Implement HDMI audio support")
> Signed-off-by: Colin Ian King <[email protected]>
> ---
> drivers/gpu/drm/bridge/sii902x.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
> index d6f98d388ac2..21a947603c88 100644
> --- a/drivers/gpu/drm/bridge/sii902x.c
> +++ b/drivers/gpu/drm/bridge/sii902x.c
> @@ -719,7 +719,7 @@ static int sii902x_audio_codec_init(struct sii902x *sii902x,
> .max_i2s_channels = 0,
> };
> u8 lanes[4];
> - u32 num_lanes, i;
> + int num_lanes, i;
>
> if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) {
> dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n",

2019-06-07 10:02:13

by Colin King

Subject: Re: [PATCH][next] drm/bridge: sii902x: fix comparision of u32 with less than zero

On 07/06/2019 10:41, Andrzej Hajda wrote:
> On 03.06.2019 16:21, Colin King wrote:
>> From: Colin Ian King <[email protected]>
>>
>> The less than check for the variable num_lanes is always going to be
>> false because the variable is a u32. Fix this by making num_lanes an
>> int and also make loop index i an int too.
>>
>> Addresses-Coverity: ("Unsigned compared against 0")
>
>
> Is there a rule in Kernel of adding such tags?
>
> I have spotted only: Addresses-Coverity-ID?
>

Unfortunately I'm running a Coverity in-house and so the Coverity ID is
not public, so it does not make sense for me to report the ID.

Colin

>
> Beside this:
>
> Reviewed-by: Andrzej Hajda <[email protected]>
>
>  --
> Regards
> Andrzej
>
>
>> Fixes: ff5781634c41 ("drm/bridge: sii902x: Implement HDMI audio support")
>> Signed-off-by: Colin Ian King <[email protected]>
>> ---
>> drivers/gpu/drm/bridge/sii902x.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
>> index d6f98d388ac2..21a947603c88 100644
>> --- a/drivers/gpu/drm/bridge/sii902x.c
>> +++ b/drivers/gpu/drm/bridge/sii902x.c
>> @@ -719,7 +719,7 @@ static int sii902x_audio_codec_init(struct sii902x *sii902x,
>> .max_i2s_channels = 0,
>> };
>> u8 lanes[4];
>> - u32 num_lanes, i;
>> + int num_lanes, i;
>>
>> if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) {
>> dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n",
>
>

2019-06-07 13:17:43

by Andrzej Hajda

Subject: Re: [PATCH][next] drm/bridge: sii902x: fix comparision of u32 with less than zero

On 03.06.2019 16:21, Colin King wrote:
> From: Colin Ian King <[email protected]>
>
> The less than check for the variable num_lanes is always going to be
> false because the variable is a u32. Fix this by making num_lanes an
> int and also make loop index i an int too.
>
> Addresses-Coverity: ("Unsigned compared against 0")
> Fixes: ff5781634c41 ("drm/bridge: sii902x: Implement HDMI audio support")
> Signed-off-by: Colin Ian King <[email protected]>
> ---
> drivers/gpu/drm/bridge/sii902x.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
> index d6f98d388ac2..21a947603c88 100644
> --- a/drivers/gpu/drm/bridge/sii902x.c
> +++ b/drivers/gpu/drm/bridge/sii902x.c
> @@ -719,7 +719,7 @@ static int sii902x_audio_codec_init(struct sii902x *sii902x,
> .max_i2s_channels = 0,
> };
> u8 lanes[4];
> - u32 num_lanes, i;
> + int num_lanes, i;
>
> if (!of_property_read_bool(dev->of_node, "#sound-dai-cells")) {
> dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n",

Queued to drm-misc-next.

--
Regards
Andrzej