[PATCH] thermal: int340x: Increase bitmap size

[PATCH] thermal: int340x: Increase bitmap size

[Srinivas Pandruvada]

The number of policies are 10, so can't be supported by the bitmap size
of u8. Even though there are no platfoms with these many policies, but
as correctness increase to u16.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Fixes: 16fc8eca1975 ("thermal/int340x_thermal: Add additional UUIDs")
Cc: stable@vger.kernel.org
---
 drivers/thermal/intel/int340x_thermal/int3400_thermal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
index 72acb1f61849..c2d3df302214 100644
--- a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
+++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
@@ -53,7 +53,7 @@ struct int3400_thermal_priv {
 	struct art *arts;
 	int trt_count;
 	struct trt *trts;
-	u8 uuid_bitmap;
+	u16 uuid_bitmap;
 	int rel_misc_dev_res;
 	int current_uuid_index;
 	char *data_vault;
-- 
2.31.1

RE: [PATCH] thermal: int340x: Increase bitmap size

[David Laight]

From: Srinivas Pandruvada
> Sent: 14 March 2022 14:50
> 
> The number of policies are 10, so can't be supported by the bitmap size
> of u8. Even though there are no platfoms with these many policies, but
> as correctness increase to u16.

You might as well just use 'unsigned int'.
May generate better code and there is still padding
in the structure.

	David

> 
> Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
> Fixes: 16fc8eca1975 ("thermal/int340x_thermal: Add additional UUIDs")
> Cc: stable@vger.kernel.org
> ---
>  drivers/thermal/intel/int340x_thermal/int3400_thermal.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> index 72acb1f61849..c2d3df302214 100644
> --- a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> +++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> @@ -53,7 +53,7 @@ struct int3400_thermal_priv {
>  	struct art *arts;
>  	int trt_count;
>  	struct trt *trts;
> -	u8 uuid_bitmap;
> +	u16 uuid_bitmap;
>  	int rel_misc_dev_res;
>  	int current_uuid_index;
>  	char *data_vault;
> --
> 2.31.1

-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)

Re: [PATCH] thermal: int340x: Increase bitmap size

[srinivas pandruvada]

On Mon, 2022-03-14 at 15:28 +0000, David Laight wrote:
> From: Srinivas Pandruvada
> > Sent: 14 March 2022 14:50
> > 
> > The number of policies are 10, so can't be supported by the bitmap
> > size
> > of u8. Even though there are no platfoms with these many policies,
> > but
> > as correctness increase to u16.
> 
> You might as well just use 'unsigned int'.
> May generate better code and there is still padding
> in the structure.
Correct. I can update the patch.

Thanks,
Srinivas

> 
>         David
> 
> > 
> > Signed-off-by: Srinivas Pandruvada <
> > srinivas.pandruvada@linux.intel.com>
> > Fixes: 16fc8eca1975 ("thermal/int340x_thermal: Add additional
> > UUIDs")
> > Cc: stable@vger.kernel.org
> > ---
> >  drivers/thermal/intel/int340x_thermal/int3400_thermal.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git
> > a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> > b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> > index 72acb1f61849..c2d3df302214 100644
> > --- a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> > +++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c
> > @@ -53,7 +53,7 @@ struct int3400_thermal_priv {
> >         struct art *arts;
> >         int trt_count;
> >         struct trt *trts;
> > -       u8 uuid_bitmap;
> > +       u16 uuid_bitmap;
> >         int rel_misc_dev_res;
> >         int current_uuid_index;
> >         char *data_vault;
> > --
> > 2.31.1
> 
> -
> Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes,
> MK1 1PT, UK
> Registration No: 1397386 (Wales)
>